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Configuring Easy Virtual Network Shared Services

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Configuring Easy Virtual Network Shared Services

Last Updated: May 4, 2012

This module describes how to use route replication and redistribution to share services in an Easy Virtual Network (EVN).

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see 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 at the end of this document.

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.

Prerequisites for Virtual IP Network Shared Services

  • Read the Overview of Easy Virtual Networks section .
  • Implement Easy Virtual Network based on the Configuring Easy Virtual Networks section.

Restrictions for Virtual IP Network Shared Services

Route replication is supported for static, EIGRP, and OSPF routes. It is not possible to replicate routes to and from BGP, but that is not an issue because the BGP import and export method of copying routes between VRFs is available in a virtual network.

Information About Easy Virtual Network Shared Services

Shared Services in an Easy Virtual Network

There are some common services (such as database servers and application servers) that multiple virtual networks need to access. Shared services are beneficial because:

  • Services are usually not duplicated for each group.
  • Sharing services is economical.
  • Sharing services is efficient and manageable.
  • Policies can be centrally deployed.

To achieve route separation, you could replicate the service, either physically or virtually, one service for each virtual network. However, that solution might not be cost effective or feasible. For a router that supports EVN, the solution is to perform route replication and route redistribution.

Route replication allows shared services because when routes are replicated between virtual networks, clients who reside in one virtual network can reach prefixes that exist in another virtual network.

A shared services approach works best for DNS, DHCP, and corporate communications. It is not a solution for sharing access to an internet gateway.

Easy Virtual Network Makes Shared Services Easier Than VRF-Lite Does

Sharing servers in VRF-Lite requires route distinguishers (RDs), route targets with importing and exporting, and configuring BGP.

In an EVN environment, shared services are achieved with route replication, which is a simple deployment. Route replication requires no BGP, no RD, no route targets, and no import or export.

In summary, the BGP import and export method of copying routes between VRFs works with both VRF-Lite and EVN. However, route replication is the simpler alternative to enable sharing of common services across multiple virtual networks.

Route Replication Process in EVN

With shared service, clients and servers are located in different virtual networks. To achieve connectivity between clients and servers, routes must be exchanged among virtual networks. Such route exchanges among VRFs are accomplished in two different ways, depending on whether VRF-Lite or EVN is implemented:

  • In VRF-Lite, route leaking is achieved, via BGP, by using the route import/export feature.
  • In EVN, route replication is supported directly by the RIB; there is no dependency on BGP. After routes are replicated from a different virtual network, those routes are propagated across each virtual network through existing redistribution into the Interior Gateway Protocol (IGP).

In the following route replication scenario, a router has two VRFs named Services and User-A. OSPF is configured:

router ospf 99 vrf services
 network 126.1.0.0 0.0.255.255 area 0
!
router ospf 98 vrf user-a
 network 126.1.0.0 0.0.255.255 area 0

Furthermore, route replication is configured for VRF User-A:

vrf definition user-a
 !
 address-family ipv4
 route-replicate from vrf services unicast ospf 99
 exit-address-family

In the scenario, the following RIB for the VRF Services contains four routes, three of which are replicated to the RIB for VRF User-A. Route replication creates a link to the source RIB, as shown in the figure below.



Configuring route replication allows mutual redistribution between virtual IP networks. In the case of shared services, you would configure route replication within the VRF that needs access to the shared services. Within each route-replicate command, you can optionally filter out routes with a route map to prevent a routing loop. That is, you do not want to redistribute routes back into the original routing protocol. You do not want a native route to show up as a replicated route.

Where to Implement Route Replication

We recommend implementing route replication on the router as close to the shared service as possible. Ideally, the router that is directly connected to the server subnet should be used, to eliminate the need to redistribute the host prefixes on the server VRF, and thereby avoid a potential routing loop.

Route Replication Behavior for EVN

This section describes the behavior of route replication for EVN, which differs from the behavior for Multi-Topology Routing. In the EVN environment:

  • The route-replicate command is accepted only under the address-family ipv4 command, which is configured under the vrf definition command.
  • The route-replicate command replicates routes into the base topology within the specified address family.
  • If all is specified as a source protocol, only one route-replicate command is allowed per VRF for a given destination topology.
  • The no route-replicate command is allowed to exclude a source protocol.
  • If all is specified as a source protocol, then connected routes are replicated (unlike in the Multi-Topology Routing version of the route-replicate command).
  • A replicated route inherits the administrative distance and source protocol of the source route.

