10-15-2009 10:10 AM
Hello Everybody,
I have a question regarding Auto-route announce feature.
If Auto-route feature is enabled to advertise the subnets in a Tunnel use it in SPF calcualtion, then will I be able to use PIM protocol on the global network( on which Auto-route announce is enabled?
10-16-2009 11:42 AM
Maanya,
This is correct but you will need the following command under the ospf or isis process to allow the reverse path forwarding to succeed when the route back to the source points at the tunnel interface:
mpls traffic-eng multicast-intact
Please refer to the following url for more information about this command:
http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/mplstemi.html
Regards
11-16-2009 02:55 PM
Harold,
If the tunnel is only one-way ? do you still need this command ? :)
e.g. lets say we have:
Src----PE1----P1----PE2---Receiver
If there is only one TE tunnel configured from PE1 -> PE2 but on the way back from PE2 to PE1 there is no tunnel?
I would think that you would not need this command in this scenario ?
So multicast is not LS like unicast is and therefore if the route back to source points to tunnel interface, the command is needed to make RPF successful.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide