From: Antonio Soares (amsoares@netcabo.pt)
Date: Sun Jul 15 2007 - 22:32:31 ART
Note: A 'deny' in the 'group-list' access-list has a different meaning
beginning with IOS release 12.0(1.1).
. Before 12.0.(1.1): Deny means "I'm not the RP for this group range."
. After 12.0.(1.1): Deny means "Force this group range to always work in
Dense mode.
Note: Only a single C-RP needs to "deny" this group range to force this to
happen. In other words, the 'deny' overrides any other router's "permit"
advertisement.
Source:
ftp://ftp-eng.cisco.com/ipmulticast/training/Module6.pdf
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Gregory Gombas
Sent: segunda-feira, 16 de Julho de 2007 1:19
To: Group study
Subject: Auto RP filtering
I want my RP to announce the following groups using the least amount of
lines:
226.0.0.0 - 238.255.255.255.
Here is what my ACL looks like:
access-list 1 deny 224.0.0.0 1.255.255.255
access-list 1 deny 239.0.0.0 0.255.255.255
access-list 1 permit 224.0.0.0 15.255.255.255
ip pim send-rp-announce Loopback0 scope 16 group-list 1
But when it advertises the groups I see following debug:
*Mar 21 04:20:27.331: Auto-RP(0): Build announce entry for (-)(224.0.0.0/7)
*Mar 21 04:20:27.331: Auto-RP(0): Build announce entry for (-)(239.0.0.0/8)
*Mar 21 04:20:27.331: Auto-RP(0): Build announce entry for (224.0.0.0/4)
Can someone tell me what the significance of the minus sign (-) that
precedes the multicast address does?
Thanks,
Greg
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:41 ART