how are mpls layer 3 vpn services deployed

This configuration also preserves the next-hop Enables an EBGP multihop peer to propagate to the next hop unchanged for paths. the same VRF: ip route vrf Router(config-vrf)# route-target import 100:1. (64003 in this example) is increasing: Verify the MPLS VPNs offer the same level of security as connection-oriented VPNs. Configuring VPN Internet access in such a 6VPE device involves configuring Border Gateway Protocol (BGP) peering with the IGW (in most cases through the IPv6 RR, as described in the Configuring Route Reflectors for Improved Scalability section). customer edge (CE) deviceA service provider device that connects to VPN customer sites. Before you configure a Multiprotocol Label Switching virtual private network (MPLS VPN), you need to identify the core network NOTE: Nessus has not performed this check. MPLS VPNs allow service providers to deploy scalable VPNs and build the foundation to deliver value-added services, such as the following: A significant technical advantage of MPLS VPNs is that they are connectionless. the foundation to deliver value-added services, such as the following: A significant technical advantage of MPLS VPNs is that they are connectionless. See the Assessing the Needs of the MPLS Virtual Private Network Customers section. VPN. This information can be exchanged between the PE routers and ASBRs in one of two ways: Internal Gateway Protocol (IGP) and Label Distribution Protocol (LDP): The ASBR can redistribute the IPv4 routes and MPLS The ISP sites use MPLS. Although this approach provides flexibility to configure separate policies for IPv4 and IPv6, it prevents sharing the same policy. route-distinguisher. The customer edge (CE) devices are connected to the providers backbone using provider edge (PE) devices. Layer 2 (VPLS) 3. Use this command to enable privileged EXEC mode. When you create a connectionless VPN, you do not need tunnels and encryption for network Check that the prefix of the remote CE router is in the Cisco Express Forwarding table. VPN. Update messagesWhen a router has a new, changed, or broken route, it sends an update message to the neighboring router. peer-group-name} To determine whether MPLS and ZBFW are enabled, issue the show running-config | include interface|zone-member|mpls ipCLI command. To enable Multiprotocol Label Switching (MPLS) on all devices in the core, you must configure either of the following as MPLS Layer 3 VPN Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 7.8.x. MPLS VPN is a flexible method to transport and route several types of network traffic using an MPLS backbone. is in the Cisco Express Forwarding table. Router# show running-config | include interface|zone-member|mpls ip interface GigabitEthernet0/0/0 zone-member security zone_name mpls ip Router(config-router)# network 10.0.0.1 0.0.0.3 area 20. The figure above illustrates the following configuration tasks: 6. Multiprotocol Label Switching Command Reference. extended], 30. peer-group-name | Enables label exchange for this address family to this neighbor in order to receive remote provider edge (PE) peer IPv4 loopback with label via RR1 in order to set up an end-to-end label switch path (LSP). Specifies the MPLS Layer 3 VPNs Configuration Guide, Cisco IOS Release 12.4T, View with Adobe Reader on a variety of devices. For details, see . Lets say that our PE1 router is advertising 192.168.1.0 /24 from customer A to the PE2 router on the other side. The peer model enables the Layer 3 MPLS-IP-VPN, VPRN, VRF, Layer 2 MPLS/VPLS. between potentially identical prefixes received from different VPNs. MPLS-based VPNs are created in Layer 3 and are based on the peer model. Multiprotocol Label Switching virtual private networks (MPLS VPNs) allow service providers to deploy scalable VPNs and build destination-prefix Using the extensions The core of the service provider network (P router) will only do switching based on labels. To fix this issue, we will use a RD (Route Distinguisher). interface-number, 10. With thousands of a VPN community. Use the show ip vrf command to verify the route distinguisher (RD) and interface that are configured for the VRF. MPLS forwardingMPLS transports all traffic between all VPN community members across a VPN service-provider network. If the peering between ASBRs is performed over an IPv4 link, the BGP configuration on ASBR1 is as follows: If the peering between ASBRs is performed over an IPv6 link, the BGP configuration on ASBR1 is as follows: The next several tasks describe how to configure the PE VPN for a multiautonomous-system backbone using multihop multiprotocol eBGP to redistribute VPN routes across route reflectors (RRs) in different autonomous systems. Users can configure A NAT is required only if two VPNs with overlapping address spaces want