From: Scott Morris (smorris@ipexpert.com)
Date: Sun Jun 17 2007 - 12:29:33 ART
The RPF check in a (*,G) entry is actually against the RP's address. In a
(S,G) entry, the RPF check is against the actual source.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
VP - Technical Training - IPexpert, Inc.
IPexpert Sr. Technical Instructor
A Cisco Learning Partner - We Accept Learning Credits!
smorris@ipexpert.com
Telephone: +1.810.326.1444
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http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Erich Herzog
Sent: Sunday, June 17, 2007 9:20 AM
To: ccielab@groupstudy.com
Subject: Mutlicast SPT switchover, new RPF check?
When the RP switches to SPT, does the the source/dest do another RPF Check?
I noticed, when the SPT switched, it took a different path than the path to
m RP (specified with ip mroute). Before I set NBMA mode, it worked fine.
After I slapped on NMBA mode, the pings failed after the SPT switchover, but
responded a couple times before the switchover. I had to add additional
mroutes to include the multicast source, and force it to travel on the same
RP path to get it to work.
Anyone care to explain? Thanks,
Erich
This archive was generated by hypermail 2.1.4 : Sun Jul 01 2007 - 17:24:49 ART