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Why Auto-Negotiation Cannot Be Configured ?

MIBS, SMMPv1, SMMPv2, SMMPv3 and management

Why Auto-Negotiation Cannot Be Configured ?

Postby jorna » Tue Feb 07, 2017 5:52 pm

a 100M Optical Module Is Installed and Then Removed From A 100M/1000M Optical Interface on the S5700?

On S5700 switches in versions earlier than V200R001, the default rate of 100M/1000M optical interfaces is 1000 Mbit/s. After a 100M optical module is installed on an optical interface, the optical interface automatically changes the rate to 100 Mbit/s. After the optical module is removed, the optical interface retains the 100 Mbit/s rate. When the rate of an optical interface is 100 Mbit/s, the interface does not support auto-negotiation. The auto-negotiation function cannot be configured. You can run the speed 1000 command or install a 1000M optical module to restore the interface rate to 1000 Mbit/s.

On S5700 switches in V200R001 and later versions, the interface rate of a 100M/1000M optical interface restores the default rate 1000 Mbit/s after the optical module is removed.
jorna
Cisco 2611XM
 
Posts: 125
Joined: Tue Jul 07, 2015 1:23 am

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Re: Why Auto-Negotiation Cannot Be Configured ?

Postby hone » Thu Mar 16, 2017 5:32 pm

This FAQ helps me
hone
Cisco Catalyst 4500
 
Posts: 250
Joined: Thu Jan 07, 2016 1:03 am



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