From: Mark, Detrick (mdetrick@xxxxxxxxx)
Date: Fri Jun 18 1999 - 13:17:09 GMT-3
I have read Jeff Doyle's book and he makes a statement that IS-IS (really
CLNS) can't be done over a point-to-multipoint interface. However, he is
not correct. What will make it work are map statements. Instead of mapping
IP addresses, map the CLNS address to the DLCI.
Mark Detrick
DSL Business Unit
Cisco Systems
2569 McCabe Way
Irvine, CA 92614
----- Original Message -----
From: Derek Fage <DerekF@itexjsy.com>
To: <ccielab@groupstudy.com>
Sent: Friday, June 18, 1999 6:58 AM
Subject: ISIS Routing issues
> Hi there,
>
> I'm now playing with IS-IS routing for IP in my lab (attempting to replace
> an OSPF configuration).
>
> The links are a mixture of ethernet and serial (Frame Relay).
>
> I have no problems with ethernet links, F/R physical or point-to-point
> links, but I do not seem to be able to get a link between a F/R
> point-to-point link on one router to form an adjacency with an F/R
> multipoint link on another router.
>
> On the point-to-point link, the adjacency appears to form (show clns neigh
> displays the remote router as being Up), but on the multipoint router the
> clns neigh seems to stay in Init state.
>
> I cannot find anything talking about F/R issues in the Cisco
documentation,
> and just want to check that I'm not attempting to flog a dead horse here.
> Should this configuration work ?
>
> Extract from configs at end of email
>
> Regards,
>
> Derek...
>
> R1-multipoint-----point-to-point-R1-ethernet-----ethernet-R5
> |
> | f/r point-ro-point
> |
> |
> | f/r physical
> |
> R3
>
> R1
> clns routing
> int s0.1 multipoint
> ip address 172.16.254.1 255.255.255.0
> ip router isis
> frame map ip 172.16.254.2 102 broadcast
> frame map clns 102 broadcast
> int s0.2 point-to-point
> ip address 172.16.253.1 255.255.255.0
> frame-relay interface-dlci 104
> ip router isis
> router isis
> net 00.0002.1111.1111.1111.00
>
> R2
> clns routing
> int e 0
> ip address 172.16.5.2 255.255.255.0
> ip router isis
> int s0.1 point-to-point
> ip address 172.16.254.2 255.255.255.0
> frame-relay interface-dlci 201
> ip router isis
> router isis
> net 00.0002.2222.2222.2222.00
>
> R5
> clns routing
> int e 0
> ip address 172.16.5.5 255.255.255.0
> ip router isis
> router isis
> net 00.0002.5555.5555.5555.00
>
> R3
> clns routing
> int s0
> ip address 172.16.253.3 255.255.255.0
> encaps frame-relay
> frame-relay map ip 172.16.253.1 103 broadcast
> frame-relay map clns 103 broadcast
> ip router isis
> router isis
> net 00.0004.4444.4444.4444.00
>
>
>
>
>
>
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