Can't make Cisco work with my Nortel switch

Answered Question

I have a Nortel Route Switch 8661 and trying to connect to a Catalyst 3750 24 Gig ports.

Have tryied several of the 24 RJ-45 ports and the link doesn't come up.

If I connect a PC to the 3750 then it works. I'm trying to establish a 100Mb link between these two.

Have someone seen this before. Thanks?

Correct Answer by jbrenesj about 7 years 5 months ago

3750 does MDIX so you can use straight-thru cables when connecting to switches together but there is one requirement:

The speed/duplex on the port should be left auto/auto because if you hardcode to a fix speed then MDIX might mis-behave.

Not sure what your settings are on the Cisco switch?

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Reza Sharifi Thu, 10/22/2009 - 13:29
User Badges:
  • Super Bronze, 10000 points or more
  • Cisco Designated VIP,

    2017 LAN

Pc to switch straight through cable


Try using a cross over cable for switch to switch and let us know.


HTH

Reza

Correct Answer
jbrenesj Thu, 10/22/2009 - 13:38
User Badges:
  • Silver, 250 points or more

3750 does MDIX so you can use straight-thru cables when connecting to switches together but there is one requirement:

The speed/duplex on the port should be left auto/auto because if you hardcode to a fix speed then MDIX might mis-behave.

Not sure what your settings are on the Cisco switch?

Jerry Ye Thu, 10/22/2009 - 13:44
User Badges:
  • Cisco Employee,

Did you hard code the switch to 100/FULL? MDIX will not work with hard coding the interface, you have to leave it at AUTO/AUTO.


Regards,

jerry

Actions

This Discussion