11-08-2002 08:08 AM - edited 03-02-2019 02:45 AM
1. 3550-T 10/100/1000 port to T-GBIC WS-G5482 in 3550-48.
These cables work(full duplex, speed 1Gb ):
a. 4 pair Cross-over(1,2<->3,6) (4,5<->7,8)
b. "Classic 10/100" 2 pair Cross-over(1,2<->3,6) (4,5,7,8 straight)
c. Straight (1,2,3,4,5,6,7,8 straight)
2. two 3550-T 10/100/1000 ports inbetween
These cables work(full duplex, speed 1Gb ):
a. 4 pair Cross-over(1,2<->3,6) (4,5<->7,8)
b. "Classic 10/100" 2 pair Cross-over(1,2<->3,6) (4,5,7,8 straight)
There is note about Auto-sense MDI-X in T-GBIC:
http://www.cisco.com/warp/public/cc/pd/si/casi/ca3550/prodlit/gbict_ds.htm
Can somebody clear this issue?
(Namely why classic crossover works with 3550 10/100/1000 ports... and if yes why not straight as it is with T-GBIC?)
11-11-2002 09:04 AM
Here's a link with information on when to use a straight/cross cable:
http://www.cisco.com/univercd/cc/td/doc/product/lan/c2900xl/1000gbic/instnote.htm
11-11-2002 11:55 PM
I'm preaty aware of your suggested shortcut.:)
Read the post again.
I wasn't asking which cable to use...
I was asking :
WHY IT WORKS?!!!!!?
because as you can see you don't need cross between switches to connect T-GBIC!!!
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