Route Preference Rules After Route Replication in EVN

If a route is replicated, the following rules determine route preference:

  1. If two routes are owned by the same protocol (for example, both are EIGRP routes), and both routes have the same source VRF and one of the routes is NOT replicated, then the non-replicated route is preferred.

If the above rule does not apply, the following rules determine route preference, in this order:

  1. Prefer the route with smaller administrative distance.
  2. Prefer the route with smaller default administrative distance.
  3. Prefer a non-replicated route over a replicated route.
  4. Compare original vrf-names. Prefer the route with the lexicographically smaller vrf-name.
  5. Compare original sub-address-families: Prefer unicast over multicast.
  6. Prefer the oldest route.

How to Share Services Using Easy Virtual Network

Configuring Route Replication to Share Services in EVN

Perform this task to replicate routes from one VRF to another. The examples within this task table are based on the figure below.



In this particular task, routes from VRF SERVICES are replicated to both VRF RED and VRF GREEN, and VRF RED and VRF GREEN are not allowed to share routes between them. In order to allow bidirectional traffic, routes from VRF RED and VRF GREEN are also replicated to VRF SERVICES.


Note


In a real EVN environment, there would also be route replication between VRF SERVICES and a third VRF, and maybe more VRFs. Such replication is left out of the following configuration task for the sake of brevity.
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    vrf definition vrf-name

4.    vnet tag number

5.    description string

6.    address-family ipv4

7.    exit

8.    exit

9.    vrf definition vrf-name

10.    vnet tag number

11.    description string

12.    address-family ipv4

13.    exit

14.    exit

15.    interface type number

16.    vrf forwarding vrf-name

17.    ip address ip-address mask

18.    no shutdown

19.    exit

20.    router ospf process-id vrf vrf-name

21.    network ip-address wildcard-mask area area-id

22.    exit

23.    router ospf process-id [vrf vrf-name]

24.    network ip-address wildcard-mask area area-id

25.    exit

26.    vrf definition vrf-name

27.    address-family ipv4

28.    route-replicate from [vrf vrf-name] {multicast| unicast} {all| protocol-name} [route-map map-tag]

29.    exit

30.    exit

31.    vrf definition vrf-name

32.    address-family ipv4

33.    route-replicate from [vrf vrf-name] {multicast| unicast} {all| protocol-name} [route-map map-tag]

34.    end

35.    show ip route vrf vrf-name


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
vrf definition vrf-name


Example:

Router(config)# vrf definition SERVICES

 

Defines a VRF.

 
Step 4
vnet tag number


Example:

Router(config-vrf)# vnet tag 100

 

Specifies the global, numeric tag for the VRF.

  • The same tag number must be configured for the same VRF on each edge and trunk interface.
 
Step 5
description string


Example:

Router(config-vrf)# description shared services

 

(Optional) Describes a VRF to help the network administrator looking at the configuration file.

 
Step 6
address-family ipv4


Example:

Router(config-vrf)# address-family ipv4

 

Enters address family configuration mode to configure a routing session using standard IPv4 address prefixes.

 
Step 7
exit


Example:

Router(config-vrf-af)# exit

 

Exits to the next higher configuration mode.

 
Step 8
exit


Example:

Router(config-vrf)# exit

 

Exits to the next higher configuration mode.

 
Step 9
vrf definition vrf-name


Example:

Router(config)# vrf definition RED

 

Defines a VRF.

 
Step 10
vnet tag number


Example:

Router(config-vrf)# vnet tag 200

 

Specifies the global, numeric tag for the VRF.

  • The same tag number must be configured for the same VRF on each edge and trunk interface.
 
Step 11
description string


Example:

Router(config-vrf)# description user of services

 

(Optional) Describes a VRF to help the network administrator looking at the configuration file.

 
Step 12
address-family ipv4


Example:

Router(config-vrf)# address-family ipv4

 

Enters address family configuration mode to configure a routing session using standard IP Version 4 address prefixes.

 
Step 13
exit


Example:

Router(config-vrf-af)# exit

 

Exits to the next highest configuration mode.

