2851 router auto-mdix question

[cornwallcollege]

Hi All,

I'm just wondering if there is any documentation that confirms if the 2 built-in Gigabit ports on a Cisco 2851 router support (or otherwise) auto-mdix.

I can find information for the modules but not the 2 built-in ports.

Many thanks.

[Oleksandr Nesterov · Accepted solution]

Hi

Yes, routers 2821 and 2851 support MDIX on built-in ports.

Routers 2801 and 2811 doesn't.

HTH,

Alex

[cornwallcollege]

Many thanks Alex.

Is it correct that if you force either the port speed or duplex then auto-mdix is disabled as a result?

[Oleksandr Nesterov]

That depends on the platform.

For catalyst switches auto-mdix is disabled when speed and duplex are not auto.

Alex