Re: IPX V1-lab10 (MSDP)

I found the problem.

AS1 runs auto-RP, and R5 loopback was in sparse mode appose to sparse-dense
like the rest of the interfaces in AS1.
Once I changed that to sparse-dense (since AS1 is not configured to use
auto-rp listener), R9 could ping the Multicast group on R5.

But I dont understand why this broke R9's connectivity which is in a
different AS.
If anybody could suggest a reason for this, just for me to understand
multicast a bit better I would really appreciate it.

Regards
John

On Tue, Jun 29, 2010 at 11:11 PM, IOS GIMP <isaydoodalot_at_gmail.com> wrote:

> Hi Tyson
>
> Thanks for the quick response.
> R9 can reach R5 via unicast, no problem.
>
> Rack6R9#ping 200.0.0.5
> Sending 5, 100-byte ICMP Echos to 200.0.0.5, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 4/27/60 ms
>
> BUT, R9 doesn't have a route to R5 group
> Rack6R9#sh ip mroute 225.0.0.55
> Group 225.0.0.55 not found
>
> Am I correct in saying that R6 is then not advertising this group to R9.
> Any idea why that is.
>
> Rack6R9#sh ip pim rp mapp
> PIM Group-to-RP Mappings
>
> Group(s) 224.0.0.0/4
> RP 150.50.69.1 (?), v2
> Info source: 150.50.69.1 (?), via bootstrap, priority 0, holdtime 150
> Uptime: 02:17:20, expires: 00:02:18
>
> R6 has another group (226.0.0.66) that R9 can ping.
>
> Regards
>
>
>
>
> On Tue, Jun 29, 2010 at 10:54 PM, Tyson Scott <tscott_at_ipexpert.com> wrote:
>
>> Does R9 know how to get to the source address on R5 for this solution.
>>
>> Regards,
>>
>> Tyson Scott - CCIE #13513 R&S, Security, and SP
>> Managing Partner / Sr. Instructor - IPexpert, Inc.
>> Mailto: tscott_at_ipexpert.com
>>
>>
>>
>> -----Original Message-----
>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>> IOS
>> GIMP
>> Sent: Tuesday, June 29, 2010 4:38 PM
>> To: ccielab_at_groupstudy.com
>> Subject: IPX V1-lab10 (MSDP)
>>
>> hello
>>
>> I hope someone can point me in the right direction.
>> I have done IP-expert volume 1 lab 10 on multicast.
>>
>> But there one thing I cant get working.
>>
>> The topology
>>
>> R1
>> |
>> R2-------R6------R9
>> |
>> R5
>> (225.0.0.55)
>>
>> R1, R2, R5 is in AS1 and R6 and R9 is in AS2
>> AS1 run auto-rp and AS2 runs BSR with R2 and R6 the respective RP/MA and
>> RP/BSR.
>> R2 and R6 are MSDP peers and Multicast-BGP with connected interfaces
>> redistribute under ipv4 multicast.
>>
>> Every router (including R6) can ping the IGMP join interface on R5 fa0/0
>> (225.0.0.55) except R9.
>> There is no RPF failures, as per the debugs. All unicast routing seems to
>> be
>> inplace.
>> The traffic from R9 is getting to R6 but not to R2 as per the 'debug ip
>> mpacket'
>>
>> My question is around the multicast table on R6:
>>
>> Rack6R6#sh ip mroute 225.0.0.55
>> IP Multicast Routing Table
>> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
>> Connected,
>> L - Local, P - Pruned, R - RP-bit set, F - Register flag,
>> T - SPT-bit set, J - Join SPT, M - MSDP created entry,
>> X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
>> U - URD, I - Received Source Specific Host Report,
>> Z - Multicast Tunnel, z - MDT-data group sender,
>> Y - Joined MDT-data group, y - Sending to MDT-data group
>> Outgoing interface flags: H - Hardware switched, A - Assert winner
>> Timers: Uptime/Expires
>> Interface state: Interface, Next-Hop or VCD, State/Mode
>>
>> (*, 225.0.0.55), 00:01:45/stopped, RP 150.50.69.1, flags: SP
>> Incoming interface: Null, RPF nbr 0.0.0.0
>> Outgoing interface list: Null
>>
>> (200.0.0.6, 225.0.0.55), 00:00:12/00:02:53, flags: PTA
>> Incoming interface: Loopback0, RPF nbr 0.0.0.0
>> Outgoing interface list: Null
>>
>> (200.0.0.9, 225.0.0.55), 00:01:45/00:01:15, flags: PT
>> Incoming interface: Multilink1, RPF nbr 150.50.69.2
>> Outgoing interface list: Null
>>
>>
>> Notice that the (s,g) entry for R9 is missing the 'A - Candidate for MSDP
>> Advertisement'
>> But for R6 it is not.
>>
>> I cant seem to figure why that is or what could prevent R6 from
>> advertising
>> R9 as a source to R2.
>>
>> Any help would be appreciated.
>>
>> Regards
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
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Received on Wed Jun 30 2010 - 19:57:21 ART