From: simplimarvelous (simplimarvelous@xxxxxxxxx)
Date: Mon Apr 16 2001 - 21:14:48 GMT-3
These address belong to the auto rendevous point mechanism
Auto-RP utilizes the "sparse-dense" mode. This allows a Group to be treated
in Sparse Mode if an RP is known or defaults to Dense Mode if it is not. RP
information is conveyed to the routers by the auto RP mechanism that uses 2
well-known groups 224.0.1.39 and 224.0.1.40. The advantage of this is that
any change to the RP designation will need to be configured only on the
Routers that are RPs and not upon the leaf routers as in the static
configuration
look at this article
http://www.cisco.com/warp/public/cc/pd/iosw/tech/rppim_rg.htm
Gerald
----- Original Message -----
From: "Steven Weber" <itweber@earthlink.net>
To: "GROUPSTUDY" <ccielab@groupstudy.com>
Sent: Monday, April 16, 2001 3:45 PM
Subject: multicast routing
> I have configured multicast routing and when I do a sh ip mroute, on the
> routers that I have configured as part of the join group come up with the
> corect multicast address, as well as the 224.0.1.40 and 224.0.1.39
addresses
> which I did not configure, the routers that I did not configure as part of
the
> join-group didn't come up with the multicast address I assigned only
these.39
> and .40 addresses. Would somebody be able to explain to me the
significance of
> these aadresses, where they came from and why they are here.
> Thank You
> Steve
> **Please read:http://www.groupstudy.com/list/posting.html
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