 
Step 14
exit


Example:

Router(config-vrf)# exit

 

Exits to the next highest configuration mode.

 
Step 15
interface type number


Example:

Router(config)# interface gigabitethernet 0/0/0

 

Configures an interface type and number.

 
Step 16
vrf forwarding vrf-name


Example:

Router(config-if)# vrf forwarding SERVICES

 

Associates a VRF instance with an interface.

 
Step 17
ip address ip-address mask


Example:

Router(config-if)# ip address 192.168.1.3 255.255.255.0

 

Sets a primary IP address for an interface.

 
Step 18
no shutdown


Example:

Router(config-if)# no shutdown

 

Restarts an interface.

 
Step 19
exit


Example:

Router(config-vrf)# exit

 

Exits to the next highest configuration mode.

 
Step 20
router ospf process-id vrf vrf-name


Example:

Router(config)# router ospf 99 vrf SERVICES

 

Configures an OSPF routing process.

  • This example uses OSPF; EIGRP is also available.
 
Step 21
network ip-address wildcard-mask area area-id


Example:

Router(config-router)# network 192.168.1.0 0.0.0.255 area 0

 

Defines the interfaces on which OSPF runs and the area ID for those interfaces.

 
Step 22
exit


Example:

Router(config-router)# exit

 

Exits to the next higher configuration mode.

 
Step 23
router ospf process-id [vrf vrf-name]


Example:

Router(config)# router ospf 98 vrf RED

 

Configures an OSPF routing process.

 
Step 24
network ip-address wildcard-mask area area-id


Example:

Router(config-router)# network 192.168.1.0 0.0.0.255 area 0

 

Defines the interfaces on which OSPF runs and the area ID for those interfaces.

 
Step 25
exit


Example:

Router(config-router)# exit

 

Exits to the next higher configuration mode.

 
Step 26
vrf definition vrf-name


Example:

Router(config)# vrf definition RED

 

Defines a VRF.

 
Step 27
address-family ipv4


Example:

Router(config-vrf)# address-family ipv4

 

Enters address family configuration mode to configure a routing session using standard IPv4 address prefixes.

 
Step 28
route-replicate from [vrf vrf-name] {multicast| unicast} {all| protocol-name} [route-map map-tag]


Example:

Router(config-vrf-af)# route replicate from vrf SERVICES unicast all

 

Replicates routes into the base topology within the specified address family.

  • If the allkeyword is specified as a source protocol, only one route-replicate command is allowed per VRF for a given destination topology.
  • Use the connected keyword as a source protocol-name in order to replicate connected routes only.
 
Step 29
exit


Example:

Router(config-vrf-af)# exit

 

Exits to the next higher configuration mode.

 
Step 30
exit


Example:

Router(config-vrf)# exit

 

Exits to the next higher configuration mode.

 
Step 31
vrf definition vrf-name


Example:

Router(config)# vrf definition SERVICES

 

Defines a VRF.

 
Step 32
address-family ipv4


Example:

Router(config-vrf)# address-family ipv4

 

Enters address family configuration mode to configure a routing session using standard IPv4 address prefixes.

 
Step 33
route-replicate from [vrf vrf-name] {multicast| unicast} {all| protocol-name} [route-map map-tag]


Example:

Router(config-vrf-af)# route replicate from vrf RED unicast all

 

Replicates routes into the base topology within the specified address family.

  • This is the reciprocal replication to Step 28 to allow bidirectional traffic.
 
Step 34
end


Example:

Router(config-vrf-af)# end

 

Exits configuration mode.

 
Step 35
show ip route vrf vrf-name


Example:

Router# show ip route vrf RED

 

(Optional) Displays routes, including those replicated, which are indicated by a plus sign (+).

 

Example

The following is the output from the show ip route vrfcommand based on the task in the preceding task table:

Router# show ip route vrf RED
Routing Table: RED
Codes: L - local, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override
Gateway of last resort is not set
	  192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C   +    192.168.1.0/24 is directly connected (SERVICES), GigabitEthernet0/0/0
L   +    192.168.1.3/32 is directly connected (SERVICES), GigabitEthernet0/0/0
Router#

What to Do Next

After you perform the task Configuring Route Replication to Share Services in EVN (and the parallel task for VRF GREEN in the Figure above, Router 3 has routes to 10.0.0.0/8 and 20.0.0.0/8. Also, Router 1 and Router 2 have a route to 192.168.1.0/24.

