- Read Me First
- Configuring OSPF
- IPv6 Routing: OSPFv3
- IPv6 Routing: OSPFv3 Authentication Support with IPsec
- OSPFv2 Cryptographic Authentication
- OSPFv3 External Path Preference Option
- OSPFv3 Graceful Restart
- Graceful Shutdown Support for OSPFv3
- OSPF Stub Router Advertisement
- OSPF Update Packet-Pacing Configurable Timers
- OSPF Sham-Link Support for MPLS VPN
- OSPF Support for Multi-VRF on CE Routers
- OSPFv2 Multiarea Adjacency
- OSPFv2 Autoroute Exclude
- OSPFv3 Address Families
- OSPFv3 Authentication Trailer
- Autoroute Announce and Forwarding Adjacencies For OSPFv3
- OSPFv3 Autoroute Exclude
- OSPFv2 IP FRR Local Microloop Avoidance
- OSPFv2-OSPF Live-Live
- OSPF Forwarding Address Suppression in Translated Type-5 LSAs
- OSPF Inbound Filtering Using Route Maps with a Distribute List
- OSPFv3 Route Filtering Using Distribute-List
- OSPF Shortest Path First Throttling
- OSPF Support for Fast Hello Packets
- OSPF Incremental SPF
- OSPF Limit on Number of Redistributed Routes
- OSPFv3 Fast Convergence: LSA and SPF Throttling
- OSPFv3 Max-Metric Router LSA
- OSPF Link-State Advertisement Throttling
- OSPF Support for Unlimited Software VRFs per PE Router
- OSPF Area Transit Capability
- OSPF Per-Interface Link-Local Signaling
- OSPF Link-State Database Overload Protection
- OSPF MIB Support of RFC 1850 and Latest Extensions
- OSPF Enhanced Traffic Statistics
- TTL Security Support for OSPFv3 on IPv6
- Configuring OSPF TTL Security Check and OSPF Graceful Shutdown
- OSPF Sham-Link MIB Support
- OSPF SNMP ifIndex Value for Interface ID in Data Fields
- OSPFv2 Local RIB
- OSPF Support for Forwarding Adjacencies over MPLS TE Tunnels
- Enabling OSPFv2 on an Interface Basis
- OSPF Nonstop Routing
- OSPFv3 NSR
- OSPFv2 Loop-Free Alternate Fast Reroute
- OSPFv3 MIB
- Prefix Suppression Support for OSPFv3
- OSPFv3 VRF-Lite/PE-CE
- OSPFv3 ABR Type 3 LSA Filtering
- OSPFv3 Demand Circuit Ignore
- OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute
- OSPFv3 Multiarea Adjacency
- OSPF Limiting Adjacency Formations
- Finding Feature Information
- Information About OSPF Support for Multi-VRF on CE Routers
- How to Configure OSPF Support for Multi-VRF on CE Routers
- Configuration Example for OSPF Support for Multi-VRF on CE Routers
- Additional References
- Feature Information for OSPF Support for Multi-VRF on CE Routers
- Glossary
OSPF Support for Multi-VRF on CE Routers
The OSPF Support for Multi-VRF on CE Routers feature provides the capability to suppress provider edge (PE) checks that are needed to prevent loops when the PE is performing a mutual redistribution of packets between the OSPF and BGP protocols. When VPN routing and forwarding (VRF) is used on a router that is not a PE (that is, one that is not running BGP), the checks can be turned off to allow for correct population of the VRF routing table with routes to IP prefixes.
OSPF multi-VRF allows you to split the router into multiple virtual routers, where each router contains its own set of interfaces, routing table, and forwarding table.
- Finding Feature Information
- Information About OSPF Support for Multi-VRF on CE Routers
- How to Configure OSPF Support for Multi-VRF on CE Routers
- Configuration Example for OSPF Support for Multi-VRF on CE Routers
- Additional References
- Feature Information for OSPF Support for Multi-VRF on CE Routers
- Glossary
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table.
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.
Information About OSPF Support for Multi-VRF on CE Routers
The OSPF Support for Multi-VRF on CE Routers feature provides the capability to suppress provider edge (PE) checks that are needed to prevent loops when the PE is performing a mutual redistribution of packets between the OSPF and BGP protocols. When VPN routing and forwarding (VRF) is used on a router that is not a PE (that is, one that is not running BGP), the checks can be turned off to allow for correct population of the VRF routing table with routes to IP prefixes.
OSPF multi-VRF allows you to split the router into multiple virtual routers, where each router contains its own set of interfaces, routing table, and forwarding table. OSPF multi-VRF gives you the ability to segment parts of your network and configure those segments to perform specific functions, yet still maintain correct routing information.
How to Configure OSPF Support for Multi-VRF on CE Routers
Configuring the Multi-VRF Capability for OSPF Routing
CEF must be running on the network.
1.
enable
2.
show
ip
ospf
[process-id
3.
configure
terminal
4.
vpdn-
group
name
5.
exit
6.
resource-pool
profile
vpdn
name
7.
vpdn
group
name
8.
vpn
vrf
vrf-name
| id vpn-id
9.
exit
10.
router
ospf
process-id
[vrf vpn-name]
11.
capability
vrf-lite
DETAILED STEPS
Verifying the OSPF Multi-VRF Configuration
No specific debug or show commands are associated with this feature. You can verify the success of the OSPF multi-VRF configuration by using the show ip ospf process-id] command to verify that the router is not connected to the VPN backbone.
