From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Sep 14 2006 - 12:35:43 ART
Auto RP Listener allows you to run 224.0.1.39 and 224.0.1.40 as
dense even though you have "ip pim sparse-mode" configured on the
interfaces. Other groups without an RP will not fall back to dense mode
with this configuration. Another option for auto-rp with sparse mode is
to define a default RP to send the 224.0.1.39 and 224.0.1.40 join
messages. The config would look something like:
access-list 1 permit 224.0.1.39
access-list 1 permit 224.0.1.40
!
ip pim rp-address 1.2.3.4 1
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> ccie taker
> Sent: Thursday, September 14, 2006 8:31 AM
> To: ccielab@groupstudy.com
> Subject: AutoRP and pim sparse
>
> I am confusing now with autorp in pim sparse mde environment. Theory
state
> that in sparse mode environment you need to have RP. Fair enough. I
have
> setup this to test it out and is proven RP is need.
>
> However, in order for autoRP to work (224.0.0.39 and 224.0.0.40)
dense-
> mode
> must be facilitate the two group to work. I found that even all link
in
> sparse-mode and withut ip pim autorp listener, I am able to ping the
> muilticast group from one end to another few hops away. I am confusing
> now.
>
> Some one could help me to understand this.
>
> R1 ----- sparse mode ----- R2 ----- sparse mode ----- R3
>
> R1: able to ping 224.3.3.1
> R2: RP candidate and mapping agent
> R3: ip igmp join-group 224.3.3.1
>
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This archive was generated by hypermail 2.1.4 : Sun Oct 01 2006 - 16:55:40 ART