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Re: fractional gigabit ethernet links?
--On Monday, July 15, 2002 10:48 PM -0400 Alex Rubenstein <firstname.lastname@example.org> wrote:
I'm trying to troubleshoot a problem with a fractional (311 mbit/second) gigabit-ethernet line provided to me by a metro access provider. Specifically, it is riding a gig-e port of a 15454. The behavior we are seeing is an occasional loss of packets, adding up to a few percent. When doing a cisco-type ping across the link, we were seeing a consistent 3 to 4 percent loss.
I would definitely recommend using something like iperf, instead of ping if you want to precisely measure your link performance. Ideally you would have two machines on each side of the link to isolate the problem.
Is this link in production? We are using a gigabit ethernet to our provider. We are limited on our traffic going to Commodity traffic, but have free reign on our Internet 2 traffic. We found that we get the best results when we shape/police our traffic to stay within our contractual limits, on our side of the link. Since we are using a 6509 with a Sup1A, we had to do some tricky things to police traffic on only one vlan of an 802.1q trunk on the gigE connection. It works though. We see insignificant losses on the link.
Carnegie Mellon University