From: Joe Higgins (netsat@xxxxxxxxxxxxx)
Date: Wed Jun 26 2002 - 12:53:10 GMT-3
I have the following problem. I have three routers r4, r1 and r2. All
have ip multicasting-routing running. R4 is connected to r1 via frame.
serial 1 to serial 1. R1 is connected to r2 via frame, serial 0 to
serial 0. All affected interfaces are running ip pim sparse-dense. R2
has ip igmp join on its e0 interface for multicast address 224.0.7.7.
Ospf is running between al routers
R4-s1 <> R1-s1-R1-s0 <> R2-s0
Before I enable auto rp on R2 I can ping 224.0.7.7 from r4. After I
enable auto rp on r2 I cannot ping 224.0.7.7 from r4. I have configured
both announce and discovery on r2. R1 mroute shows the following when
it fails.
(*, 224.0.1.39), 00:19:43/00:02:59, RP 0.0.0.0, flags: DJC
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0, Forward/Sparse-Dense, 00:19:43/00:00:00
Serial1, Forward/Sparse-Dense, 00:19:43/00:00:00
(2.2.2.2, 224.0.1.39), 00:00:43/00:02:16, flags: PCT
Incoming interface: Serial0, RPF nbr 1.1.2.2
Outgoing interface list:
Serial1, Prune/Sparse-Dense, 00:00:43/00:02:22
(*, 224.0.1.40), 00:20:25/00:00:00, RP 0.0.0.0, flags: DJCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Serial0, Forward/Sparse-Dense, 00:20:25/00:00:00
Serial1, Forward/Sparse-Dense, 00:20:26/00:00:00
(2.2.2.2, 224.0.1.40), 00:19:53/00:02:59, flags: CLT
Incoming interface: Serial0, RPF nbr 1.1.2.2
Outgoing interface list:
Serial1, Forward/Sparse-Dense, 00:19:53/00:00:00
(*, 224.0.7.7), 00:00:11/00:02:59, RP 2.2.2.2, flags: SP
Incoming interface: Serial0, RPF nbr 1.1.2.2
Outgoing interface list: Null
(1.1.4.4, 224.0.7.7), 00:00:11/00:02:48, flags: PT
Incoming interface: Serial1, RPF nbr 1.1.4.4
Outgoing interface list: Null
On both r1 and r4 a show ip pim rp mapp indicates
Group(s) 224.0.0.0/4
RP 2.2.2.2 (?), v2v1
Info source: 2.2.2.2 (?), via Auto-RP
Uptime: 00:34:44, expires: 00:01:59
R1 gets the ping but fails to send it to an outgoing interface. I know
that there is a problem wt. multicast and frame but what I have read
only refers to coming in and out of the same physical interface.
Additional facts are as follows. If I make the connection from r4 to r1
hdlc, it works. If I put the rp announce and agent on r1, it works. I
have spent a couple of days on this and any help would be appreciated.
I really hurts not having the search facility working on this site.
Thanks in advance.
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