09-25-2012 06:10 PM - edited 03-16-2019 01:23 PM
I have a non-Cisco ip phone that works. After making three more new wall ports Hot with POE and VOIP, I moved the working ip phone to one of the three new switch ports. The phone powers up and displays a crc error. The Cisco 2960S port goes green, but the phone does not work.
This is a non-Cisco PBX with proprietary DHCP...
Any ideas?
09-25-2012 09:12 PM
Possibly cabling issue.
Try this command
=test cable tdr int
And then show cable tdr int
From the out put see if pair c is normal or open. If its open the possible a cabling issue.
It suppose to be normal.
Please rate if this helps
thanks
09-26-2012 07:37 AM
I get the above symptom plugging directly into the 2960S switch.
The port where i plugged into the phone was configured like this:
switchport trunk allowed vlan 1,2
switchport mode trunk
switchport nonegotiate
priority-queue out
mls qos trust cos
spanning-tree portfast trunk
spanning-tree bpduguard enable
switchport trunk allowed vlan 1,2
switchport mode trunk
switchport nonegotiate
priority-queue out
mls qos trust cos
I then changed it to the below, thinking that the portfast or bpduguard could interrupt the phone registration??
switchport trunk allowed vlan 1,2
switchport mode trunk
switchport nonegotiate
priority-queue out
mls qos trust cos
Any thoughts?
Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE3, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2011 by Cisco Systems, Inc.
Compiled Thu 05-May-11 16:56 by prod_rel_team
Image text-base: 0x00003000, data-base: 0x01B00000
ROM: Bootstrap program is Alpha board boot loader
BOOTLDR: C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(53r)SE, RELEASE SOFTWARE (fc3)
GVS12SW06GBPOE uptime is 15 weeks, 5 days, 1 hour, 33 minutes
System returned to ROM by power-on
System restarted at 06:56:07 cst Fri Jun 8 2012
System image file is "flash:/c2960s-universalk9-mz.122-55.SE3/c2960s-universalk9-mz.122-55.SE3.bin"
09-26-2012 03:53 PM
try this
switchport trunk native vlan XXX (your data vlan)
switchport trunk allowed vlan XXX,XXX
switchport mode trunk
switchport voice vlan XXX (your voice vlan)
srr-queue bandwidth share 1 30 35 5
priority-queue out
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
spanning-tree bpduguard enable
service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY
hope this will help.
thanks
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