Solved

Is there a way to check the negotiation speed of a Cisco 2960 port if it is set to auto?

Posted on 2016-11-14
3
70 Views
Last Modified: 2016-11-20
Hello EE,

I am trying to confirm if my port is using 1G if it is set to auto.  Is there a command to see what it is negotiating at?
0
Comment
Question by:operationsIT
  • 2
3 Comments
 
LVL 7

Expert Comment

by:No More
ID: 41886668
show-running config

and

show-interfaces
0
 
LVL 27

Accepted Solution

by:
Predrag Jovic earned 500 total points
ID: 41886670
To check all interfaces:
# show interface status
if you want check single interface:
# show interface gi1/0/1 status
auto negotiated speed and duplex will be with prefix a-, if there is no a- speed is manually configured
a-full  a-1000
a-half a-100
etc

I typically use:
sh run | i interface|speed|duplex

Open in new window

if I want to check if any of ports is configured with speed or duplex command (in a forest of interfaces in is easy to miss a-, or to see that a- is missing )  :)

output
interface GigabitEthernet1/0/1
interface GigabitEthernet1/0/2

Open in new window

would mean that port GigabitEthernet1/0/1 is configured with auto speed (no spaces (commands speed or duplex) between lines)

interface GigabitEthernet1/0/1
 speed 100
interface GigabitEthernet1/0/2
 duplex half

Open in new window

would mean that port GigabitEthernet1/0/1 is configured with command speed 100 and port GigabitEthernet1/0/2 is configured with command duplex half
0
 
LVL 27

Expert Comment

by:Predrag Jovic
ID: 41886693
There can be also output:

interface GigabitEthernet1/0/1
 speed auto 10 100 1000
or
 speed auto 100 1000

That would mean that would mean that speed is set to autonegotiate speed and speeds that can negotiated.

I guess there are some other ways, this should be fast ones. :)
0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

When it comes to security, there are always trade-offs between security and convenience/ease of administration. This article examines some of the main pros and cons of using key authentication vs password authentication for hosting an SFTP server.
This past year has been one of great growth and performance for OnPage. We have added many features and integrations to the product, making 2016 an awesome year. We see these steps forward as the basis for future growth.
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…
In this tutorial you'll learn about bandwidth monitoring with flows and packet sniffing with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're interested in additional methods for monitoring bandwidt…

832 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question