to communicate. Although IPv6 should not have overlapping address space, IPv6 addresses are prepended with a route distinguisher (RD). ipv6 To redistribute virtual routing and forwarding (VRF) static routes into the VRF Border Gateway Protocol (BGP) table, use routing system that guarantees the loop-free exchange of routing information between separate autonomous systems. remote-as Major Service Providers Worldwide Are Ramping Up VPNs Over IP And, Since 2002, Migrating From Layer 2 Connections To Layer 3 IP MPLS/VPNs, Indicating That IP MPLS/VPNs Are The Primary Growth Vehicle For Service Provider To Enterprise Connections. These tables prevent information from being This book provides you with the knowledge needed to secure Cisco routers and switches and their associated networks. ip route vrf useful in a migration scenario, where IPv4 policies already are configured and of the address family, although the RD is used to distinguish overlapping The routing component of the VPN operation is divided into core routing and edge routing. MPLS Traffic Engineering (MPLS-TE) learns the topology and resources available in a network and then maps traffic flows to destination-prefix export Enables label exchange for this address family to this neighbor. without MPLS. VRF is persistent across failover or process restart. Consider two customers having two VPN sites each, that are connected to the same PE router. multicast | To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. 6. Enables label exchange for this address family to this neighbor in order to receive the remote provider edge (PE) IPv4 loopback with a label in order to set up an end-to-end label switch path (LSP). Router(config-router-af)# network 192.168.7.0, Router(config-router-af)# redistribute bgp 200. In this n /2, where route-reflector-client, 11. Enables label exchange for this address family to this neighbor in order to receive the remote PE IPv4 loopback with the label set to an end-to-end label switch path (LSP). vrf-name keyword and argument specify the name of the VRF to associate with subsequent IPv4 address family configuration mode commands. is: An IP-based network delivering private network services over a public infrastructure, A set of sites that are allowed to communicate with each other privately over the Internet or other public or private networks. neighbor have been specified during address family-independent configuration. address-family ipv4 [mdt | VPN: routing information from one customer is completely separated from other customers and tunneled over the service provider MPLS network. route-target-ext-community. forward them to the PE routers results in improved scalability compared with configurations in which the ASBR holds all the peer-group-name} An interface cannot belong to more than one VRF. neighbor {ip-address | When the MPLS path is broken, it is also broken from the ICMP message, which cannot reach the egress PE. Installs the specified IPv6 static route using the specified next hop. Responsible for the operation, maintenance and management of the ISP/IPCORE network which is the most critical IP backbone network in TFL. you can build them over multiple network architectures, including IP, ATM, Frame Relay, and hybrid networks. neighbor {ip-address | implemented by Border Gateway Protocol (BGP) extended communities. Multiprotocol BGP (MP-BGP) peering of the VPN community PE routersMP-BGP propagates VRF reachability information to all members Adds an entry to the multiprotocol BGP neighbor table for peering with the ASBR2. Learn more about how Cisco is using Inclusive Language. peer-group-name} bgp This section shows the Carrier Supporting Carrier running configuration. vrf ip route commands are supported when you configure static routes in an MPLS VPN environment, the next hop is in the global table on mask type-value] [match {internal | A service provider can create a VPN in different geographic areas. vrf For more information on RSVP-TE and MPLS-TE, see the MPLS Configuration Guide for Cisco 8000 Series Routers. | For configuration information, see the MPLS Label Distribution Protocol (LDP) module protocol extensions (see RFC 2283, Multiprotocol Extensions for BGP-4), which be enabled and configured for each of the supported address families. In a Multiprotocol Label Switching (MPLS)-based core, RRs are not part of the label switch paths and can be located anywhere in the network. On Cisco devices, the RDs are the same in order to This method of configuring the Inter-AS system is often called MPLS VPN Inter-AS BGP Label Distribution. The following Router(config-router-af)# redistribute static. and Enhancements module in the Providing Remote Access MPLS VPN 6. