All things related to multicast

["Marshall Eubanks" <>]

And here is another odd one :

We have another source of listener reports in the UK with
very low packet loss, 139.133.204.131

I thought I would see the path to it :

show ip mbgp 139.133.204.131
% Network not in table
multicasttech-1>

multicasttech-1>show ip bgp 139.133.204.131 
BGP routing table entry for 139.133.0.0/16, version 1025021
Paths: (4 available, best #1)
  Not advertised to any peer
  15076 701 702 786
    216.177.55.5 from 216.177.55.5 (216.177.32.254)
      Origin incomplete, localpref 100, weight 500, valid, external, best
  145 11537 20965 786
    166.61.8.89 from 166.61.8.89 (204.147.128.136)
      Origin IGP, localpref 100, valid, external
      Community: 9503719 756091333 1373962395
  1239 701 702 786
    160.81.38.225 from 160.81.38.225 (144.228.242.54)
      Origin IGP, metric 4, localpref 100, valid, external
  701 702 786
    157.130.46.53 from 157.130.46.53 (137.39.4.186)
      Origin IGP, localpref 100, weight 300, valid, external
multicasttech-1>show ip mbgp 139.133.204.131

So, somehow, it sees us even though we do not have a route to it !

Regards
Marshall Eubanks

On Wed, 17 Jul 2002 10:56:22 -0400
 "Marshall Eubanks" 
<>
 wrote:
> We have a (valient) listener sending receiver reports from
> 
> 212.219.212.26
> 
> which is 
> address:      University of Nottingham
> address:      University Park
> address:      Nottingham NG7 2RD
> address:      United Kingdom
> 
> Their <average> packet loss for a 160 kpbs multicast stream is 93%!
> Other receiver reports from elsewhere do not show this.
> 
> We only show one route there :
> 
> multicasttech-1>show ip mbgp 212.219.212.26
> BGP routing table entry for 212.219.0.0/16, version 165680
> Paths: (1 available, best #1)
>   Advertised to non peer-group peers:
>   63.251.101.52 
>   145 11537 20965 786, (aggregated by 786 146.97.36.13)
>     166.61.8.89 from 166.61.8.89 (204.147.128.136)
>       Origin IGP, localpref 100, valid, external, atomic-aggregate, best
>       Community: 9503719 756091333 1373962395
> 
> As a wild guess, I would suspect the Dante-Abilene multicast peering...
> 
> Regards
> Marshall Eubanks