Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 359
  • Last Modified:

Switch Port Settings

I have Cisco 2960 POE switches.
I want ot connect my Cisco IP phones to these switch ports.
I would like to check what is the recommended port settings on Cisco switches.
Should it be Speed Atuo Duplex auto or speed 100 Mbps duplex full.
What is the settings recommended by Cisco
0
SrikantRajeev
Asked:
SrikantRajeev
  • 3
  • 3
  • 2
  • +2
1 Solution
 
Don JohnstonInstructorCommented:
Cisco defaults to auto.  
0
 
ipajonesCommented:
...and I would recommend leaving duplex and speed setting on auto.
0
 
SrikantRajeevAuthor Commented:
why would you recommend auto
is there any document from cisco which states it
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
Don JohnstonInstructorCommented:
You can use any setting you want (as long as it matches). Auto is just easiest.
0
 
ipajonesCommented:
Remember as @donjohnston has stated if you change the duplex or speed from the default auto setting then BOTH ENDS of the connection need to use the same settings.
0
 
rochey2009Commented:
Make sure both ends are the using the same setting otherwise a duplex mismatch will occur.
0
 
Marius GunnerudSenior Systems EngineerCommented:
I would not recommend using auto to anyone unless there was a specific reason for it. auto defaults to half duplex which means that collisions may occur on that link.
As a few other have stated hard code both ends of the link to speed 100 duplex full.
0
 
ipajonesCommented:
if dupex and speed settings left as the default which is auto and an ip phone is connected to the port it wouldn't set to half-duplex ??
0
 
Marius GunnerudSenior Systems EngineerCommented:
The problem with auto negotiate is that both sides of the link need to autonegotiate the duplex. If one side is hard coded and the other side is auto-negotiate the auto negotiate will not see a port trying to also auto-negotiate at the other end and will therefore fall back to speed 100 duplex half. For auto-negotiate to work, both ends of the link need to be configured to auto-negotiate.

If both sides are set to auto-negotiate and both devices are restarted for whatever reason, there is a chance that they will not auto-negotiate correctly resulting also in a duplex mismatch.

Given technology is improving on a daily basis, but for now my advice is to hard code the speed and duplex on both sides of the link, that way you know for sure they are set to what they are supposed to be set to.
0
 
Don JohnstonInstructorCommented:
Cisco phones default to auto.
Cisco switches default to auto.

Auto to auto on Cisco equipment works.

If you want to change it, fine. Just change on both devices.
0
 
SrikantRajeevAuthor Commented:
Thanks
0

Featured Post

Automating Your MSP Business

The road to profitability.
Delivering superior services is key to ensuring customer satisfaction and the consequent long-term relationships that enable MSPs to lock in predictable, recurring revenue. What's the best way to deliver superior service? One word: automation.

  • 3
  • 3
  • 2
  • +2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now