From: Antonio Soares (amsoares@netcabo.pt)
Date: Mon Jul 16 2007 - 14:26:33 ART
Hello group,
1) We know that the PIM router with the HIGHEST IP Address will be elected
the PIM DR on a particular segment (we can change this with the "ip pim
dr-priority" command).
2) We also know that the PIM router with the LOWEST IP Address will be
elected the IGMPv2 Querying Router on a particular segment. Is there any way
to change this default behaviour ?
3) Finally, we know that if the AD and Metric is the same for a particular
(S,G) pair, the Assert mechanism will dictate that the Router with the
HIGHEST IP Address will be the Forwarder on a particular segment. Once
again, is it possible to change this default behaviour ?
Bellow an example of a router which is a DR but not an IGMPv2 Querier.
++++++++++++++++++++
R6#sh ip igmp interface f0/1
FastEthernet0/1 is up, line protocol is up
Internet address is 100.1.64.6/24
IGMP is enabled on interface
Current IGMP host version is 2
Current IGMP router version is 2
IGMP query interval is 60 seconds
IGMP querier timeout is 120 seconds
IGMP max query response time is 10 seconds
Last member query count is 2
Last member query response interval is 1000 ms
Inbound IGMP access group is not set
IGMP activity: 0 joins, 0 leaves
Multicast routing is enabled on interface
Multicast TTL threshold is 0
Multicast designated router (DR) is 100.1.64.6 (this system) <-----
IGMP querying router is 100.1.64.4 <-----
No multicast groups joined by this system
R6#
++++++++++++++++++++
Thanks,
Antonio
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:41 ART