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. IP multicast with a low-latency service class enables video conferencing within an intranet. In this topology, CE1 and CE2 are the two customer routers. provider edge (PE) deviceA service provider device connected to VPN customer sites. type number, 4. destination-prefix MPLS VPNs are easier to manage and expand than conventional VPNs. However, a site can associate with only one VRF. 4. address-family ipv4 [multicast | unicast | vrf vrf-name], Router(config-router)# address-family ipv4 vrf vpn1. encoded in the update message, as specified in RFC 3107. At the backbone, VPN traffic is kept separate. The basic components of a Layer 3 VPN are the P, PE and CE routers. Label forwarding across the provider backbone is based on either dynamic label switching or traffic This task is accomplished by making forwarding. (Optional) Enables the BGP session to use a source address on the specified interface. The trace command can help isolate a trouble spot if two routers cannot communicate. neighbor interface the message. Inter-AS configurations supported in an MPLS VPN can include: Interprovider VPNMPLS VPNs that include two or more autonomous systems, connected by separate border edge routers. English. Translates the CE routing information into VPNv4 routes. the CSC-CE router sits on the edge of the customer carrier network. The MPLS VPN carrier supporting carrier feature is scalable. The This example shows how to configure and validate a basic MPLS-based Layer 3 VPN on routers or switches running Junos OS. It is used to CSC-CE routerA customer edge router is part of a customer network and interfaces to a CSC provider edge (PE) router. ULAs are easy to filter at site boundaries based on their scope. Loopback interfaces L2TP Access Concentrator. configure If an external route is received from another EIGRP autonomous system or a non-EIGRP network without a configured metric, the route will not be advertised to the CE router. both} A NAT is required only if two VPNs with overlapping address spaces want to communicate. destination-prefix First of all, our two customers are using overlapping address space. remote-as The following ip route command is supported when you configure static routes in MPLS environment: ip route destination-prefix mask interface next-hop-address. ipv6 ping command also can be used to test remote PE or CE reachability, but only IPv6 global addresses can be used (link-local addresses are not advertised beyond the link): Note that the The customer carrier connects these sites using a VPN service provided by the Enables label exchange for this address family to this neighbor in order to send to the local PE the remote PE IPv4 loopback with a label in order to set up an end-to-end LSP. http://www.cisco.com/cisco/web/support/index.html. mask Each table (for example, BGP IPv6, BGP IPv6 VPN) can be reviewed individually, as shown in the following example: IPv6 routing tables identify each routing protocol contributor to routable entries, as shown in the following example: From an IPv6 routing perspective, entries reachable over the MPLS backbone are listed as being indirectly connected, because MPLS is providing a Layer 2 tunnel mechanism. Heres what it is about: Above we have two customers connected to a service provider network. To configure a static route to an ASBR peer: This feature enables MPLS VPN-based backbone carriers to allow customer carriers to use a segment of the backbone network. The RD and RT values under a VRF must match on the re. Make sure that the route for CE2 is listed. standard | To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. tunnel P devices do not maintain any VPN routes. vrf-name] [unicast | CSC IPv6 over MPLS Configuration Example, Figure 7. Traffic at the edge and core of the network can then be differentiated into different classes by drop probability or delay. In IPv6 VPN, the peer address typically is an IPv4 address, in order to enable the BGP session to be transported over the IPv4-based core network. next-hop arguments when specifying static routes. How many virtual routing and forwarding instances are there for each VPN? If the P device is not IPv6 aware, it drops the packet. I really enjoy the practical way you present the material. This testing and implementation are to proof the scalability is the one important thing when design MPLS L3 VPN technology. neighbor provider network as follows: Route reflectors exchange VPN-IPv4 routes by using multihop, multiprotocol eBGP. Awesome! global. nsap-prefix} [route-map Adds an entry to the multiprotocol BGP neighbor table for peering with the Internet gateway. The figure below illustrates this scenario, in which Internet access is provided to the customer in the VRF named vrf1. The customer will run OSPF, EIGRP, BGP or any other routing protocol with the service provider, these routes can be shared with other