[c-nsp] MSDP and my limited knowledge question

[Mihai Tanasescu]

On 9/3/12 9:02 PM, David Prall wrote:
> You're using a GLOP group, so you are AS number 57370?
>
> You do have "ip pim rp-address 192.168.1.2" configured? I am assuming the
> 192.168.1.2 is the MSDP source-address and the BGP source-address.
Yes, that's configured.
This issue only happens when that subnet is not directly connected on 
the interface toward the source and when I have a static route toward it.
I can also see that my source is sending the stream (it is a Linux that 
I use for testing and as such I can easily do a tcpdump).

>
> David
>
> --
> http://dcp.dcptech.com
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mihai Tanasescu
> Sent: Monday, September 03, 2012 2:13 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] MSDP and my limited knowledge question
>
> Hi all,
>
> I have a simple test setup where I'm most likely failing to do something
> right.
>
> It basically looks like this:
>
> My PC --- CPE --- L3 transport network not under my control  -- their
> router (MSDP + BGP + RP here) ---- ( MSDP+ BGP + RP here) C4900
> (192.168.1.1) -- (192.168.1.2) - multicast source (S)
>
> I announce (and originate on the C4900) through BGP the multicast
> sources subnet let's call it: 10.10.10.0/29 which I send to my provider
> (along with the RP/MSDP IP).
> MSDP peers are up, everything seems ok.
>
> a) if I put the 10.10.10.0/29 class as directly connected (between C4900
> and S) instead of the 192.168.1.1 and 192.168.1.2 from above -> all
> works ok and I can view the stream on my PC with VLC.
>
> I also see:
>
> (10.10.10.1, 233.224.26.1), 00:00:09/00:02:58, flags: PTA
>     Incoming interface: GigabitEthernet1/48, RPF nbr 0.0.0.0
>     Outgoing interface list: Null
>
> b) if I put:
> 10.10.10.1/29 or /32 configured on S on a Loopback interface
> and on C4900:
> ip route 10.10.10.0 255.255.255.240 192.168.1.2
>
> then I only have:
>
> (10.10.10.1, 233.224.26.1), 00:00:05/00:02:57, flags: PT
>     Incoming interface: GigabitEthernet1/48, RPF nbr 192.168.1.2
>     Outgoing interface list: Null
>
> the A flag - MSDP Adv candidate is missing
> and if I do a: show ip msdp peer <peer ip> advertise-sa, then I see nothing.
>
> What am I missing ?
> Am I running into any check that I am failing ?
>
> Can you help me out ?
> This subject is quite new to me.
>
> Thanks,
> Mihai
>
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