[c-nsp] IS-IS on L3 vlan interfaces

Tue May 31 16:31:32 EDT 2011

That makes sense.  The links between these 3 routers are through a
ethernet switched lan provider, who provides us a vlan on their network
(with pretty large mtu sizes), and after sniffing traffic at the various
locations, I decided to just create vlans in order to have a mesh of
point to point circuits.  Works great.

On Tue, 2011-05-31 at 16:25 +0200, Vitkovsky, Adam wrote:
> That makes sense as ISIS p2p adjacency is initialized by rx of a ISHs through the ES-IS protocol followed by the exchange of the IIH
> 
> I was trying to figure out the mac layer mechanism difference between the p2p and lan and your post helped me to fill in the gaps
> Thanks a bunch Olga
> 
> adam
> 
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Olga
> Sent: Tuesday, May 31, 2011 3:03 PM
> To: cisco-nsp
> Subject: Re: [c-nsp] IS-IS on L3 vlan interfaces
> 
> One time we had the same issue  -first wth p2p command configured (removed this command and adjacency came up), and second  -we added p2p command to broadcast link and adjacency came up. Both times the problem was with juniper filtering   -we used transit provider.
> 
> the point is that MAC addreses for Serial and LAN hello are different
> 
> 
> The MAC-level broadcast addresses are:
>       01-80-C2-00-00-15 for Level 2 adjacencies (AllL2ISs)
>       01-80-C2-00-00-14 for Level 1 adjacencies (AllL1ISs)
>   
> The MAC-level point-to-point addresses are:
>       09-00-2B-00-00-04 (AllEndSystems)     
>       09-00-2B-00-00-05 (AllIntermediateSystems)   
> 
> 
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-- 
Walter Keen
Network Engineer
Rainier Connect
Office: 360-832-4024
Cell: 253-302-0194