From: Piotr (usaccie@gmail.com)
Date: Thu Nov 27 2008 - 00:21:43 ARST
doc cd mcast command ref
http://www.cisco.com/en/US/docs/ios/ipmulti/command/reference/imc_04.html
ip pim dr-priority
To set the priority for which a router is elected as the designated router
(DR), use the *ip pim dr-priority *command in interface configuration mode.
To disable this function, use the *no* form of this command.
*ip pim dr-priority **priority-value *
no *ip pim dr-priority **priority-value *
Syntax Description
*priority-value*
Value in the range from 0 to 4294967294 used to determine the priority of
the router to be selected as the DR.
Defaults
The command is disabled.
Command Modes
Interface configuration
Command History
Release
Modification
12.1(2)T
This command was introduced.
Usage Guidelines
When a DR is a candidate for election, the following conditions apply:
The router with the highest priority value configured on an interface will
be elected as the DR. If this priority value is the same on multiple
routers, then the router with the highest IP address configured on an
interface will be elected as the DR.
If a router does not advertise a priority value in its hello messages, the
router is regarded as having the highest priority and will be elected as the
DR. If there are multiple routers with this priority status, then the router
with the highest IP address configured on an interface will be elected as
the DR.
Examples
The following example sets the DR priority value of the Ethernet0 interface
to 200:
interface Ethernet0
ip address 10.0.1.2 255.255.255.0
ip pim dr-priority 200
On Wed, Nov 26, 2008 at 9:09 PM, Mark Stephanus Chandra <
mark.chandra@gmail.com> wrote:
> Guys
>
>
>
> I have this topology
>
>
>
>
>
> R3 S1/0------------------R5-----------R4-Fa0/1------ip igmp join-group
> 228.28.28.28
>
> ------------------R1
>
>
>
> R3 have multipoint interface , with frame-relay, I hope my drawing could be
> understand,
>
>
>
> Multicast we all do with Sparse mode with R5 as the auto-rp mapping agent
> and the auto-rp
>
>
>
> So, I have to test connectivity from r1, I have Ip pim nbma mode int the
> interface s1/0 of R3.
>
>
>
> But The R1 still cannot ping to R4 group 228.28.28.28.
>
>
>
> So after confusion, I tried this command on r3s1/0 "ip pim dr-priority 200"
> (my friend told me)
>
>
>
> and IT WORKS.
>
>
>
> So what is ip pim DR-priority 200 means ? Why is this solution never come
> in
> IEWB Workbooks (AS FAR As I know, sorry if this solution actually appear in
> IEWB WOrkbooks, please give me the lab number, I want to learn more.)
>
>
>
> Please help Guys
>
>
>
> Thanks
>
>
>
> Regards
>
>
>
> Mark Stephanus Chandra
> IT Consultant
> EX Computindo
>
>
> 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
This archive was generated by hypermail 2.1.4 : Mon Dec 01 2008 - 08:18:32 ARST