Do the 10/100/1000BaseT ports on the Catalyst 4948-10GE support Auto-MDIX like the 3750 does? We have a requirement to connect a 2950 to a 4948-10GE via copper (100BaseT) and need to know whether we can use straight or cross-over cables.
i think 4948 is not supported auto-MDIX. to use the functionality of auto-MDIX you need to configure this future on both the end switch so they can select the appropriate phical cabling. 3750 and 2950 both support auto-MDIX. if your switch support auto-MDIX they you can use any cable but if not then you must have to connect it usin cross-over calbe.
Thanks for the quick reply Devang but it didn't really help....
The 2950 DOESN'T support Auto-MDIX on any of the 10/100BaseT ports. If the 2950 has 10/100/1000BaseT uplinks then a straight cable will work as long as the interface is running at 1Gbps (the 1000BaseT standard takes care of this).
With Auto-MDIX available on either end of the link, either a straight or cross-over cable will work. Without Auto-MDIX a cross-over must be used.
I have checked the documentation and the 2960, 2970, 3560 & 3750 support the Auto-MDIX feature. The 'mdix auto' command doesn't appear to be available on the Catalyst 4500 series (including the 4948-10GE).
I suppose the safest bet is to get cross-over cables since these should work either way.
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