Bidirectional PIM

From: gladston@br.ibm.com
Date: Sat Sep 03 2005 - 15:52:51 GMT-3

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Is the result of 'ip mroute x.x.x.x' when using Bidirectional PIM this way?

Rack2R11#sh ip mrou 239.6.6.6

(*, 239.6.6.6), 00:41:34/00:02:55, RP 148.5.4.1, flags: BP
  Bidir-Upstream: FastEthernet3/0, RPF nbr 148.5.114.4
  Outgoing interface list:
    FastEthernet3/0, Bidir-Upstream/Sparse-Dense, 00:41:23/00:00:00

It seems to be working correctly, but I found it weird the absence of the source on the result of show ip mroute.

       **RP**
R11------R4--------R2

source---->(f0/0)R11(f3/0)------(f1/1.80)R4(s0/1)--------(s0/1)R2

R4 is the RP.
R2 joined the group 239.6.6.6

When using PIM-SM I can see the register process.
R11 receives the multicast from the source but there is no indication that it forwards it to the RP when I see the result of 'show ip mrout 239.6.6.6; but 'debug ip mpacket' show that R11 is forwarding the multicast toward RP.
Also, 'debug ip mpacket' on RP shows it is forwarding traffic toward the receiver, R2.

Rack2R4#sh ip mrou 239.6.6.6

(*, 239.6.6.6), 00:30:28/00:02:58, RP 148.5.4.1, flags: BCL
  Bidir-Upstream: Null, RPF nbr 0.0.0.0
  Outgoing interface list:
    Loopback0, Forward/Sparse-Dense, 00:26:08/00:02:54
    Serial0/1, Forward/Sparse-Dense, 00:30:28/00:02:34

Debug on R11

Rack2R11(config-if)#deb ip mpack

*Sep 3 12:15:07: IP(0): s=150.100.1.254 (FastEthernet0/0) d=239.6.6.6 (FastEthernet3/0) id=1610, prot=1, len=100(100), mforward
Rack2R11#
*Sep 3 12:15:09: IP(0): s=150.100.1.254 (FastEthernet0/0) d=239.6.6.6 (FastEthernet3/0) id=1611, prot=1, len=100(100), mforward
Rack2R11#
*Sep 3 12:15:11: IP(0): s=150.100.1.254 (FastEthernet0/0) d=239.6.6.6 (FastEthernet3/0) id=1612, pr

Debug on R4

IP multicast packets debugging is on
Rack2R4#
*Mar 15 22:23:22: IP(0): s=150.100.1.254 (FastEthernet1/1.80) d=239.6.6.6 (Serial0/1) id=1689, prot=1, len=100(100), mforward
Rack2R4#
*Mar 15 22:23:24: IP(0): s=150.100.1.254 (FastEthernet1/1.80) d=239.6.6.6 (Serial0/1) id=1690, prot=1, len=100(100), mforward
Rack2R4#
*Mar 15 22:23:26: IP(0): s=150.100.1.254 (FastEthernet1/1.80) d=239.6.6.6 (Serial0/1) id=1691, prot=1, len=100(100), mforward

R4 config:

ip pim rp-address 24.24.24.24
ip pim rp-address 148.5.4.1 5 bidir

Rack2R4#sh ip pim ne
PIM Neighbor Table
Neighbor Interface Uptime/Expires Ver DR
Address Prio/Mode
148.5.24.2 Serial0/1 00:35:23/00:01:16 v2 1 / B S
148.5.114.11 FastEthernet1/1.80 00:49:54/00:01:33 v2 1 / DR B S

R2 config:
ip pim bidir-enable
ip pim rp-address 148.5.4.1 bidir

Rack2R2#sh ip mrout 239.6.6.6
(*, 239.6.6.6), 00:35:00/00:02:59, RP 148.5.4.1, flags: BCL
  Bidir-Upstream: Serial0/1, RPF nbr 148.5.24.4
  Outgoing interface list:
    Loopback0, Forward/Sparse-Dense, 00:35:00/00:02:58
    Serial0/1, Bidir-Upstream/Sparse-Dense, 00:35:00/00:00:00

R11 config:

ip pim bidir-enable
ip pim rp-address 148.5.4.1 bidir

Rack2R11#sh ip mrou 239.6.6.6

(*, 239.6.6.6), 00:36:18/00:02:50, RP 148.5.4.1, flags: BP
  Bidir-Upstream: FastEthernet3/0, RPF nbr 148.5.114.4
  Outgoing interface list:
    FastEthernet3/0, Bidir-Upstream/Sparse-Dense, 00:36:08/00:00:00

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