All things related to multicast

[Matthew Davy <>]

On Thu, Feb 24, 2000 at 06:06:43PM -0600, W. Bruce Curtis wrote:
>   I just got back to my office and checked.  We are receiving the
> session announcement now in sdr.  I also just checked the msdp cache
> in our router and although we last heard the announcement less than
> 2 minutes ago the announcement still isn't in the msdp cache.
>
>   So adding 'ip sdr listen' fixed the symptom (thanks) but the source of
> the problem hasn't been fixed yet.

Yep, this just covers up the real problem.   I've been hesitant to do this
across the board because we might not see these kind of problems when they pop
up.  On the other hand, it is often difficult to find & fix these problems 
and 
it's nice to have full SDR caches in the meantime.

- Matt



> 
> i2.ndsu>show ip sdr "NASA TV - Broadcast from NASA HQ"
> SDR Cache - 78 entries
> Session Name: NASA TV - Broadcast from NASA HQ
>   Description: NASA TV - Broadcast from NASA Headquarters
>   Group: 0.0.0.0, ttl: 0, Contiguous allocation: 1
>   Lifetime: from 08:43:32 cdt Feb 23 2000 until 09:43:32 CDT Aug 24 2000
>   Uptime: 00:28:44, Last Heard: 00:01:44
>   Announcement source: 131.182.10.250, destination: 224.2.127.254
>   Created by: ellery 3154257059 3160305812 IN IP4 131.182.10.250
>   Phone number: +01 202 6518500
>   Email: 
> 
>      (Jeff Fesler)
>   URL: http://www.nasa.gov/ntv
>   Media: audio 24920 RTP/AVP 0
>     Media group: 224.2.171.2, ttl: 127
>   Media: video 51800 RTP/AVP 31
>     Media group: 224.2.171.2, ttl: 127
>     Attribute: framerate:9
>     Attribute: quality:8
>     Attribute: grayed:0
> 
> i2.ndsu>show ip msdp sa-cache | include 131.182.10.250
> (131.182.10.250, 224.2.171.2), RP 198.10.80.1, MBGP/AS 24, 1d06h/00:05:07
> i2.ndsu>
> 
> 
> > Could you confirm this is working now ??  I added 'ip sdr listen' to the
> > GreatPlains interface on the KSCY router.  I'd guess someone is sending 
> > bogus
> > joins causing the MSDP SAs for (131.182.10.250, 224.2.127.254) to be 
> > supressed.
> > 
> > - Matt
> > 
> > 
> > 
> > On Thu, Feb 24, 2000 at 05:04:38PM -0600, Gordon Rogier wrote:
> > > Bruce, I am forwarding this up to 
> > > .
> > >   Matthew
> > > Davy at Abilene is wanted to talk about this at the FoD meeting and it
> > > would probably help him to have some additional acknowledgement of this
> > > problem while the meeting are going on.
> > > 
> > > --*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*--
> > > Gordon Rogier                        
> > > 
> > >             
> > > Network Engineer                     785-864-0381wk 785-550-4468 cell
> > > Great Plains Network                 785-864-9330 FAX
> > > 
> > > On Thu, 24 Feb 2000, W. Bruce Curtis wrote:
> > > 
> > > > 
> > > >   Jeff, the audio and Video for the NASA TV group is making it here
> > > > now.  However we aren't receiving the advertisement in SDR.
> > > > 
> > > >   Gordon, I see that the Abilene routers are receiving the NASA TV
> > > > announcement and it does show up in their SDR cache as being updated
> > > > every couple of minutes.  It also looks like the Abilene Kansas City
> > > > router is not doing sdr listen towards the Kansas City router anymore.
> > > > 
> > > >   So the NASA TV SDR anouncement isn't being advertised to Abilene in
> > > > MSDP correctly.  However it is being leaked to the Abilene routers
> > > > via the sdr listen side effect but it is no longer being leaked to
> > > > GPN via the sdr listen side effect.
> > > > 
> > > > Thanks,
> > > > -- 
> > > > Bruce Curtis                     
> > > > 
> > > > Network Consultant               701-231-8527
> > > > Certified NetAnalyst II          My computer loves NeXTmail.
> > > > North Dakota State University    
> > > > 
> > > 
> > 
> 
> 
> -- 
> Bruce Curtis                     
> 
> Network Consultant               701-231-8527
> Certified NetAnalyst II          My computer loves NeXTmail.
> North Dakota State University    
>