MPLS VPNs or not?
Dave Israel
davei at biohazard.demon.digex.net
Tue Aug 7 16:54:16 UTC 2001
On 8/7/2001 at 17:33:39 +0100, Randy Bush said:
>
> > That would be a rational position, but it can't be accepted by the
> > folks who have a fairly irrational attitude about the subject.
>
> love those ad hominem arguments by the desperate in the defense of clearly
> non-scalable technology. will ad homina be part of 2547bis?
The sad thing here is, you repeated what the complaints are about
in your reply: specifically, you keep telling us it is "clearly
non-scalable," but you also fail to tell us why.
So:
1) 2547bis requires configuration at the ends only, just like any
other IP service in a properly configured network.
2) The routing descriptor space is larger than the IP space, so it
does not present a limiting factor.
3) The BGP mesh requirements are the same as for any other BGP-aware
network (barring implementation issues, which are not a problem
with the protocol itself.) The additional configuration can be
as static or as dynamic as any other IP service.
4) The memory requirements for the additional routes are the same
as for any other IP routes, plus a little overhead for tracking
the routing table. This additional overhead does not appear
to be significant.
Therefore, I would say that 2547bis is clearly scalable, or at least,
as scalable as internet IP service.
-Dave
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