From: Gupta, Gopal (NWCC) (gopal.gupta@hp.com)
Date: Sat Nov 10 2007 - 12:51:26 ART
Hello Experts,
I was practicing multicast after listening Brian's videos. I am having
trouble with the following scenario.
R6--SW1--R3-Frame Relay-R5--SW2
On R3 facing interface to R5 we have Sparse-dense and on R5 facing R3 we
have sparse mode.. all other routers' interfaces have sparse dense
configured...no RP is there....so any source sending traffic for any
group will fallback to dense mode.
In this scenario:
Traffic is being perfectly forwarded from R3-->SW1-->R6 no issues till
here but my question is why R5 is still able to send the traffic to R6
for group 230.30.30.30 out FR to R3, which it has no entry for
230.30.30.30 out Serial interface to R3.....as it has sparse mode on the
serial interface and Sparse-dense on R3.
(*, 230.30.30.30), 00:00:05/stopped, RP 0.0.0.0, flags: D
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Ethernet0/1, Forward/Sparse-Dense, 00:00:05/00:00:00
(155.1.58.8, 230.30.30.30), 00:00:05/00:02:54, flags: PT
Incoming interface: Ethernet0/1, RPF nbr 0.0.0.0
Outgoing interface list: Null
This above bold entry is SW2's Ethernet interface connceting to R5,
pruned by R5.
(*, 224.0.1.40), 00:22:20/00:02:07, RP 0.0.0.0, flags: DCL
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list:
Ethernet0/1, Forward/Sparse-Dense, 00:22:20/00:00:00
Serial1/0, Forward/Sparse, 00:22:20/00:02:07
Acc to above table group has come into dense mode..
Another question is :- will router be able to send/receive traffic for
dense mode if its interface is configured with Sparse mode??as R5's int
to R3 is ?? Practically its happening.
SW2 is not able to send traffic for group 230.30.30.30...because it is
being pruned by R5
Note:- I am pinging to 230.30.30.30 from R5/SW2 to R6 (joined group
230.30.30.30).
Will you please throw some light what exactly is happening in this
scenario?
Hope I have been able to make you understand my question.
Thanks
Gops
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:29 ART