07-29-2009 09:00 PM - edited 03-06-2019 07:00 AM
Hi,
we are having cisco 2960 switch in our network and we are connected 7902 IP Phone and phones are working but when phone power on and off then that port is down and shown that err-disable, we are also do duplex setting on that port stil we are having same problem so how we can resolve this issues ???
07-29-2009 09:16 PM
If you have enabled errdisable recovery, you can determine the reason for the errdisable status if you issue the show errdisable recovery command. Here is an example:
cat6knative#show errdisable recovery
ErrDisable Reason Timer Status
----------------- --------------
udld Enabled
bpduguard Enabled
security-violatio Enabled
channel-misconfig Enabled
pagp-flap Enabled
dtp-flap Enabled
link-flap Enabled
l2ptguard Enabled
psecure-violation Enabled
gbic-invalid Enabled
dhcp-rate-limit Enabled
mac-limit Enabled
unicast-flood Enabled
arp-inspection Enabled
Timer interval: 300 seconds
Interfaces that will be enabled at the next timeout:
Interface Errdisable reason Time left(sec)
--------- --------------------- --------------
Fa2/4 bpduguard 273
One you find the reason, you will be able to fix it.
07-29-2009 10:35 PM
Hi,
I am not enable errdisable recovery command still it's happen if i am enable then also same .?????
07-29-2009 11:51 PM
if the port is err-disabled you can see the reason with:
sh int status err-disabled
07-30-2009 12:03 AM
hi,
I cheked "sh int status err-disabled "
and shown that reason "loopback" on interface but the thing is that port coonected to cisco 7902 IP Phone .
07-30-2009 12:08 AM
Loopback error
A loopback error occurs when the keepalive packet is looped back to the port that sent the keepalive. The switch sends keepalives out all the interfaces by default. A device can loop the packets back to the source interface, which usually occurs because there is a logical loop in the network that the spanning tree has not blocked. The source interface receives the keepalive packet that it sent out, and the switch disables the interface (errdisable). This message occurs because the keepalive packet is looped back to the port that sent the keepalive:
Is the phone directly connected to the switch?
can you post STP related config + interface config
07-30-2009 12:13 AM
hi,
Yes IP phone directly connected to switch and particular that port we are facing problem.? can you advice me which type of configuration i have to do ?
07-30-2009 12:19 AM
for access port
if a pc is connected to the phone and in a different vlan
switchport mode access
spanning-tree portfast
spanning-tree bpdugard enable
switchport access vlan x
switchport voice vlan y
switchport nonegotiate
07-30-2009 12:22 AM
it looks like this is your problem (old document from 2004); 2960 switch is not listed as affected device.
http://www.cisco.com/en/US/ts/fn/610/fn61863.html
Which IOS are you running?
07-30-2009 12:23 AM
hi,
Thank you for this but problem is that we have connected only IPPhone there is no pc ot like that ...only one IPPhone 7902 connected.
07-30-2009 12:24 AM
see previous post
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