- EIGRP
- IPv6 Routing: EIGRP Support
- EIGRP MIB
- EIGRP MPLS VPN PE-CE Site of Origin
- EIGRP Nonstop Forwarding Awareness
- EIGRP Nonstop Forwarding
- EIGRP IPv6 NSF/GR
- EIGRP Prefix Limit Support
- EIGRP Support for Route Map Filtering
- EIGRP Route Tag Enhancements
- BFD Support for EIGRP IPv6
- EIGRP Loop-Free Alternate Fast Reroute
- Add Path Support in EIGRP
- EIGRP Wide Metrics
- EIGRP/SAF HMAC-SHA-256 Authentication
- IP EIGRP Route Authentication
- EIGRP IPv6 VRF-Lite
- EIGRP Stub Routing
- EIGRP Support for 6PE/6VPE
- EIGRP Over the Top
- EIGRP OTP VRF Support
- EIGRP Classic to Named Mode Conversion
- EIGRP Scale for DMVPN
- EIGRP IWAN Simplification
- Prerequisites for EIGRP OTP VRF Support
- Restrictions for EIGRP OTP VRF Support
- Information About EIGRP OTP VRF Support
- How to Configure EIGRP OTP VRF Support
- Configuration Examples for EIGRP OTP VRF Support
- Additional References for EIGRP OTP VRF Support
- Feature Information for Configuring EIGRP OTP VRF Support
EIGRP OTP VRF Support
The EIGRP OTP VRF support feature extends VPN routing and forwarding (VRF) support to the EIGRP OTP feature thereby retaining and carrying VRF information over WAN.
- Prerequisites for EIGRP OTP VRF Support
- Restrictions for EIGRP OTP VRF Support
- Information About EIGRP OTP VRF Support
- How to Configure EIGRP OTP VRF Support
- Configuration Examples for EIGRP OTP VRF Support
- Additional References for EIGRP OTP VRF Support
- Feature Information for Configuring EIGRP OTP VRF Support
Prerequisites for EIGRP OTP VRF Support
The EIGRP Over the Top feature must be configured.
Restrictions for EIGRP OTP VRF Support
Information About EIGRP OTP VRF Support
Overview of EIGRP OTP VRF Support
The EIGRP Over the Top is a WAN solution with EIGRP in control plane and LISP in data plane, in which route distribution between two EIGRP customer-edge devices is performed using EIGRP protocol. LISP encapsulates the data that is sent over WAN. To support VRF functionality, the routes from each VRF must be carried over the control plane and installed in the correct VRF tables in the CE devices and EIGRP Route Reflector (E-RR).
How EIGRP OTP VRF Support Works
A CE device supports multiple VRFs on a LAN. On a WAN, the WAN interface in the default VRF and the CE device forms a remote EIGRP neighborship with another CE or E-RR device. The neighbors are formed in a single EIGRP process. One EIGRP process handles multiple, distinct neighbor formations in various VRFs on the LAN side and at the same time, also forms a neighbor on the WAN side with an OTP peer. The receiving peer picks routes that are applicable for the topologies that are present on the receiving peer. Routes from any other topologies are dropped.
Various routes learnt from peers in different VRFs are updated in the respective topologies on the CE and are transported to the OTP peer with the topology information for each route. Each topology represents a configured VRF on the device.
Each topology is associated with a unique ID, called the TID (Topology ID). The TID identifies the topology across various remote customer sites as the VRF name could be different on each CE device. For the CE devices to exchange the right information, the TID must be the same on all CEs.
The LISP Id (LISP Instance ID) also is mapped to a VRF and TID. As LISP carries different VRF packets using different virtual LISP interfaces, the LISP ID per VRF must be unique and must be same across the CE devices for packet delivery.
Use the topology command to configure a unique topology ID on customer site.