sites of the customer. One of the CE routers advertises something to the PE router, this can be done through OSPF, EIGRP, BGP or any other routing protocol (static routing is also possible). An import list of route target extended communities is associated with each VRF. Predictable performance and policy implementation, Support for multiple levels of service in an MPLS VPN. One element of MPLS Layer 3 VPN design and deployment that is becoming more and more important is quality of service (QoS). label in the network reachability information for the prefix that it advertises to other PE devices. A customer data packet carries two levels of labels when traversing They solve the scalability issue of conventional IPSec VPNs deployed in a full-mesh model, reducing the configuration overhead while interconnecting many sites. To make a VPN service more accessible, customers of a service provider can design their own addressing plan, independent Labels. Broad range of Ethernet incremental bandwidth options, from 2 to 1,000 Mbps. neighbor messages. use multiprotocol iBGP to distribute VPNv4 routes. neighbor {ip-address | the routing table. service provider relays the data between the customer sites without customer To verify that the local and remote customer edge (CE) devices can communicate across the Multiprotocol Label Switching (MPLS) {ip-address | The MPLS VPN carrier supporting carrier feature is a flexible solution. components of MPLS VPN: Provider (P) MPLS VPNs are unique because ipv6-address} OSPFv3 PE-CE Extensions. Customer A and B each have two sites and you can see that they are using the same IP ranges. multicast | and Forwarding Instance for IPv6. play_arrow Collection of Log Files. Defines static route parameters for every PE-to-CE session. The router sends these messages at regular intervals. Centralized services including content and web hosting to a VPN. destination-prefix of a VPN community. address-family ipv6, 5. All rights reserved. The benefits of using BGP to distribute IPv4 routes and MPLS label routes are: BGP takes the place of an IGP and LDP in a VPN forwarding and routing instance (VRF) table. This example shows an MPLS VPN that is configured using BGP. ISP has two PE routers, PE1 and PE2 and a P router. At each customer site, one or more customer edge (CE) routers attach to one or more provider edge (PE) routers. The You can enter a route distinguisher (RD) in VPN-IPv4 and IPv4 routes and MPLS labels. that use standard IPv6 address prefixes. defines route target extended community attributes that a route must have for To find information about the features documented in this module, After the PE router learns the IP prefix, the PE converts it into a VPN-IPv4 prefix by combining it with an 8-byte route distinguisher (RD). Building VPNs in Layer 3 allows delivery of targeted services to a group of users represented by a VPN. Specifies that a communities attribute should be sent to a BGP neighbor. All devices in the core, including the provider edge (PE) devices, must be able to support Cisco Express Forwarding and MPLS Type-4 Route: Ethernet Segment Route aggregate-address Repeat this configuration in PE2 and P routers as well. and do not attach VPN labels to routed packets. update-source These IP packets must be received on a particular interface or A given site can be a member of multiple tunnel | You can use either of the following as an LDP: MPLS LDPSee the Implementing MPLS Label Distribution Protocol chapter in the MPLS Configuration Guide for Cisco 8000 Series Routers for configuration information. Virtual Private Networks, MPLS VPN Support for EIGRP Between PE and CE, Configuring Route Maps to Control the Distribution of MPLS Labels Between Routers in an MPLS VPN, Multi-VRF Selection Using Policy-Based Routing, MPLS VPN VRF Selection Based on a Source IP Address, MPLS VPN VRF Selection Using Policy-Based Routing, Prerequisites for MPLS Virtual Private Networks, Restrictions for MPLS Virtual Private Networks, Information About MPLS Virtual Private Networks, How an MPLS Virtual Private Network Works, How Virtual Routing and Forwarding Tables Work in an MPLS Virtual Private Network, How VPN Routing Information Is Distributed in an MPLS Virtual Private Network, Major Components of an MPLS Virtual Private Network, Benefits of an MPLS Virtual Private Network, How to Configure MPLS Virtual Private Networks, Assessing the Needs of MPLS Virtual Private Network Customers, Connecting the MPLS Virtual Private Network Customers, Defining VRFs on the PE Devices to Enable Customer Connectivity, Configuring VRF Interfaces on PE Devices for Each VPN Customer, Configuring Routing Protocols Between the PE and CE Devices, Configuring RIPv2 as the Routing Protocol Between the PE and CE Devices, Configuring Static Routes Between the PE and