[c-nsp] OSPF NSSA Question

Brian Feeny signal at shreve.net
Sun Oct 3 23:20:31 EDT 2004

Well, just make sure you plan things well.

Don't forget that whole thing about all iBGP neighbors being meshed.  
With a 100 or so access routers (not sure how many you have), you will 
most certainly want to deploy RR's or Confederations, having to add a 
neighbor statement to 100 access routers every time you added a new one 
would really suck.


On Oct 3, 2004, at 9:18 PM, Dan Armstrong wrote:

> The mroe I think about it, BGP would be a pretty snazzy way to do 
> this... although something bothers me about using BGP as an IGP.... 
> but it obviously scales well, and it can be controlled tightly.... I 
> can't think of any reason why it wouldn't work, other than it is 
> probably significantly slower to reconverge in the event of a failure 
> unless I start munging up the hold timers...
> Jon Lewis wrote:
>> On Sun, 3 Oct 2004, Dan Armstrong wrote:
>>> I guess I am so concerned about large routing tables on the access
>>> routers, since 3550s are not really designed for large routing 
>>> tables.
>>> Each 3550 is attached to each 6509 with a gig link, setup as a trunk,
>>> and vlan interfaces in the 6509 and a vlan interface in the 3550.  
>>> (I am
>>> oversimplifying the design a bit for clarity... each 3550 is actually
>>> hung off of 2 6509s)
>> Your 3550's must be EMI if they're doing OSPF, so why not just 
>> convert to
>> iBGP so you can easily redistribute static/connected from them to the
>> 6509s and only accept/advertise to them a default?
>> ----------------------------------------------------------------------
>> Jon Lewis                   |  I route
>> Senior Network Engineer     |  therefore you are
>> Atlantic Net                |
>> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
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