Data Encapsulation
Data encapsulation is achieved using LISP and is configured using the same topology command. Each VRF is associated with a LISP virtual interface. Data packets from one VRF will be encapsulated between the CE devices per VRF.
Each CE device is the edge device for a customer site, having various VRFs in a network. When customer sites connect via EIGRP OTP, each CE device is a neighbor to another CE device. In case of E-RR deployment, the CE s neighbors with the E-RR. The routes in a VRF in one customer site are carried to its peer and updated in the appropriate peer VRF table. If routes are received from a particular topology is absent in a peer, the peer drops the routes.
The E-RR reflects all topologies that are configured on the E-RR. Routes from topologies that are absent on the E-RR are not reflected. This is the reason that the E-RR is expected to have a super set of all VRFs present in the network.
Interfaces and Topology Command
When the topology command is used, all the interfaces under that VRF are enabled with EIGRP, thereby forming neighbors on all interfaces under a VRF. However, there may be interfaces on which EIGRP should not be enabled. To disable the formation of peers on such interfaces, use the topo-interface command and disable the interface on which EIGRP must not be enabled via passive-interface command.
Differences between EIGRP OTP Feature and EIGRP OTP VRF Support Feature
EIGRP OTP Feature |
EIGRP OTP VRF Support Feature |
---|---|
Supports the default VRF only. |
Multiple VRFs can be configured. Each VRF is considered as a topology and the topology related information is carried across associated with a TID (topology ID). |
Neighbors are formed on only those interfaces that are configured with the network command. |
Neighbors are formed across all interfaces in a particular VRF configured with the topology command. |
The network command is required on the WAN interface to form an OTP neighbor. |
The network command is not required. |
How to Configure EIGRP OTP VRF Support
Configuring EIGRP OTP VRF Support on a CE Device
You must enable the EIGRP OTP VRF Support feature on all customer edge (CE) devices in the network so that the CEs know how to reach the Enhanced Interior Gateway Routing Protocol (EIGRP) Route Reflector configured in the network. Perform the following task to configure the EIGRP OTP VRF Support feature on a CE device.
1.
enable
2.
configure terminal
3.
router eigrp
virtual-name
4.
address-family ipv4 autonomous-system
as-number
5.
topology vrf
vrf-name
tid
number
lisp-instance-id
number
6.
topo-interface
interface-name interface-number
7.
passive-interface
8.
exit
9.
exit
10. neighbor{ip-address | ipv6-address} interface-type interface-number [remote [lisp-encap [lisp-id]]]
11.
end
12.
show ip eigrp topology
DETAILED STEPS
The following is a sample output from the show ip eigrp topology command.
Device# show ip eigrp topology EIGRP-IPv4 VR(otp) Topology Table for AS(1)/ID(10.0.0.11) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 10.0.0.0/24, 1 successors, FD is 131072000 via Connected, Ethernet0/1 EIGRP-IPv4 VR(otp) Topology Table for AS(1)/ID(10.0.0.11) Topology(red) TID(20) VRF(red) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 21.0.0.0/24, 1 successors, FD is 12161609142 via 20.0.0.11 (12161609142/12096073142), Ethernet0/1 P 1.11.11.11/32, 1 successors, FD is 12161691062 via 20.0.0.11 (12161691062/12096155062), Ethernet0/1 P 11.0.0.0/24, 1 successors, FD is 131072000 via Connected, Ethernet0/0 P 1.1.1.1/32, 1 successors, FD is 131153920 via 11.0.0.10 (131153920/163840), Ethernet0/0 EIGRP-IPv4 VR(otp) Topology Table for