However, Router 1 and Router 2 still do not have a route to the shared service residing on 192.168.1.1. And Router 4 does not have routes to 10.0.0.0/8 and 20.0.0.0/8. Such access requires the route redistribution performed in the next task, Configuring Redistribution to Share Services in EVN.

Configuring Redistribution to Share Services in EVN

This task is based on the assumption that you also performed the task, Configuring Route Replication to Share Services in EVN.

The figure below shows the same networks we used in the figure above. In this task, we perform redistribution on Router 3 so that Router 1 and Router 2 have a route to the shared service residing on 192.168.1.1.



SUMMARY STEPS

1.    enable

2.    configure terminal

3.    router ospf process-id vrf vrf-name

4.    redistribute vrf vrf-name ospf process-id subnets

5.    redistribute vrf vrf-name ospf process-id subnets

6.    exit

7.    router ospf process-id vrf vrf-name

8.    redistribute vrf vrf-name ospf process-id subnets

9.    exit

10.    router ospf process-id vrf vrf-name

11.    redistribute vrf vrf-name ospf process-id subnets

12.    end

13.    show ip route vrf vrf-name


DETAILED STEPS
 Command or ActionPurpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
configure terminal


Example:

Router# configure terminal

 

Enters global configuration mode.

 
Step 3
router ospf process-id vrf vrf-name


Example:

Router(config)# router ospf 99 vrf SERVICES

 

Configures an OSPF routing process.

 
Step 4
redistribute vrf vrf-name ospf process-id subnets


Example:

Router(config-router)# redistribute vrf RED ospf 98 subnets

 

Redistributes routes from one routing domain into another routing domain.

 
Step 5
redistribute vrf vrf-name ospf process-id subnets


Example:

Router(config-router)# redistribute vrf GREEN ospf 97 subnets

 

Redistributes routes from one routing domain into another routing domain.

 
Step 6
exit


Example:

Router(config-router)# exit

 

Exits to the next highest configuration mode.

 
Step 7
router ospf process-id vrf vrf-name


Example:

Router(config)# router ospf 98 vrf RED

 

Configures an OSPF routing process.

 
Step 8
redistribute vrf vrf-name ospf process-id subnets


Example:

Router(config-router)# redistribute vrf SERVICES ospf 99 subnets

 

Redistributes routes from one routing domain into another routing domain.

 
Step 9
exit


Example:

Router(config-router)# exit

 

Exits to the next highest configuration mode.

 
Step 10
router ospf process-id vrf vrf-name


Example:

Router(config)# router ospf 97 vrf GREEN

 

Configures an OSPF routing process.

 
Step 11
redistribute vrf vrf-name ospf process-id subnets


Example:

Router(config-router)# redistribute vrf SERVICES ospf 99 subnets

 

Redistributes routes from one routing domain into another routing domain.

 
Step 12
end


Example:

Router(config-router)# end

 

Exits configuration mode.

 
Step 13
show ip route vrf vrf-name


Example:

Router# show ip route vrf RED

 

(Optional) Displays routes, including those replicated, which are indicated by a plus sign (+).

 

Configuration Example for EVN Shared Services

Example: EVN Route Replication and Route Redistribution in a Multicast Environment







In the figures above there are three multicast streams:

  • Sred, G1: (10.10.1.200, 232.1.1.1)--Source and receivers in VRF red
  • Sgreen, G1: (10.10.2.201, 232.1.1.1)--Source and receivers in VRF green
  • Sblue, G2: (10.10.3.202, 232.3.3.3)--Source in blue and receivers in VRFs red and green.

The server-prefix in VRF blue (10.10.3.0/24) is replicated and distributed into VRFs red and green on R3 and R2.

Multicast group 232.3.3.3 with its source in VRF blue has receivers in both VRF red and VRF green. The stream is transmitted over the shared VRF (blue), and then replicated into VRF red on R3 and into VRF green on R2.

