Can someone explain the following to me please.All our ip phones are deployed with their settings pc/sw config as auto/auto. Desktops are all on 100fullmb as are the 3750 switch ports they connect to. Mostly all is fine but sometimes I get duplex mismatches on syslog server. When I change phone settings to 100full it resolves. How come this happens on some and not others.
Also what is best practice as we are deploying in other offices now; I would have though everything set to 100full.
Thanks Bob.I am still a little confused as this only happens randomly so I am thinking why isnt it happeening all the time as you say.Are you saying it is best practice to have the swithches on auto/auto and pc's as well.
All our network is setup as below.
All access ports on 3750 switch stacks are set to 100 full.So sw connection on phone is auto/auto; this negotiates with 3750 to 100 full.
PC connects to phone port which is at auto/auto. If pc is set to 100full then it will negotiate to 100full.
If you manually set a port to 100/full then plug in a device set to auto/auto that device will default to 100/half. If you set one device manually you have to set whatever it connects to manually as well. Best practice is to set everything to auto negotiate and that will result in 100/full. In your case you have all devices with a duplex mismatch and you should be having lots of performance and voice quallity issues.
Take a look at this link for details on how ethernet port speed and duplex negotiation works.
The short answer is that you don't.... That isn't entirely true while at
the same time it kind of is, but for the most part you don't configure
the softkeys. You enable or disable them via TCL. Here is the long
answer. Be sure to read the whole thing or e...
Topology: IP Phone > Switches > Microsoft NPS setup to forward 802.1x
proxy to > ISE 2.1 patch 3 Authentication: EAP-TLS using Cisco MIC SANs
Phone Models 802.1X support? 802.1x flavor Addtl Comment EAP-MD5 EAP-TLS
Cisco 3905 Y Y N Cisco 6911 Y Y N Cisco ...
This document describe how DST changes and how time changes are
implemented in DST. Daylight Saving Time (DST) is the practice of
setting the clocks forward 1 hour from standard time during the summer
months, and back again in the fall, in order to make b...