[c-nsp] High Density T1 Question

[Matthew Crocker]

> Once upon a time, Matthew Crocker <matthew at crocker.com> said:
>> I have a Seranoa WANPort,  great 1U box,  it takes 12 x DS3 (HDLC,
>> PPP or FR) and converts them into 336 VLANs on a GigE.  The GigE goes
>> into a 7206 NPE-G1 and each VLAN gets an interface on the router.
>
> How do you handle link state monitoring in that kind of setup?  For
> example, we've got some customers with primary/backup links, and we  
> just
> route their IPs to the primary link and the backup link (with a higher
> metric).  When the primary goes down, the route goes with it and the
> backup route takes over.
>
> Do you have to do dynamic routing with customers to get that effect  
> with
> your type of setup?

I use 'ip sla' on the 7206 to handle link state, the 7206 pings the  
customer router and removes routes as needed when the SLA conditions  
aren't met.

--
Matthew S. Crocker
President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710
http://www.crocker.com