not rewriting next-hop, pointing default, ...

Karl Denninger karl at Mcs.Net
Thu Sep 11 22:52:29 UTC 1997

On Thu, Sep 11, 1997 at 12:40:00PM -0800, Randy Bush wrote:
> a senior engineer at a well-known provider just pointed out to us that
> a weenie provider at mae-east was
>   o not rewriting next-hop
>   o sending our routes to others
>   o sending others' routes to us
>   o likely pointing default at us
> their noc phone was answered by a modem.  we suspended peering with them and
> wrote to their noc.  we got back a snotty message.  we have ceased peering
> with them.
> we installed packet filters.  our traffic on the east fddi dropped
> noticeably.
> when the larger providers decline to peer with the smaller, there is a sad
> reason.  traceroute -g is your friend.
> randy

And calling (or treating) all smaller providers (as) scumbags because a few 
do things which should be actionable if they're not (ie: pointing default) 
is worse than the disease.

You don't fix a broken finger by cutting off the entire arm!

Yes, this situation sucks.  Yes, its made worse by "smaller" providers.  
But the fact remains that some of the biggest problems are caused by the
larger providers and the silly things *they* occasionally do, usually for
"cost control" reasons.

The only non-standard thing we do on occasion is prepend an extra copy of
our ASN on announcements which go out to peers or transit links which we
deem "non-optimal".  I don't see that as being particularly onerous,
especially given some of those provider's abysmal track record in actually
*delivering* the packets you send their way.

In a true peer relationship situation this is a no-op unless the place
you're trying to reach is multi-homed (if there's only one path, it matters
not if there's one or three "3365"s in the path -- there's only one path to
select from, and that's it).

In a mixed peer/transit relationship situation this kind of load balancing
is extremely valuable if used with *discretion*.

Karl Denninger (karl at MCS.Net)| MCSNet - Serving Chicagoland and Wisconsin     | T1's from $600 monthly to FULL DS-3 Service
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