All things related to multicast

[debbie fligor <>]

This just bit us this morning as we replaced a NI40G for an MLX, so I  
thought I would share.  with the 3.7 (and later) code for the MLX/XMR  
platforms you can specify the order of what routes are checked/used  
for rpf/forwarding.  The default setting is to ignore the unicast  
routing table entirely if you have a default mroute set:

route-precedence mc-non-default mc-default uc-non-default uc-default

what we want is to use the unicast campus routing table, then use a  
default mroute, so we needed this custom line:

route-precedence mc-non-default uc-non-default mc-default uc-default


This seemed like something other people might find helpful -- might  
even be something to throw into the workshop slides?

-----
-debbie
Debbie Fligor, n9dn       Network Engineer, CITES, Univ. of Il
email: 

          <http://www.uiuc.edu/ph/www/fligor>
                   "My turn."  -River Tam