[c-nsp] VRF-Lite & Multicast question

[Mihai Tanasescu]

Hi Arie,



Sorry for top posting but I guess this time it will be easier as your 
answer was also above mine:)

This is my network topology and schematic:
http://www.screenshots.cc/show.php/15014_draft.jpeg.html

Router C (in my schema RD-1):

RO-BUC-RD1#sh ip mroute count
IP Multicast Statistics
1 routes using 544 bytes of memory
1 groups, 0.00 average sources per group
Forwarding Counts: Pkt Count/Pkts per second/Avg Pkt Size/Kilobits per 
second
Other counts: Total/RPF failed/Other drops(OIF-null, rate-limit etc)

Group: 224.0.1.40, Source count: 0, Packets forwarded: 0, Packets 
received: 0


RO-BUC-RD1#sh ip mroute

Outgoing interface flags: H - Hardware switched, A - Assert winner
 Timers: Uptime/Expires
 Interface state: Interface, Next-Hop or VCD, State/Mode

(*, 224.0.1.40), 2d22h/00:02:15, RP 172.16.103.237, flags: SJPCL
  Incoming interface: GigabitEthernet1/24, RPF nbr 195.170.181.157
  Outgoing interface list: Null

On one of the VRFs:

http://www.pastebin.org/50188
http://www.pastebin.org/50190

On all interfaces interconnecting RC1 and RD1 I have:

ip pim sparse-dense mode

on RC1 I have ip multicast-routing and ip pim rp-address 172.16.103.237.

If I connect with a laptop in a port in RC1 multicast works.

in RD1 I have:

ip pim rp-address 172.16.103.237
ip pim vrf vrf_business rp-address 172.16.103.237
ip pim vrf vrf_default_1 rp-address 172.16.103.237
ip pim vrf vrf_default_2 rp-address 172.16.103.237
ip pim vrf vrf_default_3 rp-address 172.16.103.237
ip pim vrf vrf_default_4 rp-address 172.16.103.237

(VRF business takes default route from vrf_default_3)


What am I missing or what would be the workaround in my case of setup ?



Thanks and sorry for the long post,
Mihai
Arie Vayner (avayner) wrote:
> Hmm...
>
> Could you share some "show ip mroute" and "show ip mroute count" outputs
> both for global and vrf mode on router C?
>
> First thing to check would be the RPF path for the source - do you have
> a route back to the source through all the interfaces on router C?
>
> Arie 
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mihai Tanasescu
> Sent: Tuesday, July 08, 2008 20:55 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] VRF-Lite & Multicast question
>
> Hello all,
>
>
>
> I have just started studying multicast for accomplishing a task that
> I've been giving and don't know where / what I am doing wrong.
>
>
> My setup is something like the following:
>
>
> RP ---> Router A --- iBGP ---> Router B --- eBGP --> Router C (vrf-lite)
>
>
> between Router B and Router C I have 5 links (4 are vrf-lite in Router 
> C, the 5th is in the global table and use for MPLS ldp).
>
>
> I have configured on each router:
> ip multicast-routing (in C for example for both global and VRF) , ip pim
>
> sparse-dense-mode on interfaces and the RP.
>
>
> If I connect with a cable in Router A I can view the multicast stream.
> Same if I connect in Router B.
>
>
> But in Router C it doesn't work (neither in the global table, neither in
>
> the VRFs from vrf-lite implementation).
>
>
> Can you help with an advice or what I could be doing wrong ? (I'm just a
>
> beginner/newbie when it comes to mcast)
>
>
>
> Thanks,
> Mihai
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