What is difference between a-1000 and 1000 in Nexus7000?

[wfqk]

Hi What is difference between a-1000 and 1000 in Nexus7000 when using command show interface status? Please see the below highlighted. Thank you

Eth6/43 dcba connected 500 full a-1000 10/100/1000

Eth6/45 abcd  connected 501 full 1000 10/100/1000

[Iulian Vaideanu · Accepted solution]

If I remember correctly "a-" means auto-negotiated - is there any "speed 1000" in the config of Eth6/45?

[wfqk]

You are right! Thank you

[eversandrews1]

Good Day.

If a indicates that the speed of the interface is auto-negotiate then what is the (D) on a-1000(D) stand for?

Your assistance will be highly appreciated,

[Georg Pauwen]

Hello,

The (D) is the rate mode the interface is in. It means 'rate-mode dedicated'. Have a look at the very good explanation from Steve Fuller in the post linked below:

https://community.cisco.com/t5/switching/interface-explanation-in-nexus/td-p/2420969

[Vishnu Vardhan S]

This is a default behavior in nexus switches. 

By default it take duplex and speed as auto that's why we see "-a" here