CE Devices, Verifying the Virtual Private Network Configuration, Verifying Connectivity Between MPLS Virtual Private Network Sites, Verifying IP Connectivity from CE Device to CE Device Across the MPLS Core, Verifying That the Local and Remote CE Devices Are in the PE Routing Table, Configuration Examples for MPLS Virtual Private Networks, Example: Configuring an MPLS Virtual Private Network Using RIP, Example: Configuring an MPLS Virtual Private Network Using Static Routes, Feature Information for MPLS Virtual Private Networks, Feature Information for MPLS Virtual Private Networks, BGP Distribution of VPN Routing Information. This increases the scalability of the providers core and ensures that no one device is a scalability bottleneck. Two popular QoS deployment models used by MPLS VPN service providers are to A VRF defines information and the VPN labels across the autonomous systems. IPv6 VPN over MPLS (6VPE) takes advantage of the coexistence between IPv6 and IPv4 by leveraging an existent Multiprotocol Label Switching (MPLS) IPv4 core network: The figure below illustrates the important aspects of the IPv6 Virtual Private Network (VPN) architecture. Between the links, the PE routers [unicast, 25. standard | At each customer site, one or more customer edge (CE) devices attach The device configuration filters ULA prefixes to prevent them from appearing in the public domain. The These components are network as-number, 7. 2 }. The global ipv6-address | to one or more provider edge (PE) devices. as well. (Optional) Places the device in address family configuration mode. The following Protocol (LDP). Labeled IPv4 routes to the provider edge (PE) devices (in the IPv6 over MPLS case) need to be advertised across ASBRs so that a complete labeled switch path is set up end to end. The following type This reflecting of learned IPv4 routes and MPLS labels is accomplished by enabling the ASBR to exchange IPv4 routes and uses a single, clearly defined routing protocol. When it receives IPv6 traffic from one customer site, the ingress provider edge (PE) device uses Multiprotocol Label Switching (MPLS) to tunnel IPv6 Virtual Private Network (VPN) packets over the backbone toward the egress PE device identified as the Border Gateway Protocol (BGP) next hop. vrf-name When the destination PE device receives the labeled packet, it pops the label and uses it to direct the packet ipv6-address} configuring IPv4 for the VRF, Enabling and Use the ip-address argument to verify that CE1 has a route to CE2. Based on routing information stored in the VRF IP routing table and VRF Cisco Express Forwarding table, packets are forwarded to their destination using MPLS. vrf-name] | A VPN data packets to the correct egress device. The following ip route vrf command is supported when you configure static routes in a MPLS VPN environment, and the next hop is in the global table on the CE side. The following ip route commands are not supported when you configure static routes in a MPLS VPN environment, the next hop is in the global table in the MPLS cloud within the core, and you enable load sharing where the destination can be reached through two next hops: ip route vrf destination-prefix mask next-hop1 global, ip route vrf destination-prefix mask next-hop2 global. both } management of route distinguishers across the network can present a problem. Integrated Network Service (VINES), DECnet, or Xerox Network Service (XNS) networks. (iBGP)within the IP domain, known as an autonomous system. vrf argument, exactly as in the case of VPNv4. The Carrier Supporting Carrier (CSC) feature provides Virtual Private Network (VPN) access to a customer service provider, so this service needs to exchange routes and send traffic over the Internet service provider (ISP) Multiprotocol Label Switching (MPLS) backbone. For Specifies the To configure MPLS Layer 3 VPNs, routers must support MPLS forwarding and Forwarding Information Base (FIB). Enters topology so that it can best serve MPLS VPN customers. Places the device in address family configuration mode for configuring routing sessions. ipv6-address | Switching (MPLS) provider core network. I like a lot the wording, examples and the explanations!!! How are MPLS Layer 3 VPN services deployed? For the latest caveats and feature information, Take a look at the picture below: Our PE2 router has learned the two VPNv4 routes, one for each customer. Another approach, the multiprotocol VRF, keeps a single VRF on the provider edge-customer edge (PE-CE) interface, and enables it for IPv4, IPv6, or both. remote-as destination-prefix Forwarding Information Base (TFIB). nexthop2. Configuring the multiautonomous-system backbone for IPv6 VPN consists of the following tasks: Perform this task to configure internal Border Gateway Protocol (iBGP) IPv6 Virtual Private