Re: Aggregating channels...

[Henning Brauer <lists-openbsdtech@bsws.de>]

On Mon, Dec 03, 2001 at 07:08:23PM -0700, Ralph Forsythe wrote:
> Plus BGP wouldn't apply here, since *no* ISP will let you run 
> that on DSL.  

Not true. We have one DSL uplink (all others are "real" lines) and run BGP
with them, too. I must admit that this is kinda unusual, though.

> The minimum I've seen allowed is a full T1, and even on a 
> fractional DS3 it takes 5 minutes to suck down the table from upstream w/o 
> other traffic on the line...  Though I must say OC-12's are quick! :-)

For me it is _much_ quicker than 5 minutes over E1's. Never measured
exactly, though.

> I don't even want to think about what would happen to one's connection on 
> something less than a T1 (even a full T1 isn't good) running full-mesh 
> tables when it starts flapping...  ugh.

clueful upstreams do dampening.

> This could be a unique little feature to add to the openbsd routing code, 
> if one were so inclined.  Just need a little (well, maybe not) modification 
> to allow for a switch like 'route add default 0.0.0.0 x.x.x.x pri', '... 
> sec', or something like that.  

Would be usefull, agreed. clean implementation would just use two default
routes with equal metrics. No new attributes required.

Greetz

Henning


-- 
* Henning Brauer, hostmaster@bsws.de, http://www.bsws.de    *
* BS Web Services, Roedingsmarkt 14, 20459 Hamburg, Germany *
Unix is very simple, but it takes a genius to understand the simplicity.
(Dennis Ritchie)