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
35 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 6

Expert Comment

by:No More
Comment Utility
show-running config

and

show-interfaces
0
 
LVL 26

Accepted Solution

by:
Predrag Jovic earned 500 total points
Comment Utility
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 26

Expert Comment

by:Predrag Jovic
Comment Utility
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

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
ADCs have gained traction within the last decade, largely due to increased demand for legacy load balancing appliances to handle more advanced application delivery requirements and improve application performance.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
Here's a very brief overview of the methods PRTG Network Monitor (https://www.paessler.com/prtg) offers for monitoring bandwidth, to help you decide which methods you´d like to investigate in more detail.  The methods are covered in more detail in o…

763 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

Need Help in Real-Time?

Connect with top rated Experts

6 Experts available now in Live!

Get 1:1 Help Now