In the solution guide for section 6.2 why do we need to set the pim dr-priority to 10000?
Does it matter if R2 is the DR or R7?
ip pim sparse-mode
ip pim dr-priority 10000
It worked for me without making DR R2. The ideea is :
We have a DR on a multiaccess segment. The DR is responsible for sending the Register Messages to the RP.
If in the DR is the source of the multicast flow then it will not send the Register message to RP so the RP won't know about the flow.
Can you elabrate a little more? If R7 was the DR,it would be the DR of the multicast flow because the source would be10.1.27.7 (we pinged from R7 to 188.8.131.52). Should R2 (RP) wooldn'tknow about the flow? But when I made R7 the DR and checked R2, I got the following:
Rack1R2#sh ip pim vrf 65001 neiPIM Neighbor TableNeighbor Interface Uptime/Expires Ver DRAddress Prio/Mode10.1.27.7 FastEthernet1/0 02:31:04/00:01:27 v2 10000/ DR S184.108.40.206 Tunnel1 02:30:38/00:01:28 v2 1 / DR S
Rack1R2#sh ip pim vrf 65001 rp Group: 220.127.116.11, RP: 10.1.27.2, next RP-reachable in 00:00:08Group: 18.104.22.168, RP: 10.1.27.2, next RP-reachable in 00:00:33
R2 does know about the flow.