Re: AMS-IX problems

["James A. T. Rice" <james_r-nanog () jump org uk>]

On Wed, 23 Oct 2002, Stephen J. Wilcox wrote:

> > It's very interesting to see the traffic stats at
> > http://www.ams-ix.net/hugegraph.html Usually, incoming and outgoing
> > traffic is the same. But during this problem, much more traffic went out
> > than came in.
> Curious, as the exchange sources no traffic that shouldnt really be
> possible ;)

Unicast traffic comes in, mac forwarding table is checked and traffic
forwarded to the appropriate port. 1 byte in, 1 byte out. Port goes down
(or spanning tree sends it to blocking), all mac entries for that port are
removed, and traffic for those macs is now sent to all ports. 1 byte in,
lots of bytes out.

James