From: ccie2be (ccie2be@nyc.rr.com)
Date: Wed Aug 11 2004 - 20:01:14 GMT-3
Hi guys,
I know that in some scenarios multicast traffic can't be sent out the same
physical interface from which it came in.
For example, when running sparse mode over a partial mesh f/r network when the
hub isn't configured with
ip pim nbma mode. (See IE lab 4.)
hub
spoke1 --- s 0/0 --- spoke2
If spoke2 is a member of a mcast group and spoke 1 pings that mcast group, the
ping will fail because of this.
One way around this problem is to create a tunnel from spoke 1 to spoke 2.
Question1: Is this the only way to overcome this multicast split horizon
problem?
Q2: Is this SPLIT HORIZON PROBLEM ALWAYS present regardless of mode (dense vs
sparse) and regardless of if hub interface has ip pim nbma mode configured?
Thanks, Tim
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