At 01:30 PM 01/17/2001 +0530, Vinod Anthony Joseph Cherunni wrote:
>Dear All,
>
>Is it possible to provide redundancy for an MPLS VPN. If I offer physical level redundancy using two physical leased circuits from a VPN customer terminating in two different Provider Edge (PE) routers configured as a primary, & secondary links. Will the following configuration for the locally available PE routers work -
>
>hostname router1 (PE1)
>!
>interface serial 0
>description *** Primary link to customer XYZ ***
>IP VRF FORWARDING customer-xyz
>ip address 10.2.1.5 255.255.255.252
>!
>router ospf 100 vrf customer-xyz
>!
>router bgp 1
>address-family ipv4 vrf customer-xyz
>neighbor router1 remote-as myas
>neighbor router2 activate
>exit-address-family
>
>
>hostname router2 (PE2)
>!
>interface serial 0
>description *** Secondary link to customer XYZ ***
>IP VRF FORWARDING customer-xyz
>ip address 11.2.1.5 255.255.255.252
>!
>ip route 11.0.0.0 255.0.0.0 11.2.1.6 175 <floating static route to customer's network>
>!
>router bgp 1
>address-family ipv4 vrf customer-xyz
>neighbor router1 remote-as myas
>neighbor router1 activate
>exit-address-family
>
>
>Assuming the traffic engineered path for the customer traffic from the remote PE routers are confgured to route traffic to router1. I would need to ensure that the exit traffic to the customer should use the primary link avaialbale on the router1. In case the primary link fails the traffic should use the secondary link on router2.
I am assuming that you are going to redistribute your customer VRF ospf in MPBGP so that router 2 also knows to use R1.
Floating static in R2 should have AD > 200 (MP-BGP) and this should be redistributed in MP-BGP so R1 can use R2 when its VRF OSPF is
down.
I did not see any of the above in the config you provided
> Now router1 will have an OSPF entry for networks reachable thru the primary link localy available using OSPF with the CPE, & an MBGP entry for customer networks recieved from router2, Will the configuration work as required, wherein router 1 chooses router 2 only in case the OSPF prefix is not visible.
yes
>Also can the same be achieved using a leased line as the primary VPN circuit, & an ISDN / PSTN link as the secondary circuit.
>
>I am just a little confused on how the VRF association will be done on the ISDN / PSTN interfaces.
not sure, I will let some one else answer this part..
>Kindly advice me.
Hope this helps
Zaheer
>With warm regards,
>Vinod.
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