AS(1)/ID(10.0.0.11) Topology(green) TID(30) VRF(green) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 2.222.222.222/32, 1 successors, FD is 12161691062 via 30.0.0.11 (12161691062/12096155062), Ethernet0/1 P 12.0.0.0/24, 1 successors, FD is 131072000 via Connected, Ethernet0/2 P 31.0.0.0/24, 1 successors, FD is 12161609142 via 30.0.0.11 (12161609142/12096073142), Ethernet0/1 P 11.22.11.22/32, 1 successors, FD is 12161691062 via 30.0.0.11 (12161691062/12096155062), Ethernet0/1 P 2.2.2.2/32, 1 successors, FD is 131153920 via 12.0.0.10 (131153920/163840), Ethernet0/2 P 22.0.0.0/24, 1 successors, FD is 12161609142 via 20.0.0.11 (12161609142/12096073142), Ethernet0/1 P 2.22.22.22/32, 1 successors, FD is 12161691062 via 20.0.0.11 (12161691062/12096155062), Ethernet0/1 EIGRP-IPv4 VR(otp) Topology Table for AS(1)/ID(10.0.0.11) Topology(blue) TID(40) VRF(blue) Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - reply Status, s - sia Status P 13.0.0.0/24, 1 successors, FD is 131072000 via Connected, Ethernet0/3 P 32.0.0.0/24, 1 successors, FD is 12161609142 via 30.0.0.11 (12161609142/12096073142), Ethernet0/1 P 3.33.33.33/32, 1 successors, FD is 12161691062 via 30.0.0.11 (12161691062/12096155062), Ethernet0/1 P 3.3.3.3/32, 1 successors, FD is 131153920 via 13.0.0.10 (131153920/163840), Ethernet0/3
Configuring EIGRP OTP VRF Support on EIGRP Route Reflectors
Perform this task to configure a customer edge (CE) device in a network to function as an Enhanced Interior Gateway Routing Protocol (EIGRP) Route Reflector.
1.
enable
2.
configure terminal
3.
router eigrp
virtual-name
4.
address-family ipv4 autonomous-system
as-number
5.
topology vrf
vrf-name
tid
number
lisp-instance-id
number
6.
exit
7.
remote-neighbors source
interface-type interface-number
unicast-listen lisp-encap
LISP-instance-ID
8.
end
DETAILED STEPS
Configuration Examples for EIGRP OTP VRF Support
Example: Configuring EIGRP OTP VRF Support on a CE Device
Router> enable Router# configure terminal Device(config)# router eigrp test Device(config-router)# address-family ipv4 autonomous-system 10 Device((config-router-af)# topology vrf vrf1 tid 10 lisp-instance-id 122 Device(config-router-af-topology)# topo-interface GigabitEthernet0/0/0 Device(config-router-af-topology-interface)# passive-interface Device(config-router-af-topology-interface)# exit Device((config-router-af-topology)# exit Device(config-router-af)# neighbor 10.0.0.1 ATM0/3/0 remote lisp-encap 122 Device(config-router-af)# end
Example: Configuring EIGRP OTP VRF Support on EIGRP Route Reflectors
Device> enable Device# configure terminal Device(config)# router eigrp test Device(config-router)# address-family ipv4 autonomous-system 10 Device(config-router-af)# topology vrf vrf1 tid 10 lisp-instance-id 122 Device(config-router-af-topology)# exit Device(config-router-af)# remote-neighbors source ATM0/3/0 unicast-listen lisp-encap 122 Device(config-router-af)# end
Additional References for EIGRP OTP VRF Support
Related Documents
Related Topic |
Document Title |
---|---|
Cisco IOS commands |
|
IP Routing: EIGRP commands |
Technical Assistance
Description |
Link |
---|---|
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Feature Information for Configuring EIGRP OTP VRF Support
The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.
Feature Name |
Releases |
Feature Information |
---|---|---|
EIGRP OTP VRF Support |
Cisco IOS XE Release 3.15S |
The EIGRP OTP VRF support feature extends VPN routing and forwarding (VRF) support to the EIGRP OTP feature thereby retaining and carrying VRF information over WAN. The following commands were introduced or modified: neighbors, remote-neighbors, show ip eigrp topology, show ip route vrf, topology. |