From: Ron (id353@singnet.com.sg)
Date: Mon Nov 04 2002 - 13:45:03 GMT-3
Hi Banlan,
In an IS-IS NBMA environment, all routers must be connected in a point-to-point method. Unfortunately, IS-IS doesn't have much flexibilites when it comes to defining the state of the interface ("ip ospf network" command).
There are 2 types of hellos in an IS-IS network, LAN Hellos and point-to-point hellos. If your hub's FR configuration is in multipoint or the physical interface (defaults to multipoint), then it will be sending L1 and L2 IS-IS LAN Hellos to the spokes which in return sends point-to-point IS-IS Hellos back to the hub. Adjacencies will not be formed.
The only way is to convert the hub to a point-to-point network and all will be well.
HTH.
Ron.
From Banlan Chen <banlan.chen@lycos.com> on 4 Nov 2002:
> Hi Group,
>
> A quick question about isis over NBMA. On the hub and spoke environment,
> is it must to configure hub router as DR like OSPF?
>
> Thanks in advance.
> Banlan
>
>
> __________________________________________________________
> Outgrown your current e-mail service? Get 25MB Storage, POP3 Access,
> Advanced Spam protection with LYCOS MAIL PLUS.
> http://login.mail.lycos.com/brandPage.shtml?pageId=plus&ref=lmtplus
This archive was generated by hypermail 2.1.4 : Tue Dec 03 2002 - 07:22:52 GMT-3