Speed and Duplex negotiation on the C2960G

m.lemieux · ‎09-16-2008

Interconnecting a C2960G with other Cisco switches is not workable unless I set the speed/duplex at both end to Auto/Auto. If I hard-code to 100M/FULL, I get no link light at all, but it works fine if I connect to HP or Netgear switches.

This only happens with the C2960G.

merryllem · ‎09-16-2008

check the matrix table in the link below.

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00800a7af0.shtml

glen.grant · ‎09-16-2008

That is because you are using a straight thru cable with the 2960 , switch to switch needs a crossover unless you are using the auto mdix function which will only work as auto/auto and why you do not get a link trying to hardcode . If you feel the need to hardcode use a crossover cable. The hp and netgear switches probably use auto mdix on their end and why it works ok with those switches.

m.lemieux · ‎09-17-2008

Glen, This answers my question. It makes a lot of sense. Thanks!!!