From: Kyle MacDonald (Kyle.MacDonald@pwgsc.gc.ca)
Date: Fri Jun 15 2007 - 09:43:16 ART
Hi Antonio,
I'm clearly not very strong on Bidir. Reading up on it, it looks like
Bidir is the best solution here. Did the requirement ask you to
consider the scenario of the RP becoming unavailable? If not, I think
that Bidir meets the requirement and is the simplest solution.
Kyle
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Antonio Soares
Sent: Friday, June 15, 2007 7:45 AM
To: ccielab@groupstudy.com
Subject: RE: Avoiding (S,G) Entries
Hello group,
Any takers to this ?
I understand that with PIM-BIDIR no (S,G) entries are created. But when
the RP becomes unavailable, i assume that PIM will fallback from SM to
DM. Maybe not, if all the interfaces are configured as PIM-SM only. So i
see the the combinations that follow in order to avoid any (S,G)
entries:
- PIM-BIDIR + all PIM interfaces configured in SM only.
- PIM-SM + interfaces configured in SM-DM + no ip pim dm-fallback
The command "ip pim spt-threshold infinity" does not resolve the problem
in the path from the RP upstream to the Source. At least one router will
have an (S,G) entry.
Thanks,
Antonio
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Antonio Soares
Sent: sexta-feira, 15 de Junho de 2007 1:24
To: ccielab@groupstudy.com
Subject: Avoiding (S,G) Entries
Hello group,
I have some problems with the task wording when it calls to avoid (S,G)
entries in the Mcast Routing Table.
I see 3 options and i would like to have your inputs regarding the
different behaviours we get with each command:
- ip pim bidir-enable and ip pim rp-address x.x.x.x bidir
- no ip pim dm-fallback
- ip pim spt-threshold infinity
Thanks,
Antonio
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