R1 Configuration

vrf definition blue
 vnet tag 4
 !
 address-family ipv4 
 exit-address-family
!
vrf definition green
 vnet tag 3
 !
 address-family ipv4 
 exit-address-family
!
vrf definition red
 vnet tag 2
 !
 address-family ipv4 
 exit-address-family
!
vrf list vnet-list1 
 member blue
 member red
!
vrf list vnet-list2 
 member blue
 member green
!
vrf list vnet-list3 
 member blue
!
ip multicast-routing distributed
ip multicast-routing vrf red distributed
ip multicast-routing vrf green distributed
ip multicast-routing vrf blue distributed
!
interface FastEthernet0/0/2
 vnet trunk list vnet-list1                           	 [vnet trunk for red and blue]
 ip address 50.50.0.1 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
 !
interface GigabitEthernet0/1/1
 vnet trunk list vnet-list2 				                             [vnet trunk for green and blue] 
 ip address 40.40.0.1 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
!
interface GigabitEthernet0/1/3
 ip address 10.10.0.1 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
!
interface GigabitEthernet0/1/3.2
 vrf forwarding red
 encapsulation dot1Q 2
 ip address 10.10.1.1 255.255.255.0
 ip pim sparse-dense-mode
!
interface GigabitEthernet0/1/3.3
 vrf forwarding green
 encapsulation dot1Q 3
 ip address 10.10.2.1 255.255.255.0
 ip pim sparse-dense-mode
!
interface GigabitEthernet0/1/3.4
 vrf forwarding blue
 encapsulation dot1Q 4
 ip address 10.10.3.1 255.255.255.0
 ip pim sparse-dense-mode
!
router ospf 201 vrf red
 nsf 
 redistribute connected subnets
 network 10.10.1.0 0.0.0.255 area 0
 network 50.50.0.0 0.0.0.255 area 0
!
router ospf 202 vrf green
 nsf 
 network 10.10.2.0 0.0.0.255 area 0
 network 40.40.0.0 0.0.0.255 area 0
!
router ospf 203 vrf blue
 router-id 11.11.11.11
 nsf 
 network 10.10.3.0 0.0.0.255 area 0
 network 40.40.0.0 0.0.0.255 area 0
 network 50.50.0.0 0.0.0.255 area 0
!
router ospf 200
 nsf 
 redistribute connected subnets
 network 10.10.0.0 0.0.0.255 area 0
 network 40.40.0.0 0.0.0.255 area 0
 network 50.50.0.0 0.0.0.255 area 0
!
ip pim ssm default
ip pim vrf red ssm default
ip pim vrf green ssm default
ip pim vrf blue ssm default 
!

R2 Configuration

vrf definition blue
 vnet tag 4
 !
 address-family ipv4 
 exit-address-family
!
vrf definition green
 vnet tag 3
 !
 address-family ipv4 
  route-replicate from vrf blue unicast all route-map blue-map	 [replicate routes from blue
	to green] 
 exit-address-family
!
vrf definition red
 vnet tag 2
 !
 address-family ipv4 
 exit-address-family
!
vrf list vnet-list1 
 member blue
 member green
!
vrf list vnet-list2 
member blue
!
ip multicast-routing distributed
ip multicast-routing vrf red distributed
ip multicast-routing vrf  green distributed
ip multicast-routing vrf blue distributed
! 
interface FastEthernet0/0/6
 vnet trunk list vnet-list2		               		[vnet trunk for blue] 
 ip address 70.70.0.2 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
! 
interface GigabitEthernet0/1/2
 vnet trunk list vnet-list1				[vnet trunk for green and blue] 
 ip address 40.40.0.2 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
! 
interface GigabitEthernet0/1/4
 vnet trunk list vnet-list1				                            [vnet trunk for green and blue] 
 ip address 60.60.0.2 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
! 
router ospf 202 vrf green
 redistribute connected subnets
 redistribute vrf blue ospf 203 subnets route-map blue-map	 [redistribute routes replicated from blue in red] 
 network 40.40.0.0 0.0.0.255 area 0
 network 60.60.0.0 0.0.0.255 area 0
! 
router ospf 203 vrf blue
 router-id 22.22.22.22
 network 40.40.0.0 0.0.0.255 area 0
 network 60.60.0.0 0.0.0.255 area 0
 network 70.70.0.0 0.0.0.255 area 0
!
router ospf 200
 redistribute connected subnets
 network 40.40.0.0 0.0.0.255 area 0
 network 60.60.0.0 0.0.0.255 area 0
 network 70.70.0.0 0.0.0.255 area 0
!
ip pim ssm default
ip pim vrf red ssm default
ip pim vrf green ssm default
ip pim vrf blue ssm default
!
ip prefix-list server-prefix seq 5 permit 10.10.3.0/24
! 
route-map blue-map permit 10
 match ip address prefix-list server-prefix
! 

