From: Joe Higgins (netsat@xxxxxxxxxxxxx)
Date: Sun Aug 25 2002 - 09:04:21 GMT-3
Change the serial interface on r2/r3 to point to point or hdlc and try it.
jin wrote:
> 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 dur
ing 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,
r2 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,
mroute 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' s
how me the next hop of the 224.100.100.100 is r1's loopback,which is set by ip
pim 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
with sparse-dense mode'..
> If I don't know about it basically, I won't post this discussion.
>
> Thanks Group.
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