Network (VPN) peering to a route reflector named RR1. (Optional) Places the device in address family configuration mode for configuring routing sessions. group of users represented by a VPN. The following ip route command is not supported when you configure static routes in an MPLS environment and enable load sharing where the next hop can be reached through two paths: The following ip route command is not supported when you configure static routes in an MPLS environment and enable load sharing where the destination can be reached through two next hops: ip route destination-prefix mask next-hop1, ip route destination-prefix mask next-hop2. Establishes peering with the specified neighbor or peer-group. MPLS is the combination of layer-3 routing and layer-2 switching because every network prefix is assigned a particular Label. Layer3 configures, deploys, and manages CPE at each of your network sites. ipv6-address | You MPLS TE builds a unidirectional tunnel from a source to a destination in the Migration for the end customer is simplified because there is no requirement to support MPLS on the CE router and no modifications are required to a customer's intranet. vrf-name] On Cisco devices, the most useful tool for troubleshooting the imposition path for IPv6 is the A VRF contains all the routes available to the site from the VPNs of which A VPN must give service Adds an entry to the multiprotocol BGP neighbor table, and provides peering with PE (PE-VPN). The following table provides release information about the feature or features described in this module. Redundancy and management - HSRP, VRRP, GLBP. show ip cef vrf Architecture for MPLS L3 VPN Deployment in Service Provider Network Ravi Kumar CV*, Dhanumjayulu C, Bagubali A and Bagadi KP School of Electronics Engineering, VIT University, India . Specifies or modifies the host name for the network server. Because the route distinguisher (RD) has no significance (the address is not part of any VPN), it is set to 0. vrf-name argument is the name assigned to a VRF. map-tag] [subnets ]. service guarantees that no prior action is necessary to establish communication The distinguisher values are checkpointed so that route distinguisher assignment to The Perform this task to identify the core network topology. in the same VRF: ip route vrf mask Identify the following to determine the number of routers and ports required: How many VPNs are required for each customer? are no longer usable. to routed packets. vrf the Internet gateway. ipv6 peer-group-name} The core routing enables connectivity among P and PE devices. A customer-site VRF contains all the routes available to the site from {ip-address | With this approach, a VRF is better defined as the set of tables, interfaces, and policies found at the PE, and is used by sites of a particular VPN connected to this PE. C. The label switch path must be available between the local and remote PE routers. IPv4 with label peering between ASBR1 and ASBR2. MPLS is the combination of layer-3 routing and layer-2 switching because every network prefix is assigned a particular Label. routerRouter in the core of the provider network. 3. A one-to-one relationship does not necessarily exist between customer sites and VPNs. 4. If an route distinguisher VPN labels are used to direct address family can each be enabled and configured separately. Centralized MPLS-TE can increase backhaul capacity by 50 percent when compared to L2 networks. MPLS L3VPN services are transported over MPLS LDP core. neighbor For example, a service that combines IP multicast with a low-latency service class enables video conferencing within an intranet. Informational [Page 1] RFC 2764 IP Based Virtual Private Networks February 2000. vrf route-target-ext-community, 9. unicast [vrf other public or private networks. For example, the following command is supported when the destination prefix is the CE devices Table of Contents. The labels for the IPv4 routes are route distinguisher (RD)A 64-bit value prepended to an IPv6 prefix to create a globally unique IPv6 VPN address. map-name]. Use the ping command to verify the connectivity from one CE router to another. n is the number of PEs. To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL: The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. The update message also includes path attributes and the lengths of both the usable and unusable paths. 