From: jin (jin10101010@xxxxxxxxxxx)
Date: Sun Aug 25 2002 - 06:06:41 GMT-3
It's so difficult. And I can't understand.
I have read so many book. But I'm still confused.
Network is below like the one that we already have been discussed with it durin
g several months.
ether-r1--r2--r3-ether. All router links are F/R and 2 ethernet of r1 and r3.
R2 is not a hub router. r1-r1 and r2-r3 is different network.
Now this is the problem.
If r1 has a igmp join group like 224.100.100.100, and r1 is a Auto-RP and MA, r
2 can ping to the 224.100.100.100 but r3 can't.
I checked pim rp mapping and rpf table.
When I check the mroute table after pinging to the 224.100.100.100 on the r3, m
route table show that ping's next hop is ethernet of r3.
And there is no outgoing interface, saying NULL. But 'sh ip pim rp mapping' sho
w me the next hop of the 224.100.100.100 is r1's loopback,which is set by ip pi
m send-rp-announce <intf> scope.
I don't understand what's wrong.
Is there something mistaken?
Please let me know.
PS.
routing table is good. I know multicast rpf first check the igp table. And I'm
sure my igp table is almost complete.
I saw this discussion this year early. But also there was no solution.
And please let me doing basic command, like that 'do not use the ip pim nbma wi
th sparse-dense mode'..
If I don't know about it basically, I won't post this discussion.
Thanks Group.
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