R3 Configuration

vrf definition blue
 vnet tag 4
 !
 address-family ipv4 
 exit-address-family
!
vrf definition green
 vnet tag 3
 !
 address-family ipv4 
 exit-address-family
!
vrf definition red
 vnet tag 2
 !
 address-family ipv4 
  route-replicate from vrf blue unicast all route-map blue-map 	 [replicate routes from blue  to red]   
 exit-address-family
!
vrf list vnet-list1 
 member blue
 member red
!
vrf list vnet-list2 
 member blue
!
ip multicast-routing distributed
ip multicast-routing vrf red distributed
ip multicast-routing vrf green distributed
ip multicast-routing vrf blue distributed
!
interface GigabitEthernet0/2/0
 vnet trunk list vnet-list1				                     [vnet trunk for red and blue]
 ip address 90.90.0.5 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
!
interface GigabitEthernet1/2/0
 vnet trunk list vnet-list1	                    			[vnet trunk for red and blue] 
 ip address 50.50.0.5 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
!
interface FastEthernet2/0/0
 vnet trunk list vnet-list2				                      [vnet trunk for blue] 
 ip address 70.70.0.5 255.255.255.0
 no ip redirects
 no ip proxy-arp 
 ip pim sparse-dense-mode
!
router ospf 201 vrf red
 redistribute connected subnets
 redistribute vrf blue ospf 203 subnets route-map blue-map	     [redistribute routes replicated from blue in red]
 network 50.50.0.0 0.0.0.255 area 0
 network 90.90.0.0 0.0.0.255 area 0
!
router ospf 203 vrf blue
 router-id 55.55.55.55
 network 50.50.0.0 0.0.0.255 area 0
 network 70.70.0.0 0.0.0.255 area 0
 network 90.90.0.0 0.0.0.255 area 0
!
router ospf 200
 redistribute connected subnets
 network 50.50.0.0 0.0.0.255 area 0
 network 70.70.0.0 0.0.0.255 area 0
 network 90.90.0.0 0.0.0.255 area 0
!
ip pim ssm default
ip pim vrf red ssm default
ip pim vrf green ssm default
ip pim vrf blue ssm default
!
ip prefix-list server-prefix seq 5 permit 10.10.3.0/24
!
route-map blue-map permit 10
 match ip address prefix-list server-prefix
!

Additional References

Related Documents

Related Topic

Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

Easy Virtual Network commands

Easy Virtual Network Command Reference

Overview of Easy Virtual Network

"Overview of Easy Virtual Network" module in the Easy Virtual Network Configuration Guide.

Configuring Easy Virtual Network

"Configuring Easy Virtual Network" module in the Easy Virtual Network Configuration Guide.

Easy Virtual Network management and troubleshooting

"Easy Virtual Network Management and Troubleshooting" module in the Easy Virtual Network Configuration Guide.

MIBs

MIB

MIBs Link

Any MIB that gives VRF information will continue to work with Easy Virtual Network. VRF-Independent MIBs report information on every VRF in a system:

  • CISCO-VRF-MIB
  • CISCO-MVPN-MIB
  • MPLS-VPN-MIB

To locate and download MIBs for selected platforms, Cisco software releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs

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.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for Easy Virtual Network Shared Services

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.

Table 1Feature Information for Easy Virtual Network Shared Services

Feature Name

Releases

Feature Information

EVN Route Replication

Cisco IOS XE Release 3.2S

15.0(1)SY

15.1(1)SG

Cisco IOS XE Release 3.3SG

This module describes how to use route replication and redistribution to share services in an Easy Virtual Network environment.

This feature modifies the following command:

  • redistribute (IP)

This feature introduces the following command:

  • route-replicate (VRF address family)

Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: www.cisco.com/go/trademarks. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1110R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.

© 2012 Cisco Systems, Inc. All rights reserved.

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