3. For example, if the import Configures the Border Gateway Protocol (BGP) routing process. However, a site can associate with only one VRF. The update message includes any routes that This route can be distributed by the ingress PE (PE1) using multiprotocol internal Border Gateway Protocol (iBGP) (with the IPv6 address family configuration), so no specific configuration is needed on a per-VPN PE basis at the Internet gateway. A route distinguisher must be configured for the virtual routing and forwarding (VRF) instance, and Multiprotocol Label Switching You can configure the following routing protocols: To configure PE-to-CE routing sessions using BGP, perform this task. vrf commands are not supported when you configure static routes in an MPLS VPN environment, and the next hop and interface are Configure VRF Migration for the end customer is simplified. Configures an IPv6 address on the interface. address-family Then the user must configure cross-table routing to enable communication between the private domain (the VRF) and the public domain (the Internet). ipv6-address | The figure below illustrates interprovider scenarios in IPv6 VPN. The neighbor VPN routing information is distributed as follows: A PE router can learn an IP prefix from the following sources: The IP prefix is a member of the IPv4 address family. All rights reserved. activate, 15. For example, in VPN1, RR1 reflects to PE1 the VPN-IPv4 routes it learned and IPv4 routes and MPLS labels learned from ASBR1. For example, if the import list for a form of a label switched path (LSP), which is then used to forward traffic. update-source destination-prefix The objective of this document is to serve as a framework for related protocol development in order to develop the full set of specifications required for widespread deployment of interoperable VPN solutions. Multiprotocol Label Switching virtual private network (MPLS VPN) functionality is enabled at the edge of an MPLS network. the VPN membership of a customer site attached to a PE device. It uniquely identifies the customer address, even if the customer site is using globally nonunique (unregistered private) IP addresses. as-number, 6. tunnel | . Determine if you need MPLS VPN High Availability support. neighbor route distinguisher. Scalable bandwidth options from E1 to STM1. traceroute command. peer-group-name | ip route vrf USCom uses all 100 POPs to provide its Layer 3 MPLS VPN service. interface2 VPN route targets need to be configured for each VPN community member. under the interface, Configure VRF neighbor / next-hop1, ip route vrf Note that the peering is done over link-local addresses. multicast], 5. Use the nexthop1, ip route MPLS VPNs are easier The peer model enables the service provider and the customer to exchange Layer 3 routing information. mask ipv6-address | {network-number [mask The List the provider-provisioned MPLS VPN features supported by the Junos OS software. {ip-address | configuring IPv6 for the VRF. VPNs allow customers to continue to use their present address spaces without network address translation (NAT) by providing Edge routing takes place in two directions: routing between PE pairs and routing between a PE and a CE. import keyword imports routing information from the target VPN extended community. neighbor family configuration mode to configure a routing session using standard IPv4 migration path. RSVP is automatically enabled on interfaces on which MPLS-TE is configured. Perform these steps to configure L3VPN over RSVP-TE: Configure routing protocols in the coreTo configure routing protocols in the core, see the Routing Configuration Guide for Cisco 8000 Series Routers. Packet forwarding information is stored in the IP routing table and the Cisco Express Forwarding table for each VRF. interface1 Customer Carrier is an MPLS VPN service provider, the customer carrier can run BGP-LU and LDP in its core network. Routers exchange the following types of BGP messages: Open messagesAfter a router establishes a TCP connection with a neighboring router, the routers exchange open messages. A host within a private site that needs to access a public domain can do so through an IPv6 application proxy (such as a web proxy for accessing web pages), which accesses the public resource on the hosts behalf with a global routable address, or the host can use a public address of its own. Before you configure an MPLS VPN, you need to identify the core network topology so that it can best serve MPLS VPN customers. To enable IPv6 VPN interautonomous-system access in this scenario, the ISP needs to modify the configurations at the PE VPN and at the RR. ip route commands are not supported when you configure static routes in an MPLS environment and enable load sharing where the destination prefix-length {ipv6-address | The user can achieve better resilience and convergence for the same VRF, provided all of them participate in the same VPN. collectively called a VRF instance. When a new site is added to an MPLS VPN, only the service provider's edge router that provides services to the customer site needs to be updated. (IPv4) unicast routing table, A derived FIB MPLS virtual private networks (VPNs) provides the capability to deploy and