I have three Tandberg C20 codecs at our office. I have our network vlan'd with separate client, print, voice (Cisco CUCM phones) and AV vlans. On top of that, I have each of those vlans separated between each floor of our office. This network and the codecs have been in use for the last 3.5 years with no issue.
A few months ago, all of a sudden none of the codecs were able to make or receive any video calls. After a reboot of the firewall (ASA 5510) two of the three codecs started working again. The third still has issues, hence this post. At this point, the problematic codec is having trouble even getting on the network. Here's the strangeness:
- When put on its AV vlan for its floor (vlan 415) it cannot talk on the network with a static IP
- When moved to another AV vlan from another floor, one that one of the other codecs are on and are working, it cannot talk on the network with a static IP for that vlan
- When put on a voice subnet used for the phones (using the switchport config "switchport voice vlan xxx") it gets a dhcp address and is accessible. The interesting thing on that, is that switchport config had both swtichport vlan configs on it like this:
interface GigabitEthernet5/41
switchport access vlan 401
switchport mode access
switchport nonegotiate
switchport voice vlan 410
auto qos voip cisco-phone
qos trust device cisco-phone
spanning-tree portfast
service-policy input AutoQos-VoIP-Input-Cos-Policy
service-policy output AutoQos-VoIP-Output-Policy
end
When the codec went on that switchport with that config, it went on the voice vlan of 410 and got a dhcp address for that vlan instead of going on vlan 401 and getting a dhcp address on that.
- When put on a client vlan (like vlan 401 from above config) with dhcp configured and no voice vlan configured, it will not get a dhcp address
I just don't get it. I used two different switchports on the floor's access switch, tried multiple static IP addresses on each of the other vlans. It seems the ONLY way this codec will talk on the network is putting it on the voice vlan with that switchport config. I have other devices on that AV vlan that don't have any problem talking on the network. It's only this codec. I'm just wondering if there's something in the config of this codec creating this problem, but nothing stood out to me looking through it.
Codec is on version 6.0.1
original switchport config:
interface GigabitEthernet5/41
switchport access vlan 415
switchport mode access
spanning-tree portfast
end
vlan interface config
interface Vlan415
description 19th floor av network
ip address 10.19.15.2 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
no ip mroute-cache
standby 0 ip 10.19.15.1
standby 0 priority 105
standby 0 preempt
standby 0 authentication xxx
end
Any ideas is greatly appreciated. Let me know if you would like any other details. Thanks!
