From: Gianpietro Lavado (gianpietro1@gmail.com)
Date: Wed May 31 2006 - 23:19:25 ART
Once I had a similar problem with a 3550 in an NMC CheckIT lab, after some
troubleshooting I realized that the switch was receiving all multicast
packets as CRCs, the fastEthernet interface had one CRC for each multicast
packet (except for EIGRP packets -> ??)
I never figured out what happened there, and haven't had the opportunity to
lab it up yet. Maybe this is a similar problem?
On 5/31/06, Radoslav Vasilev <deckland@gmail.com> wrote:
>
> Yes,
>
> As this is 3750:
>
> ip multicast-routing distributed
> ip routing
>
>
>
> On 5/31/06, Brian McGahan <bmcgahan@internetworkexpert.com> wrote:
> >
> > Are you sure IP routing and IP Multicast routing are enabled on the
> > switch?
> >
> >
> >
> > Brian McGahan, CCIE #8593
> >
> > bmcgahan@internetworkexpert.com
> >
> >
> >
> > Internetwork Expert, Inc.
> >
> > http://www.InternetworkExpert.com <http://www.internetworkexpert.com/>
> >
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> >
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> >
> >
> > ------------------------------
> >
> > *From:* Radoslav Vasilev [mailto:deckland@gmail.com]
> > *Sent:* Wednesday, May 31, 2006 6:37 AM
> > *To:* Brian McGahan
> > *Cc:* srdja blagojevic; Cisco certification
> >
> > *Subject:* Re: AutoRP on a single subnet issue
> >
> >
> >
> > interface Vlan258
> > ip address 141.1.0.8 255.255.255.0
> > ip pim sparse-dense-mode
> > no ip mroute-cache
> > end
> >
> > Rack1SW2#sh deb
> > IP multicast:
> > PIM Auto-RP debugging is on
> > Rack1SW2#term mon
> > % Console already monitors
> > Rack1SW2#
> > Rack1SW2#
> >
> > nothing...
> >
> > i tried also :
> >
> > conf t
> > ip multicast cache-headers
> >
> > Rack1SW2#sh ip mpacket
> > IP Multicast Header Cache
> > 0 packets received over 00:00:01, cache size: 1024 entries
> > Key: id/ttl timestamp (name) source group
> >
> >
> > On 5/31/06, *Brian McGahan* <bmcgahan@internetworkexpert.com> wrote:
> >
> > On the switch's interface connected to the VLAN issue the "no ip
> > mroute-cache" command and then "debug ip mpacket" and "debug ip pim
> > autorp". What does the output here show?
> >
> > Brian McGahan, CCIE #8593
> > bmcgahan@internetworkexpert.com
> >
> > Internetwork Expert, Inc.
> > http://www.InternetworkExpert.com
> > Toll Free: 877-224-8987 x 705
> > Outside US: 775-826-4344 x 705
> > 24/7 Support: http://forum.internetworkexpert.com
> > Live Chat: http://www.internetworkexpert.com/chat/
> >
> >
> > > -----Original Message-----
> > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of
> > > Radoslav Vasilev
> > > Sent: Tuesday, May 30, 2006 5:06 PM
> > > To: srdja blagojevic
> > > Cc: Cisco certification
> > > Subject: Re: AutoRP on a single subnet issue
> > >
> > > Doesn't help!
> > >
> > >
> > >
> > > On 5/30/06, srdja blagojevic < srdja1@pexim.co.yu> wrote:
> > > >
> > > >
> > > > Radoslave,
> > > >
> > > > can you try with ip pim sparse-dense mode on loopback0 interface of
> > your
> > > > R2
> > > > router?
> > > >
> > > > Srdja
> > > >
> > > > -----Original Message-----
> > > > From: nobody@groupstudy.com [mailto: nobody@groupstudy.com] On
> Behalf
> > Of
> > > > Radoslav Vasilev
> > > > Sent: Tuesday, May 30, 2006 21:08
> > > > To: Cisco certification
> > > > Subject: AutoRP on a single subnet issue
> > > >
> > > > Hi Group,
> > > >
> > > > The following issue drives me bananas. Part of my multicast task is
> > to
> > > > configure AutoRP and am currently trying to achieve this on a single
> > > > subnet
> > > > over VLAN 258.
