From: Yasser Aly (blackyeyes00@hotmail.com)
Date: Tue Feb 17 2004 - 18:18:02 GMT-3
Hi packet Man,
I guess it will be only 1 tunnel to connect the spokes together in a
scenario of a hub and 2 spokes..
To generalize the idea, if you have a hub and 4 spokes, you will need a
total of 6 tunnels between the spokes to make full mesh and be adjacent to
each other.
Regards,
Yasser
>From: "Packet Man" <ccie2b@hotmail.com>
>Date: Tue, 17 Feb 2004 12:16:07 -0500
>
>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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