Re: genuity - any good?

[Roy <garlic () garlic com>]

You have hit the nail on the head.  I don't argue with route filtering, just the
hoops that I had to go through with Genuity as compared to my other providers.
At the time, the fastest line available in my location was T1 and I was having
to load balance between providers and lines by advertising small pieces out
different lines.


"Martin, Christian" wrote:

> I think the argument is not about route filtering - it is the implementation
> method.
>
> Genuity uses ip extended access-lists.
>
> Everyone else uses prefix-lists.
>
> To a purist, the former is more granular, but performs poorly because it is
> a linked list implementation.  The later, while less granular, performs
> faster by using a trie.  It also allows insertion without list rebuilding.
> Does this matter much?  I'm sure there are some that have tested convergence
> between the two technologies, so I'd welcome comments out of curiosity.
>
> They are somewhat anal with their lists as well.  If you have a /19, but you
> want to deaggregate for inbound BGP TE, you will need to send them EVERY
> route you will send.  That can be 64 subnets.  For a /16, it is waaayyy
> worse.  Then again, it allows them to know exactly how many prefixes MAY be
> announced from their customers, which I suppose has its merits.
>
> chris
>
> > -----Original Message-----
> > From: neil () DOMINO ORG [mailto:neil () DOMINO ORG]
> > Sent: Friday, April 12, 2002 2:08 PM
> > To: garlic () garlic com
> > Cc: matthew () velvet org; nanog () merit edu
> > Subject: Re: genuity - any good?
> >
> >
> >
> > > 1) Their BGP polices are not as good as others.  They force you to
> > > register each route you want to advertise rather than
> > allowing you to
> > > advertise any reasonable route for your prefixes.  According
> > to one of
> > > their top people, prefix-lists were unreliable new technology.  We
> > > gave up and canceled the circuit.
> >
> > Man I don't know of a provider that doesn't do this - but the
> > fact is this is a good thing.