Re: PIM group

From: Sami (sy1977@gmail.com)
Date: Tue Jul 04 2006 - 15:05:09 ART

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Petr,

I am annoncing following RP groups from R3 and R5. R3 is RP for
225.0.0.0and R5 announce RP for all the group other than
225.0.0.0.

I don't see rp mapping for R3 for group 225.0.0.0. Is my access list
having any problem?

R3#show access-lists
Standard IP access list 61
10 permit 225.0.0.0, wildcard bits 0.255.255.255

R5#show access-lists
Standard IP access list 61
10 deny 225.0.0.0, wildcard bits 0.255.255.255
20 permit 224.0.0.0, wildcard bits 15.255.255.255

R5#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)

Group(s) 224.0.0.0/4
  RP 150.1.5.5 (?), v2v1
    Info source: 150.1.3.3 (?), elected via Auto-RP
         Uptime: 00:02:52, expires: 00:02:11
Group(s) (-)225.0.0.0/8
  RP 150.1.5.5 (?), v2v1
    Info source: 150.1.3.3 (?), elected via Auto-RP
         Uptime: 00:00:47, expires: 00:02:12

R3#show ip pim rp mapping
PIM Group-to-RP Mappings
This system is an RP (Auto-RP)
This system is an RP-mapping agent (Loopback0)

Group(s) 224.0.0.0/4
  RP 150.1.5.5 (?), v2v1
    Info source: 150.1.5.5 (?), elected via Auto-RP
         Uptime: 00:03:30, expires: 00:02:50
Group(s) (-)225.0.0.0/8
  RP 150.1.5.5 (?), v2v1
    Info source: 150.1.5.5 (?), elected via Auto-RP
         Uptime: 00:03:30, expires: 00:02:50

On 7/4/06, Sami <sy1977@gmail.com> wrote:
>
> CCO doesn't have any explanation about (-) sign in group field ,
> somebody know why 225.0.0.0/8 is shown as (-) ?
>
> R5#show ip pim rp mapping
> PIM Group-to-RP Mappings
> This system is an RP (Auto-RP)
>
> Group(s) 224.0.0.0/4
> RP 150.1.5.5 (?), v2v1
> Info source: 150.1.3.3 (?), elected via Auto-RP
> Uptime: 00:02:38, expires: 00:02:45
> *Group(s) (-)225.0.0.0/8
> * RP 150.1.5.5 (?), v2v1
> Info source: 150.1.3.3 (?), elected via Auto-RP
> Uptime: 00:00:14, expires: 00:02:41
> R5#
> *Jul 4 16:44:47.014: Auto-RP(0): Build RP-Announce for 150.1.5.5,
> PIMv2/v1, ttl 16, ht 181
> **Jul 4 16:44:47.014: Auto-RP(0): Build announce entry for (-)(225.0.0.0/8)
>
> **Jul 4 16:44:47.014: Auto-RP(0): Build announce entry for (224.0.0.0/4)
>
> *Jul 4 16:44:47.014: Auto-RP(0): Send RP-Announce packet on Serial0/0/0
> *Jul 4 16:44: 47.014: Auto-RP(0): Send RP-Announce packet on
> FastEthernet0/0
> *Jul 4 16:44:47.014: Auto-RP(0): Send RP-Announce packet on
> FastEthernet0/1
> *Jul 4 16:44:47.014: Auto-RP: Send RP-Announce packet on Loopback0
> R5#

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