nanog mailing list archives

RE: Linux shaping packet loss


From: "Keith Medcalf" <kmedcalf () dessus com>
Date: Thu, 10 Dec 2009 21:16:57 -0500

Autoneg is a required part of the gig E specification so you'd only be
causing yourself trouble by turning it off. (I don't know if
it'll also break automatic MDI/MDI-X (crossover) configuration, for
an example of something that's nice to have.)

At least on 450x series enhanced linecards, disabling autonegotiation disables auto MDI/MDI-X.  You have to enable 
autonegotiation but you can provide specified offered and acceptable parameters, eg:  "speed auto 100" to enable 
autonegotiation but only allow negotiation of 100 mb.  (speed auto 10 100 / speed auto 1000 / etc)

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