This output from the show ip ospf processcommand indicates that the PE router is currently connected to the backbone.
Router# show ip ospf 12 Routing Process "ospf 12" with ID 172.16.1.1 and Domain ID 0.0.0.12 Supports only single TOS(TOS0) routes Supports opaque LSA Connected to MPLS VPN Superbackbone SPF schedule delay 5 secs, Hold time between two SPFs 10 secs Minimum LSA interval 5 secs. Minimum LSA arrival 1 secs Number of external LSA 0. Checksum Sum 0x0 Number of opaque AS LSA 0. Checksum Sum 0x0 Number of DCbitless external and opaque AS LSA 0 Number of DoNotAge external and opaque AS LSA 0 Number of areas in this router is 0. 0 normal 0 stub 0 nssa External flood list length 0
When the OSPF VRF process is configured with the capability vrf-lite command under the router ospf command, the "Connected to MPLS VPN Superbackbone" line will not be present in the display.
Configuration Example for OSPF Support for Multi-VRF on CE Routers
Example Configuring the Multi-VRF Capability
This example shows a basic OSPF network with a VRF named grc configured. The capability vrf-lite command is entered to suppress the PE checks.
! ip cef ip vrf grc rd 1:1 interface Serial2/0/0 ip vrf forwarding grc ip address 192.168.1.1 255.255.255.252 ! interface Serial3/0/0 ip vrf forwarding grc ip address 192.168.2.1 255.255.255.252 ... ! router ospf 9000 vrf grc log-adjacency-changes capability vrf-lite redistribute rip metric 1 subnets network 192.168.1.0 0.0.0.255 area 0 ! router rip address-family ipv4 vrf grc redistribute ospf 9000 vrf grc network 192.168.2.0 no auto-summary end Device# show ip route vrf grc Routing Table: grc Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route Gateway of last resort is not set O IA 192.168.192.0/24 [110/138] via 192.168.1.13, 00:06:08, Serial2/0/0 [110/138] via 192.168.1.9, 00:06:08, Serial3/0/0 O IA 192.168.242.0/24 [110/74] via 192.168.1.13, 00:06:08, Serial2/0/0 O IA 192.168.193.0/24 [110/148] via 192.168.1.13, 00:06:08, Serial2/0/0 [110/148] via 192.168.1.9, 00:06:08, Serial3/0/0 O IA 192.168.128.0/24 [110/74] via 192.168.1.9, 00:06:08, Serial3/0/0 O IA 192.168.129.0/24 [110/84] via 192.168.1.9, 00:06:08, Serial3/0/0 O IA 192.168.130.0/24 [110/84] via 192.168.1.9, 00:06:08, Serial3/0/0 172.16.0.0/24 is subnetted, 2 subnets O E2 172.16.9.0 [110/5] via 192.168.1.13, 00:06:08, Serial2/0/0 O E2 172.16.10.0 [110/5] via 192.168.1.13, 00:06:08, Serial2/0/0 O IA 192.168.131.0/24 [110/94] via 192.168.1.9, 00:06:20, Serial3/0/0 192.168.1.0/30 is subnetted, 4 subnets C 192.168.1.8 is directly connected, Serial3/0/0 C 192.168.1.12 is directly connected, Serial2/0/0 O 192.168.1.0 [110/128] via 192.168.1.9, 00:06:20, Serial3/0/0 O 192.168.1.4 [110/128] via 192.168.1.13, 00:06:20, Serial2/0/0
Additional References
For additional information related to OSPF support for multi-VRF on CE routers, see the following references.
Related Documents
Related Topic |
Document Title |
---|---|
Configuring OSPF |
"Configuring OSPF" |
Multiprotocol Label Switching (MPLS) |
Cisco IOS XE Multiprotocol Label Switching Configuration Guide, Release 2 |
OSPF commands |
Cisco IOS IP Routing: OSPF Command Reference |
Cisco IOS master command list, all releases |
Standards
Standard |
Title |
---|---|
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature. |
-- |
MIBs
MIB |
MIBs Link |
---|---|
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature. |
To locate and download MIBs for selected platforms, Cisco IOS XE software releases , and feature sets, use Cisco MIB Locator found at the following URL: |
RFCs
RFC |
Title |
---|---|
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature. |
-- |
Technical Assistance
Description |
Link |
---|---|
The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password. |
Feature Information for OSPF Support for Multi-VRF on CE Routers
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.Glossary
CE Router --Customer Edge router, an edge router in the C network, defined as a C router which attaches directly to a P router.
C Network --Customer (enterprise or service provider) network.
C Router --Customer router, a router in the C network.
LSA --link-state advertisement . Broadcast packet used by link-state protocols that contains information about neighbors and path costs. LSAs are used by the receiving routers to maintain their routing tables.
PE Router --Provider Edge router, an edge router in the P network, defined as a P router which attaches directly to a C router.
P Network --MPLS-capable service provider core network. P routers perform MPLS.
P Router --Provider router, a router in the P network.
SPF --shortest path first. A routing algorithm that iterates on length of path to determine a shortest-path spanning tree.
VPN --Virtual Private Network. Enables IP traffic to travel securely over a public TCP/IP network by encrypting all traffic from one network to another.
VRF --VPN Routing and Forwarding.