From: CCIEin2006 (ciscocciein2006@gmail.com)
Date: Mon Jan 16 2006 - 19:55:35 GMT-3
Thanks but isn't the rp-announce filter unecessary if you are specifying the
groups you want to announce on the rp itself? Or is this more of a fail-safe
mechanism for a misconfigured RP?
On 1/16/06, Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
>
> Actually it is working as expected. The range announced by the
> candidate RP must match the range configured on the mapping agent in the
> rp-announce-filter. The rp-announce-filter is not used to control group
> to rp mappings, but instead is used to globally permit or deny a
> candidate rp's announcements.
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
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>
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of
> > CCIEin2006
> > Sent: Monday, January 16, 2006 3:03 PM
> > To: Cisco certification
> > Subject: rp-announce-filter not working as expected
> >
> > It seems the rp-announce-filter command does not work on ranges of
> group
> > addresses.
> > I am saying this because I have one router announcing the entire
> > 224.0.0.0/4range while the mapping agent has a filter configured for
> > 239.0.0.0/8. A debug shows that the 224.0.0.0/4 is being filtered by
> the
> > mapping agent.
> >
> > See example below:
> >
> > This is the RP ---> (R3)------(R1) <----- This is the mapping agent
> with
> > rp-announce-filter
> >
> > Here are the configs:
> > R3:
> > ip pim send-rp-announce Loopback0 scope 15
> >
> > R1:
> > ip pim send-rp-discovery Serial0/0 scope 15
> > ip pim rp-announce-filter rp-list R3 group-list R3-groups
> > ip access-list standard R3
> > permit 150.1.3.3
> > ip access-list standard R3-groups
> > permit 239.0.0.0 0.255.255.255
> >
> > Debug ip pim auto-rp on R1 shows the following:
> > *Mar 1 23:34:21.671: Auto-RP(0): Received RP-announce, from
> 150.1.3.3,
> > RP_cnt 1, ht 181
> > *Mar 1 23:34:21.671: Auto-RP(0): Filtered 224.0.0.0/4 for RP
> 150.1.3.3
> > *Mar 1 23:34:21.671: Auto-RP(0): Received RP-announce, from
> 150.1.3.3,
> > RP_cnt 1, ht 181
> > *Mar 1 23:34:21.671: Auto-RP(0): Filtered 224.0.0.0/4 for RP
> 150.1.3.3
> >
> > Any idea why R1 is not permitting the 239.0.0.0 range?
> >
> >
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