All things related to multicast

["Marshall Eubanks" <>]

Hello;


There seems to be some sort of MSDP problem out there this morning.

Symptom 1 - The RTCP beacon. There ius a new multicast beacon in testing,
written by Mitch Kutzko. The view from here of the beacon status is given by

http://www.on-the-i.tv/beacon/beacon_loss.html

You will note that there are a number of beacons for which there are only 
SSRC.
This is beacuse we are not receiving the multicats hhere at multicasttech, but
we are
receiving reports from other beacon sites that doe see these sites. This
situation started at 6:10 AM this morning. (I archive the beacon reports.)

The list before 6:10 AM EDT

                ag.mcs.anl.gov used port 10003 and SSRC   0x36761149 :     25
records read 
                 qbridge.bu.edu used port 10003 and SSRC   0x2ae0a98f :     13
records read 
               gemini.nersc.gov used port 10003 and SSRC   0x2852d542 :     32
records read 
             orca.ncsa.uiuc.edu used port 10003 and SSRC   0x2ece81b9 :     17
records read 
            dogma.nerdc.ufl.edu used port 10003 and SSRC   0x40230739 :     12
records read 
            yendi.ncsa.uiuc.edu used port 10003 and SSRC   0x4f11b930 :     10
records read 
           issola.ncsa.uiuc.edu used port 10003 and SSRC   0x3f4b68ac :     15
records read 
           sarah.trace.wisc.edu used port 10003 and SSRC   0x4c11fd29 :     18
records read 
          cadogan.ncsa.uiuc.edu used port 10003 and SSRC   0x184a64d9 :     19
records read 
         starlsd.sl.startap.net used port 10003 and SSRC   0x7be93f89 :     13
records read 
      hendrix.multicasttech.com used port 10003 and SSRC   0x45cb9469 :     28
records read 
  dyn09.iacc-t21.ndsu.NoDak.edu used port 10003 and SSRC   0x397c59d1 :     19
records read 

 The list now.

                 ag.mcs.anl.gov used port 10003 and SSRC   0x36761149 :     30
records read 
                 qbridge.bu.edu used port 10003 and SSRC   0x2ae0a98f :     33
records read 
               gemini.nersc.gov used port 10003 and SSRC   0x2852d542 :     28
records read 
      hendrix.multicasttech.com used port 10003 and SSRC   0x30cc598a :     21
records read 
  dyn09.iacc-t21.ndsu.NoDak.edu used port 10003 and SSRC   0x397c59d1 :     25
records read 
 
So, we know that 

1.) There are sites up
2.) Other sites that we can see can see them, but we cannot
3.) We still haev MBGP routes for these sites.

Symptom 2.) 

If you look at the multicast status page - 

http://www.multicasttech.com/status/ 
Figure 5

you will see that the number of groups with SA's dropped, between 6:00 AM and
8:00 AM,  from 1279 to 753.

So, combining all this info, I conclude that something in Abilene or I2
is dropping MSDP SA's.

Regards
Marshall Eubanks