[c-nsp] VRF-Lite & Multicast question

[Mihai Tanasescu]

Hello again,



On a closer look I see for example:


on RC1:
RO-BUC-RC1#sh ip pim neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
      P - Proxy Capable, S - State Refresh Capable
Neighbor          Interface                Uptime/Expires    Ver   DR
Address                                                            Prio/Mode
195.170.181.18    POS2/0/0                 3d00h/00:01:31    v2    1 / S P
195.170.181.158   GigabitEthernet7/6       2d22h/00:01:33    v2    1 / 
DR S P
195.170.181.54    GigabitEthernet7/3       2d22h/00:01:44    v2    1 / 
DR S P
195.170.181.58    GigabitEthernet7/4       2d22h/00:01:28    v2    1 / 
DR S P
195.170.181.170   GigabitEthernet7/2       00:02:53/00:01:18 v2    1 / 
DR S P
195.170.181.146   GigabitEthernet7/5       00:02:59/00:01:43 v2    1 / 
DR S P

on the RD1 (vrf-lite directly connected to this)..choosing one VRF for 
which I see an entry above on RC1 for neighbor:

RO-BUC-RD1#sh ip pim vrf vrf_business neighbor
PIM Neighbor Table
Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
      P - Proxy Capable, S - State Refresh Capable
Neighbor          Interface                Uptime/Expires    Ver   DR
Address                                                            Prio/Mode


I think the problem might be from here but don't know how to fix it :(


-
Mihai

Mihai Tanasescu wrote:
> 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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>>   
>
>