3Com to Cisco uplink

Does anyone know if there are specific port settings necessary for a Cisco switch to talk to a 3com switch? I have a 3com 4500 switch which will be the uplink to switch Netgear L3 end with the same exact settings as the Cisco SG300-52 I but with Cisco I can't operate at all.

Any ideas?

Hello Chris,

One thing to check in this case would be auto-negotiation. Try to adjust the speed of the port and to 1000 full duplex or full 100.

If this does not work, I would check the STP parameters. While this doesn't happen often, I saw where two switches will believe they are root bridge and refuse to pass traffic between them.

Tags: Cisco Support

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