Re: PIM Neighbors

Additionally, take a look at the following URL which contains this handy
excerpt:

http://www.cisco.com/en/US/tech/tk828/technologies_tech_note09186a0080093f21.shtml#showippimneighbor

*DR Prio* - The possible values are 0 to 4294967294 or "N"

This is a new column which tracks the priority of a PIM interface for DR
election. The feature to configure a DR based on highest priority versus
highest IP address was introduced in Cisco IOS Software Releases 12.1(2)T
and 12.2 and Cisco IOS images with Bidir-PIM. You can use the *ip pim
dr-priority <0-4294967294>* interface command to set the DR priority. The
default DR priority is set to 1. For interoperability, if a PIM neighbor is
running an older Cisco IOS version which does not support the DR priority
feature, the "DR Prior" column shows as "N". If the neighbor is the only
router showing "N" for the interface, it becomes the DR regardless of which
router actually has the highest IP address. If there are serveral PIM
neighbors with "N" listed under this column, the tie breaker is the highest
IP address among them.

On Fri, Jul 31, 2009 at 4:13 AM, Joe Astorino <jastorino_at_ipexpert.com>wrote:

> Router#sh ip pim neigh
> PIM Neighbor Table
> Mode: B - Bidir Capable, DR - Designated Router, N - Default DR Priority,
> S - State Refresh Capable
>
>
> So... N/DR means the default DR priority and that it is the designated
> router. DR S means it is the designated router and also has state refresh
> capability. The reason you see two DRs here is because you have multiple
> different segments where a DR is possible -- One for each.
>
>
>
> On Fri, Jul 31, 2009 at 3:55 AM, Jitendra Anbu <Jitendra.Anbu_at_optus.com.au
> > wrote:
>
>> Hi all,
>>
>> Is it common to see more than one DR in a "sh ip pim neighbor" output?
>>
>> what is the difference between N / DR & DR S
>>
>> Here's my output;
>>
>> R1#sh ip pim nei
>> PIM Neighbor Table
>> Neighbor Interface Uptime/Expires Ver DR
>> Address
>> Prio/Mode
>> 33.33.44.8 Ethernet0/1 01:53:25/00:01:41 v2 N / DR
>> 33.33.44.5 Ethernet0/1 01:53:25/00:01:35 v2 1 / S
>> 33.33.22.3 Serial1/0 01:53:47/00:01:22 v2 1 / S
>> 33.33.22.4 Serial1/0 01:53:53/00:01:40 v2 1 / DR
>> S
>>
>>
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>>
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>
>
> --
> Regards,
>
> Joe Astorino - CCIE #24347 R&S
> Technical Instructor - IPexpert, Inc.
> Cell: +1.586.212.6107
> Fax: +1.810.454.0130
> Mailto: jastorino_at_ipexpert.com
>

-- 
Regards,
Joe Astorino - CCIE #24347 R&S
Technical Instructor - IPexpert, Inc.
Cell: +1.586.212.6107
Fax: +1.810.454.0130
Mailto:  jastorino_at_ipexpert.com
Blogs and organic groups at http://www.ccie.net