From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Tue Feb 17 2004 - 20:59:47 GMT-3
You can configure the hub to be L1 adjacent with the spokes
(regardless how many there are), and originate a default to them. The
spokes will not have specific reachability information about each other, but
they can default to the hub. Any L1 information that the hub is learning
from a different interface can also be advertised on to the spokes.
HTH,
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
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Packet Man
> Sent: Tuesday, February 17, 2004 11:20 AM
> To: bsinclair@netmasterclass.net; ejfeliz65@yahoo.com;
> ccielab@groupstudy.com
> 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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