From: zzk (ccie_99@yahoo.com)
Date: Mon Dec 15 2003 - 09:42:33 GMT-3
Hello
Thanks for the suggestion. The commands are already
there. :(
We followed the sample anycast RP config with MSDP.
Acutally, we noticed the multicast traffics reach R3
during the failover case, but it somehow did not reach
the client on the layer 2 switch.
Regards
--- Craig Dorry <chdorry@yahoo.com> wrote:
> Yes, the problem is that you are hitting RPs. Look
> at
> the source and distribution trees. The server is
> sending multicast traffic and R1 will register with
> the closest anycast IP (Core 1 RP). So you should
> have a source tree from Core 1 back to the server.
> The client will register with Core 2 RP (due to R3
> to
> Core 1 being down). This will result in the root of
> your source tree and the root of your distribution
> tree being in different locations.
>
> A way to fix this would be to implement MSDP between
> Core 1 and Core 2. This would cause Core 1 to
> advertise the multicast source (server) to Core 2
> which would result in Core 2 joining the source tree
> (ie building S,G state over to core 1) connecting
> your
> source and distribution trees.
>
> Config example would be:
> ip msdp peer <loopback IP of remote device>
> connect-source Loopback0
>
> ip msdp cache-sa-state (This is on by default in
> some newer codes)
>
> ip msdp originator-id Loopback0 (Specifies source
> of MSDP packets).
>
> Hope this helps.
> Craig
>
>
>
>
>
>
> --- zzk <ccie_99@yahoo.com> wrote:
> > server
> > |
> > R1---------------------R2
> > | |
> > | |
> > Core 1 (RP)-----------Core 2(RP)
> > | |
> > | |
> > R3---------------------R4
> > | |
> > | |
> > SW1---------------------
> > |
> > |
> > client
> >
> > The network is designed using Anycast RP setup for
> > fast failover time.
> > The network works fine during normal operation.
> > However when two links are down, i.e. link between
> > Core1 to R3 and link between
> > R2 and Core2. The multicast traffic stops.
> >
> > server
> > |
> > R1---------------------R2
> > |
> > |
> > Core 1 (RP)-----------Core 2(RP)
> > |
> > |
> > R3---------------------R4
> > | |
> > | |
> > SW1---------------------
> > |
> > |
> > client
> >
> > The show ip igmp group and show ip mroute still
> show
> > the correct entries. Because of anycast RP, both
> > Core
> > 1 and Core 2 are active RP in the network, will
> this
> > cause this type of problem?
> >
> > thanks
> >
> >
> >
> > __________________________________
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> >
>
This archive was generated by hypermail 2.1.4 : Sat Jan 03 2004 - 08:25:41 GMT-3