administer scalable Layer 3 VPN backbone services to business customers. ip route vrf commands are supported when you configure static routes in an MPLS VPN environment, and the next hop and interface are in the network. Configures a static route from the default table to the VRF to allow inbound traffic to reach the VRF. MPLS-based VPNs are created in Layer 3 and are based on the peer model. In this lesson we'll take a look how to configure a MPLS Layer 3 VPN PE-CE scenario. MPLS Layer 3 VPN 1. Customer's MPLS Layer 3 VPNs offer an extremely scalable VPN architecture that can scale to thousands of customer sites and VPNs. MPLS Traffic Engineering Resource Reservation Protocol (RSVP). vrf-name. destination-prefix network. Label distribution can be performed by IGP (IS-IS or OSPF) or route-target {import | A BGP update message carries one or more NLRI prefixes and the attributes of a route for the NLRI prefixes; the route attributes include a BGP next hop gateway address and community values. Security is provided in the following areas: At the edge of a provider network, ensuring packets received from a customer are placed on the correct VPN. network ip-address, redistribute assigns a Type 1 route distinguisher to the VRF using the following format: ip-address:number. VPN route that carries any of those route target extended communitiesA, B, or next-hop-address. This section takes you mask route distinguisher for each router, you must ensure that each router has a of VPN and Interior Gateway Protocol (IGP) routes between PE devices and provider (P) devices in a core network. MPLS: Layer 3 VPNs Configuration Guide, Cisco IOS Release 15M&T, View with Adobe Reader on a variety of devices. next-hop-address (This command is supported when the next hop and interface are in the core.). Perform this task to configure IPv4 and label internal Border Gateway Protocol (iBGP) peering to a route reflector named RR1. ebgp-multihop [ttl], 7. redistribute connected protocol [process-id]] | [list [access-list-name | ip route vrf You can also transport MPLS L3VPN services using segment routing in the core. by means of an MPLS provider core network. The following ip route vrf commands are not supported when you configure static routes in an MPLS VPN environment, and the next hop and interface are in the same VRF: ip route vrf vrf-name destination-prefix mask next-hop1 vrf-name destination-prefix mask next-hop1, ip route vrf vrf-name destination-prefix mask next-hop2. VRF-lite interfaces must be Layer 3 interface and this interface cannot MPLS VPN, only the edge router of the service provider that provides services The first AS in the list is closest to the local router; the last AS in the list is farthest from the local router and usually A provider edge (PE) device binds a label to each customer prefix learned from a customer edge (CE) device and includes the Cisco Express Forwarding Configuration Guide, Border Gateway Protocol (BGP) load sharing, Load Sharing MPLS VPN Traffic module in the The peer model requires a customer site to peer with only one provider edge (PE) device as opposed For example, a service that combines The tasks listed below helps to identify the core network topology. ipv6-address | send-label, 19. traceroute command are forwarded to the egress PE using the received label stack. When implementing MPLS Layer 3 VPNs with customers running OSPF as the CEPE routing protocol, the service provider MPLS backbone looks like what to the CE routers? Better utilization of existing bandwidth Run VoIP and data applications over the same circuits. remote-as mask can begin at one customer site and traverse different VPN service provider backbones before arriving at another site of the Verify if the BGP state is established, and if the Remote AS and local AS displays the same value (2001 in this example): Verify if all the IP addresses are learnt on PE1 from PE2: You must verify these A separate set of routing and Cisco Express Forwarding tables is maintained for each VRF. The following points need to be considered: Routing table size, which includes the size of virtual routing and forwarding (VRF) tables and BGP tables, Number of BGP sessions, which grows as a square number of PEs. ipv6-address} unicast [vrf These variations of the commands are not supported in software releases that support the Tag with a PE device. external 1 | A. the backbone (Area 0) B. an external routing domain C. a superbackbone that is transparent to the CE OSPF routers interface an The connectionless architecture allows the creation of VPNs in Layer 3, eliminating the need for tunnels or VCs. I look forward for the config part. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. ipv6-address | This configuration is for the RR1 loopback. 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