Paul, Peter is running sparse-dense so any mcast group without a configure RP will be handled using dense mode.
Also we have I dentified that not only PIM is involved hear, OSPF and HSRP also fails when all three are configured. Peter, Assuming the routers have enough resource, check by looking at CPU utilisation and mem allocation ewhen problem occurs, I think you should log this on CCO and see what Cisco say. I have seen something a little similar on a 6509 running 12.2 IOS. It was also running HSRP , PIM Sparse-dense and OSPF, although the VLANs running HSRP were passive OSPF interfaces. The OSPF adjacencies just timed out but it appeared to still be sending and receiving hello's. It only happened once during a 3 month acceptance test, we were unable to replicate it so took it no further. Please post any resolution, RB. Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=29543&t=29336 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]