> > > > Three routers there - R2, R5, and Switch2.
> > > >
> > > > I'm trying to configure R2 as both a candidate RP and mapping agent:
> > > >
> > > > ip pim send-rp-announce Loopback0 scope 20 interval 10 ip pim
> > > > send-rp-discovery Loopback0 scope 20
> > > >
> > > > the interface connected to vlan 258:
> > > >
> > > > interface FastEthernet0/0
> > > > ip address 141.1.0.2 255.255.255.0
> > > > ip pim sparse-dense-mode
> > > > duplex auto
> > > > speed auto
> > > >
> > > > interface Loopback0
> > > > ip address 150.1.2.2 255.255.255.0
> > > > ip pim sparse-mode
> > > >
> > > >
> > > > Now, going to Swtich2, which is Cisco 3750, 12.2(25) SEB4:
> > > >
> > > > configuration:
> > > > ip mroute 150.1.2.2 255.255.255.255 141.1.0.2 ip route 150.1.2.2
> > > > 255.255.255.255 141.1.0.2
> > > >
> > > > interface Loopback0
> > > > ip address 150.1.8.8 255.255.255.0
> > > > ip pim sparse-dense-mode
> > > >
> > > > interface Vlan258
> > > > ip address 141.1.0.8 255.255.255.0
> > > > ip pim sparse-dense-mode
> > > >
> > > > Rack1SW2#sh ip pim rp map
> > > > PIM Group-to-RP Mappings
> > > >
> > > > Rack1SW2#sh ip mroute
> > > > (*, 224.0.1.39), 00:15:47/stopped, RP 0.0.0.0, flags: DC
> > > > Incoming interface: Null, RPF nbr 0.0.0.0
> > > > Outgoing interface list:
> > > > Vlan258, Forward/Sparse-Dense, 00:15:47/00:00:00
> > > >
> > > > (150.1.2.2, 224.0.1.39), 00:02:58/00:00:03, flags: PTX
> > > > Incoming interface: Vlan258, RPF nbr 141.1.0.2, Mroute
> > > > Outgoing interface list: Null
> > > >
> > > > (*, 224.0.1.40), 00:16:29/stopped, RP 0.0.0.0, flags: DCL
> > > > Incoming interface: Null, RPF nbr 0.0.0.0
> > > > Outgoing interface list:
> > > > Vlan258, Forward/Sparse-Dense, 00:15:56/00:00:00
> > > > Loopback0, Forward/Sparse-Dense, 00:16:29/00:00:00
> > > >
> > > > (150.1.2.2, 224.0.1.40), 00:15:33/00:02:27, flags: LT
> > > > Incoming interface: Vlan258, RPF nbr 141.1.0.2 , Mroute
> > > > Outgoing interface list:
> > > > Loopback0, Forward/Sparse-Dense, 00:15:33/00:00:00
> > > >
> > > > As seen above, 150.1.2.2 (R2 loopback) is sending discovery
> > messages,
> > > they
> > > > are received on Vlan258 in this switch, but no successfull RP
> > mappings
> > > are
> > > > installed.
> > > >
> > > > Rack1SW2#sh ip route
> > > > S 150.1.5.5/32 [1/0] via 141.1.0.5
> > > > S 150.1.2.2/32 [1/0] via 141.1.0.2
> > > > C 150.1.8.0/24 is directly connected, Loopback0
> > > > B 205.90.31.0/24 [200/0] via 141.1.0.2, 00:16:34
> > > > O*IA 0.0.0.0/0 [110/2] via 141.1.0.5, 00:16:48, Vlan258
> > > > [110/2] via 141.1.0.2, 00:16:48, Vlan258
> > > >
> > > >
> > > >
> > > > debug ip pim autorp doesn't give me any output!
> > > >
> > > > Any ideas?
> > > >
> > > >
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