From: Toh Soon, Lim (tohsoon28@gmail.com)
Date: Thu Nov 01 2007 - 03:33:50 ART
Hi Rana,
IMHO, tie-breaker for BSR election is:
1. Highest priority
2. Highest IP address
You can lab it and verify using the command "sh ip pim bsr-router".
Thank you.
B.Rgds,
Lim TS
On 10/5/07, Rana Bilal <rab_91@hotmail.com> wrote:
>
> Folks,
> I more question here.
>
> If I'm using BSR with sparse mode and my question is asking me to
> make one
> of the RP out of the 2RPs as the primary and other one as
> secondary..........what I'm using ........... higher priority configured
> makes one RP as the back up and lower priority makes the other RP as the
> Primary...................Correct me if I'm wrong.
>
> Thanks,
>
>
>
> >From: "Joseph Brunner" <joe@affirmedsystems.com>
> >Reply-To: "Joseph Brunner" <joe@affirmedsystems.com>
> >To: "'Rich Collins'" <nilsi2002@gmail.com>, "'Bob Sinclair'"
> ><bob@bobsinclair.net>
> >CC: "'Cisco certification'" <ccielab@groupstudy.com>
> >Subject: RE: default multicast pim mode
> >Date: Mon, 1 Oct 2007 15:17:36 -0400
> >
> >Rich, more can be said about this...
> >
> >Here are some of my favorites (I made these up just now, so if I'm wrong
> >about something blame the distracting hold music in my ear, LOL)...
> >
> >
> >"ip pim autorp listener"
> >Configure the following routers using PIM Sparse mode, R1 F0/0, R2 F0/0,
> R2
> >F0/1, R2 S0/0, R3 S0/0, R4 S0/0. R1 will be the Dr for the following
> groups
> >239.1.1.1, 224.4.4.4. Do not use static rp assignments. Do not use BSR.
> >
> >(hint = sparse mode + dynamic rp assignments + no bsr allowed)
> >
> >
> >
> >"ip pim bsr"
> >Configure PIM sparse mode on the following interfaces, R1 F0/0, R2 F0/0,
> R2
> >F0/1,, R2 S0/0, R3 S0/0, R4 S0/0. R1 will be the DR for the following
> >groups
> >239.1.1.1, 224.6.6.6. Do not use static rp assignment. No group should
> >require dense mode operation.
> >
> >(hint = sparse mode required, no static rp's allowed, bsr allowed!)
> >
> >
> >
> >"no ip pim dm-fallback & ip igmp static-group"
> >Configure multicast routing between R1 & R6. R1 F0/0, R1 S0/0, R2 S0/0,
> R2
> >F0/1. R2's F0/1 segment will receive a multicast feed originating in R1's
> >F0/0 segment. R2's lan clients do not run IGMP and require access to
> >239.1.1.1. For security reasons R6 should not respond to pings of the
> >multicast group. At no time should this multicast group be able to
> operate
> >in dense mode.
> >
> >(hint = dense mode is never allowed + clients are not allowed to ping
> >239.1.1.1 and get a response from R6)
> >
> >
> >Please everyone post their favorites too!
> >
> >-Joe
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> >Rich
> >Collins
> >Sent: Monday, October 01, 2007 2:32 PM
> >To: Bob Sinclair
> >Cc: Cisco certification
> >Subject: Re: default multicast pim mode
> >
> >Bob,
> >
> >Thanks for that great summary. My approach is to try to study and
> practice
> >the technologies but at the same time try to learn the 'terminology' of
> the
> >task requirements. It is aggravating to actually know the method or
> >technology but then to take the wrong approach because you missed the
> clue
> >in the task requirement statement.
> >
> >Rgds
> >Rich
> >
> >
> >
> >On 10/1/07, Bob Sinclair <bob@bobsinclair.net> wrote:
> > >
> > > Rich Collins wrote:
> > > > I'm curious about BSR. What should you see in the question to point
> >you
> > > in
> > > > that direction versus DM, autorp or static RP?
> > > >
> > > Rich,
> > >
> > > The more you know about these methods, the easier it is to interpret
> the
> > > task requirements. The primary attribute of both Auto-RP and BSR is
> > > dynamic advertising and fail-over. One of the primary
> differentiators
> > > would be Cisco protocol (Auto-RP) versus IETF standard (BSR, PIMv2).
> > > Beyond that, there are many distinctions. For example:
> > >
> > > Auto-RP works with the multicast boundary to enable announcement
> filters
> > > for individual groups, BSR does not.
> > >
> > > Auto-RP RPs and MAs use IP multicast trees to communicate, BSR uses a
> > > combination of subnet-local multicasts and unicast.
> > >
> > > BSR gives us priorities to control candidate RPs and BSRs, Auto-RP
> does
> > > not.
> > >
> > > Auto-RP gives us the scope parameter, BSR does not. This is one of
> the
> > > reasons Beau Williamson is still so hot on Auto-RP.
> > >
> > > As with all topics, the more you know about the protocol and the IOS
> > > options, the easier it is to interpret the task requirements.
> > >
> > > HTH,
> > >
> > >
> > > --
> > >
> > >
> > > Bob Sinclair CCIE 10427 CCSI 30427
> > > www.netmasterclass.net
> >
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