RE: Multicast Sparse mode

Hi Experts.
R1---R2---R3---R4----R5
Running sparse mode. R3 is RP(3.3.3.3), R1 is server(10.0.1.1), R5 is client (225.0.5.5).
Whenever I start pinging multicast group (225.0.5.5).
R2 is also having (*,G) entry in its Multicast routing table. Why?
R2#show ip mroute
(*, 225.0.5.5), 00:01:04/stopped, RP 3.3.3.3, flags: SP
Incoming interface: Null, RPF nbr 0.0.0.0
Outgoing interface list: Null
(10.0.1.1, 225.0.5.5), 00:01:04/00:01:55, flags: T
Incoming interface: Ethernet0/1, RPF nbr 10.0.1.1
Outgoing interface list:
Serial1/1, Forward/Sparse, 00:01:04/00:03:25

----------------------------------------
> From: kalpeshchheda_at_live.com
> To: ccielab_at_groupstudy.com
> Subject: Multicast Sparse mode
> Date: Mon, 11 Mar 2013 08:15:14 +0530
>
> Hi Experts.
>
> R1---R2---R3---R4----R5
>
> Running sparse mode. R3 is RP(3.3.3.3), R1 is server(10.0.1.1), R5 is client (225.0.5.5).
>
> Whenever I start pinging multicast group (225.0.5.5).
>
> R2 is also having (*,G) entry in its Multicast routing table. Why?
>
> R2#show ip mroute
>
> (*, 225.0.5.5), 00:01:04/stopped, RP 3.3.3.3, flags: SP
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list: Null
> (10.0.1.1, 225.0.5.5), 00:01:04/00:01:55, flags: T
> Incoming interface: Ethernet0/1, RPF nbr 10.0.1.1
> Outgoing interface list:
> Serial1/1, Forward/Sparse, 00:01:04/00:03:25
> (*, 225.0.5.5), 06:58:43/00:02:53, RP 150.1.5.5, flags: SJPL
> Incoming interface: Null, RPF nbr 0.0.0.0
> Outgoing interface list: Null
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Mon Mar 11 2013 - 08:24:48 ART