6921 Network Unavailable

[mohammad saeed]

Hi Guys,

I have phone 6921 and gave me network unavailable, I tried to move it to another switch but no hope, my switch 2960s and work fine with all phones, but I have this issue with 3 phones 6921 and 2 phones 8941.

this is the status of port

itEthernet 1/0/23 status

Port Name    Status         Vlan      Duplex    Speed       Type
Gi1/0/23     notconnect     104       auto          auto       10/100/1000BaseTX

Gi1/0/22 auto on 6.0 IP Phone 6921 2 30.0
Gi1/0/23 auto on 6.0 Ieee PD 2 30.0
Gi1/0/24 auto on 6.0 IP Phone 6921 2 30.0

I also found that the Firmware in working phone is 9.2 Active but in phone not working is 9.1 active!

what is the problem here?

Thanks for all

Mohammad Saeed

[Aman Soi]

Hi Saeed,

Found the bug but is your case it is reverse. Can u try changing speed to 100 and duplex to full?

Network Unavailable" on 6921 with 3560 Switch

CSCtr09039

Description

Symptom:
"Network Unavailable" on the Cisco IP Phone 6921
Conditions:
Switchport on the Switch set to anything other than Speed/Duplex : Auto/Auto
Hardcoding the Speed/Duplex on the Phone also doesn't bring the link up.
Workaround:
Set the swtichport to Speed/Duplex : Auto/Auto

Known Affected Releases:

(1)

9.2(1)

regds,

aman

[mohammad saeed]

Hi Aman,

I changed the speed to 100 and duplex to full but still give me Network Unavailable!

Thanks,

Mohammad Saeed

[Aman Soi]

Hi Saeed,

Can u try connecting to any other switch model ?

regds,

aman

[bruno.muniz]

Hi Mohammad.

Have you solved this problem? I have the same problem with 6921 phones. I have a case opened with TAC (since march/2016) but honestly saying it's looks like Cisco doesn't know how to solve it. The bug CSCtr09039 is not applied for me because all access switch ports are set as Auto/Auto.

I've tested so many configurations and firmware's and network switches (2960, 3550, 3560 and 3750) but the problem is still there. The only way that 6921 works without problem is using a local power supply (CUBE3) but it is not the solution of the problem.

I installed the another publisher running the same version and with the same firmware version and there the 6921 is working fine.

I'm running CUCM version 10.5.2.10000-5 (PUB + SUB). Both nodes are installed in host VMWare running ESXi version 5.5U2.

Please let me know if you solve this problem and let me know the result of it,.

Thanks.

Bruno Muniz

[mohammad saeed]

Hi Bruno,

Good news from you, actually in my project I had 3 phones the same issue and after I looked and made comparision between FW version between working and not working I found different versions, but unfortunately I didn't find a chance to update the FW and try. 

My CUCM sub and pub is 8.6 ver. in ESXi 5.5.

But my question is if I was wanted to change th ip phone FW but I can't connect to it how can I do that!

another question bruno! after you installed another pub running the same FW version I couldn't understand this point very wel, could you explain it more, plz?

Thanks

Mohammad Saeed