From: Packet Man (ccie2b@hotmail.com)
Date: Tue Feb 17 2004 - 14:16:07 GMT-3
Ok, I think I'm getting it now. But, just one more question.
When you say a "full mesh of tunnels", do you mean creating 1 tunnel to
connect the spokes so they can form an adj or do you mean a total of 3
tunnels?
Thanks
>From: "Bob Sinclair" <bsinclair@netmasterclass.net>
>To: "Packet Man" <ccie2b@hotmail.com>
>Subject: Re: ISIS on F/R NBMA
>Date: Tue, 17 Feb 2004 11:28:14 -0500
>
>PM,
>
>This is kind of a "lab-only" hack to to make it work. The idea is that you
>have two very separate kinds of adjacencies, level-1 and level-2.
>
>If one spoke is level-1 and the other is level-2, then they do not need to
>form an adjacency spoke-to-spoke. The hub will be a level-1-2, and will
>form a level-1 with spoke A (same area) and a level-2 with spoke B
>(different area).
>
>It does work, it just does not scale beyond two spokes.
>
>Does that help?
>
>Bob Sinclair
>CCIE #10427, CISSP, MCSE
>www.netmasterclass.net
>
>
>
>----- Original Message -----
>From: "Packet Man" <ccie2b@hotmail.com>
>To: <bsinclair@netmasterclass.net>; <ejfeliz65@yahoo.com>;
><ccielab@groupstudy.com>
>Sent: Tuesday, February 17, 2004 11:20 AM
>Subject: Re: ISIS on F/R NBMA
>
>
> > Hi Bob,
> >
> > I liked your response, but I don't understand why your 3rd solution
>would
> > work. Also, if there were a level-1 adj with one spoke and a level-2
>adj
> > with the other spoke, can I infer that if there were a level-2 adj with
>both
> > spokes that would also work or is there something special about having 1
> > level-1 and 1 level-2 adj with each spoke?
> >
> > Also, suppose there were both level 1 and 2 adj with each spoke. why
>would
> > that work or not work?
> >
> > Thanks
> >
> >
> > >From: "Bob Sinclair" <bsinclair@netmasterclass.net>
> > >Reply-To: "Bob Sinclair" <bsinclair@netmasterclass.net>
> > >To: "edgar feliz" <ejfeliz65@yahoo.com>, <ccielab@groupstudy.com>
> > >Subject: Re: ISIS on F/R NBMA Date: Tue, 17 Feb 2004 10:32:49 -0500
> > >
> > >Edgar,
> > >
> > >ISIS routers on a broadcast network must form a full-mesh of
>adjacencies.
> > >This is not possible with a hub-and-spoke frame-relay topology, because
>the
> > >multicasts used to form the adjacencies have a ttl of 1 (do not get
> > >forwarded by the hub).
> > >
> > >This is unlike OSPF, where the spokes only need to be adjacent with the
>DR,
> > >which can be located at the hub.
> > >
> > >One solution, of course, would be a full-mesh of PVCs. Another would
>be
>a
> > >full mesh of tunnels. Another might be a hub with just 2 spokes, where
>the
> > >hub does a level-1 adjacency with one spoke and a level-2 adjacency
>with
> > >the
> > >other.
> > >
> > >HTH,
> > >
> > >Bob Sinclair
> > >CCIE #10427, CISSP, MCSE
> > >www.netmasterclass.net
> > >
> > >----- Original Message -----
> > >From: "edgar feliz" <ejfeliz65@yahoo.com>
> > >To: <ccielab@groupstudy.com>
> > >Sent: Tuesday, February 17, 2004 10:10 AM
> > >Subject: ISIS on F/R NBMA
> > >
> > >
> > > > Has anyone gotten ISIS to work over Frame-Relay configured on the
>main
> > >interface with map statements. here is the hub router config. I have
>three
> > >spokes my looback are seen by the hub router but the spokes don't see
>the
> > >loopbacks of the other spokes only the hubs.
> > > >
> > > > I should see 192.168.1.1 and 192.168.2.2 on the sh ip route of
>router
>r4
> > >but as you'll see below it is not working.
> > > >
> > > > interface Serial0/0
> > > > ip address 150.50.100.3 255.255.255.248
> > > > ip router isis
> > > > ip pim nbma-mode
> > > > ip pim sparse-mode
> > > > encapsulation frame-relay
> > > > ip igmp join-group 224.0.1.40
> > > > no fair-queue
> > > > clockrate 256000
> > > > isis priority 127
> > > > frame-relay map clns 402 broadcast
> > > > frame-relay map clns 406 broadcast
> > > > frame-relay map clns 403 broadcast
> > > > frame-relay map ip 150.50.100.1 402 broadcast
> > > > frame-relay map ip 150.50.100.2 403 broadcast
> > > > frame-relay map ip 150.50.100.4 406 broadcast
> > > > frame-relay lmi-type cisco
> > > >
> > > >
> > > > Sh ip route os one spoke..................................
> > > > 117.0.0.0/24 is subnetted, 1 subnets
> > > > S 117.17.17.0 is directly connected, Null0
> > > > 116.0.0.0/24 is subnetted, 1 subnets
> > > > S 116.16.16.0 is directly connected, Null0
> > > > 172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
> > > > i L1 172.16.136.0/26 [115/20] via 150.50.100.3, Serial0/0
> > > > i L1 172.16.35.0/30 [115/20] via 150.50.100.3, Serial0/0
> > > > 192.168.4.0/32 is subnetted, 1 subnets
> > > > C 192.168.4.4 is directly connected, Loopback0
> > > > 192.168.5.0/32 is subnetted, 1 subnets
> > > > i L1 192.168.5.5 [115/30] via 150.50.100.3, Serial0/0
> > > > 13.0.0.0/24 is subnetted, 1 subnets
> > > > B 13.13.13.0 [200/0] via 192.168.3.3, 00:10:12
> > > > 14.0.0.0/24 is subnetted, 1 subnets
> > > > B 14.14.14.0 [200/0] via 192.168.3.3, 00:10:13
> > > > 150.50.0.0/29 is subnetted, 1 subnets
> > > > C 150.50.100.0 is directly connected, Serial0/0
> > > > 192.168.3.0/32 is subnetted, 1 subnets
> > > > i L1 192.168.3.3 [115/20] via 150.50.100.3, Serial0/0
> > > > r43620#
> > > >
> > > >
> > > > Thanks Edgar
> > > >
> > > >
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