From: George Goglidze (goglidze@gmail.com)
Date: Sun Oct 21 2007 - 14:02:22 ART
Hello all,
I'm doing ipexperts section 15 multicast lab, and have couple questions
please.
1) They tell you, for example, on R1 F0/0 you have source for multicast
groups 224.11.11.11.
and you have to announce it automatically.
I do autorp with access-lists to filter only the groups I need, and it works
just fine.
but when I see solution, I see that on the F0/0 interface they have ip igmp
join-group 224.11.11.11 !!!
is this really necessary ??? because I think this could be for testing
purposes.
but if they don't ask you to join the group in a task, you do not really
need to join it do you?
2) they tell me to make the R8 stub router. R8 has source on it's f0/0
224.88.88.88
and everyone needs to see R7 as RP for this multicast source.
so what you do is, on R8 f0/0 put ip igmp helper-address <R7 ip address>
and then that's it. you don't even need to configure pim on R8!!!
all igmp messages will be forwarded to R7, and that's it.
but they did configure pim on all interfaces on R8, and on R7 they filtered
with ip pim neighbor-filter.
which I think is not necessary.
I need your opinion please,
Thank you very much,
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:17 ART