Re: PIM Dense mode RP issue

can some one point to any documentation about this feature, as all of my
books are silent about this behaviour.

Best Regards,

nadeem rafi

On Tue, Dec 1, 2009 at 12:56 AM, Roy Waterman <roy.waterman_at_gmail.com>wrote:

> Dont worry bout it :)
>
> From what ive heard/read it was simpler easier to code things this way so
> that 224.0.1.40 always appears, regardless of whether pim-sm or dm is being
> used.
> It has no relevance to PIM DM, its just there :)
>
> Just ignore it.
> Plenty more things to worry about in the lab :)
>
> 2009/11/30 <ron.wilkerson_at_gmail.com>
>
> I could never get that group to disappear. I tried to make it disappear
>> but even though the routers are not configured for auto rp, that darn group
>> still appears.
>>
>> It would be great if someone knows how to turn it off when auto rp isn't
>> being used.
>>
>>
>> -----Original Message-----
>> From: Nadeem Rafi <nrafia_at_gmail.com>
>> Date: Tue, 1 Dec 2009 00:46:04
>> To: Cisco certification<ccielab_at_groupstudy.com>
>> Subject: PIM Dense mode RP issue
>>
>> hi,
>> i am running 3 routers on Ethernet link. all the routers are in pim dense
>> mode but getting reports and messages for 224.0.1.40. As for as i know
>> there
>> is no RP in pim dense mode.
>>
>> R1
>> debug ip igmp
>> *Mar 1 00:33:06.571: IGMP(0): Received v2 Report on FastEthernet0/0 from
>> 155.1.146.6 for 224.0.1.40
>> *Mar 1 00:33:06.575: IGMP(0): Received Group record for group 224.0.1.40,
>> mode 2 from 155.1.146.6 for 0 sources
>> *Mar 1 00:33:06.579: IGMP(0): Cancel report for 224.0.1.40 on
>> FastEthernet0/0
>> *Mar 1 00:33:06.583: IGMP(0): Updating EXCLUDE group timer for 224.0.1.40
>> *Mar 1 00:33:06.583: IGMP(0): MRT Add/Update FastEthernet0/0 for
>> (*,224.0.1.40) by 0
>>
>> RSRack1R1#sh ip igmp interface
>> FastEthernet0/0 is up, line protocol is up
>> Internet address is 155.1.146.1/24
>> IGMP is enabled on interface
>> Current IGMP host version is 2
>> Current IGMP router version is 2
>> IGMP query interval is 60 seconds
>> IGMP querier timeout is 120 seconds
>> IGMP max query response time is 10 seconds
>> Last member query count is 2
>> Last member query response interval is 1000 ms
>> Inbound IGMP access group is not set
>> IGMP activity: 1 joins, 0 leaves
>> Multicast routing is enabled on interface
>> Multicast TTL threshold is 0
>> Multicast designated router (DR) is 155.1.146.6
>> IGMP querying router is 155.1.146.1 (this system)
>> Multicast groups joined by this system (number of users):
>> 224.0.1.40(1)
>>
>> RSRack1R1#sh ip mroute
>> IP Multicast Routing Table
>> Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, C -
>> Connected,
>> L - Local, P - Pruned, R - RP-bit set, F - Register flag,
>> T - SPT-bit set, J - Join SPT, M - MSDP created entry,
>> X - Proxy Join Timer Running, A - Candidate for MSDP Advertisement,
>> U - URD, I - Received Source Specific Host Report,
>> Z - Multicast Tunnel, z - MDT-data group sender,
>> Y - Joined MDT-data group, y - Sending to MDT-data group
>> Outgoing interface flags: H - Hardware switched, A - Assert winner
>> Timers: Uptime/Expires
>> Interface state: Interface, Next-Hop or VCD, State/Mode
>>
>> (*, 224.0.1.40), 00:17:48/00:02:47, RP 0.0.0.0, flags: DCL
>> Incoming interface: Null, RPF nbr 0.0.0.0
>> Outgoing interface list:
>> FastEthernet0/0, Forward/Dense, 00:17:48/00:00:00
>>
>> RSRack1R1#sh ip pim int
>>
>> Address Interface Ver/ Nbr Query DR DR
>> Mode Count Intvl Prior
>> 155.1.146.1 FastEthernet0/0 v2/D 2 30 1
>> 155.1.146.6
>>
>> I cannot understand this behaviour any help will be appreciated.
>>
>> Best Regards,
>>
>> Nadeem Rafi
>>
>>
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>
>
> --
> Regards
> Roy

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Received on Tue Dec 01 2009 - 01:05:23 ART