[nSLUG] Router won't do 100mbps locally
nslug at fop.ns.ca
Thu Feb 4 11:18:47 AST 2010
On Thu, 4 Feb 2010, Mike Spencer wrote:
> So, with ethtool, I force both cards to "autoneg off duplex full speed
> 100". The blinkenlights on the router go into continuous twiddle
> mode. No packets are detected by tcpdump. So the cards are trying to
> establish a 100Mbps connection with the router at the Ethernet level
> (right?) and failing (right?).
My vote is for duff cables too, with an outside chance of corrosion on the
connectors on the NIC or cable. Try a crossover cable between the two
machines and see if that works to rule out the switch?
Autonegotiation isn't necessarily all it's cracked up to be, either. The
general recommendation for most applications in the enterprise world is to
hard code the speed on the NIC and the switch rather than relying on
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