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Limiting Routes to Be Advertised by an MVPN VRF Instance

If a hub-and-spoke deployment uses one VPN routing and forwarding (VRF) routing instance for unicast routing and a separate VRF for MVPN routing, you need to limit the PE routers at the hub site to advertise only IPv4 MVPN routes, only IPv6 MVPN routes, or both. This is necessary to prevent the multicast VRF instance from advertising unicast VPN routes to other PE routers.

Note: This configuration does not prevent the exportation of VPN routes to other VRF instances on the same router if the auto-export statement is included in the
[edit routing-options] hierarchy.

To configure a VRF routing instance with the name green to advertise MVPN routes from both the inet and inet6 address families, perform the following steps:

  1. Configure the VRF routing instance to advertise IPv4 routes.
    user@host# set routing-instances green vrf-advertise-selective family inet-mvpn
  2. Configure the VRF routing instance to advertise IPv6 routes.
    user@host# set routing-instances green vrf-advertise-selective family inet6-mvpn

After the configuration is committed, only the MVPN routes for the specified address families are advertised from the VRF instance to remote PE routers. To remove the restriction on routes being advertised, delete the vrf-advertise-selective statement.

Note: You cannot include the vrf-advertise-selective statement and the no-vrf-advertise statement in the same VRF configuration.


Published: 2010-04-28

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