From: Michael Zuo (mzuo@ixiacom.com)
Date: Thu Mar 22 2007 - 02:03:27 ART
Hi Group,
I notice that in Cisco IOS 12.4 Documentation
http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cg/hi
mc_c/mcbsplit.htm#wp1066615 , it says that
the ip multicast multipath command is configured and multiple equal-cost
paths exist, the path in which multicast traffic will travel is selected
based on the source IP address
but later on it also says the selection of the interface depends on the
switching mode:
* With fast switching, load splitting occurs on a per-flow basis. A flow
is a group of packets (traffic) with the same source and destination.
Once the cache is populated for the (S, G) pair, that flow is pinned to
the physical interface assigned on the cache (the outgoing interface
used by the first packet of the flow). If the cached interface goes
down, the cache entry for the (S, G) pair is torn down and the flow is
automatically switched to a different physical interface.
*With process switching, load splitting occurs on a per-packet basis by
round-robin on the equal-cost links.
This is kind of confusing, if the load splitting is based on source IP,
how can it be using per flow/round robin at the same time?
Hope someone knows the answer to this one....
thanks
This archive was generated by hypermail 2.1.4 : Sun Apr 01 2007 - 06:35:52 ART