Problem found with Cisco 2960 PoE awitches and Polycom VVX201 phones
what has happened is a little weird.
we configured these two cisco switches and they have been working fine with the phones all this time
then mid last week we found that several of the phones stopped working!
I have checked the configuration and cannot find the problem and was hoping having more eyes look into it will help
I have attached both configurations to this ticket
all help is GREATLY appreciated
FYI due to restrictions in types of files we can upload, I renamed the files with a .txt extension; please rename back .cfg and this will enable you to see the complete configuration
propmatt-1.txt
propmatt-2.txt
we configured these two cisco switches and they have been working fine with the phones all this time
then mid last week we found that several of the phones stopped working!
I have checked the configuration and cannot find the problem and was hoping having more eyes look into it will help
I have attached both configurations to this ticket
all help is GREATLY appreciated
FYI due to restrictions in types of files we can upload, I renamed the files with a .txt extension; please rename back .cfg and this will enable you to see the complete configuration
propmatt-1.txt
propmatt-2.txt
ASKER
the phones will not boot up, no ip from dhcp server
no vlan (I actually got phones working on switch 2 by removing vlan1 entries on all fast ethernet ports)
I do not think it is the DHCP server as any other devices plugged into any port get IP addresses and can get to the internet
each switch connects directly to firewall with their own separate ip address, I do not think it is DNS as stated above all other devices work on both switches without any issues
it seems now that the phones will only work if plugged into the first 14 ports as I move past 14 they start the issue again
no vlan (I actually got phones working on switch 2 by removing vlan1 entries on all fast ethernet ports)
I do not think it is the DHCP server as any other devices plugged into any port get IP addresses and can get to the internet
each switch connects directly to firewall with their own separate ip address, I do not think it is DNS as stated above all other devices work on both switches without any issues
it seems now that the phones will only work if plugged into the first 14 ports as I move past 14 they start the issue again
It doesn't make sense to have switchport voice vlan 1 AND have the access vlan be vlan 1. Voice vlan should be used if the access vlan and voice vlan are different. The phones typically have a switch built in them and will assign themselves to the voice vlan and handoff the access vlan to whatever device is hanging off the back of them.
I would also watch with bpdu-guard because if they do send bpdus it could shut the port down. In my experience they don't, but something to look at.
I would also watch with bpdu-guard because if they do send bpdus it could shut the port down. In my experience they don't, but something to look at.
ASKER
thanks so taking the bpdu-guard out of each port config would be what you are saying here right?
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ASKER
thanks that sounds like a direction I can try
will work on it again port by port
will work on it again port by port
The phones do power on though, right?
Does your DHCP server have addresses available?
Have you tried sniffing a port to see what happens when a phone boots?
Does your DHCP server have addresses available?
Have you tried sniffing a port to see what happens when a phone boots?
ASKER
in response to kevinhsieh
yes the phones power up the PoE is working on all ports that we plug the phones into, DHCP has more than 150 address leases available plus as we found that any other type of device that has an ethernet port picks up an address without issue and is immediately onto the internet
Now I have not tried sniffing the ports to see what happens when the phone boots
I am also wondering if there is a limitation on the amount of PoE phones the switch will handle at a given time. cannot find anywhere reason for the phones working on only the first few ports 1-14.
yes the phones power up the PoE is working on all ports that we plug the phones into, DHCP has more than 150 address leases available plus as we found that any other type of device that has an ethernet port picks up an address without issue and is immediately onto the internet
Now I have not tried sniffing the ports to see what happens when the phone boots
I am also wondering if there is a limitation on the amount of PoE phones the switch will handle at a given time. cannot find anywhere reason for the phones working on only the first few ports 1-14.
Can you do a show version and show inventory?
Also show power inline
ASKER
sorry to get back to this so late...
I will get those results next week when back onsite at client location
thanks again all
I will get those results next week when back onsite at client location
thanks again all
ASKER
was not able to get location where switches were located until a week ago [hurricane Irma]
will be looking to get details
will be looking to get details
What vlan are the phones supposed to be on?
Is the issue possibly with the DHCP server?
Is the issue with DNS?
Are the two switches connected to each other?
Do you have devices plugged into the phones like PCs? Are those working?
Switch configuration looks okay in general, unless the voice VLAN is supposed to be something other than 1.