Hi,
I have spent too much time on this now and need help. I am trying to configure a voice VLAN on an SG300-28p switch. I need to instruct a Cisco 7965 phone connected to a port on SG300-28p to use VLAN 100, and a workstation connected to the Cisco 7965 phone to use be placed on VLAN 101 by SG300-28p. In regular Cisco IOS switches, this task is configured as follows:
interface gi25
switchport mode access
switchport access vlan 101
switchport voice vlan 100
Trying to achieve this scenario with a Cisco SG300 switch is turning into a nightmare. You have to deal with a Dynamic Voice VLAN set to the Auto Voice VLAN mode. Then, you have to have a trigger configured and Auto Smartport enabled. I have tried to do this in CLI to no avail. The Cisco 7965 receives an IP from the access VLAN on interface Gi15, which is VLAN 101. I need it to receive an IP from VLAN 100.
The current configuration under interface Gi15 is as follows:
interface gigabitethernet15
storm-control broadcast enable
storm-control broadcast level kbps 10
storm-control include-multicast
port security discard trap 60
port security max 10
port security mode max-addresses
spanning-tree portfast
lldp med disable
switchport mode access
switchport access vlan 101
!next command is internal
macro auto smartport dynamic_type unknown $native_vlan 101 $voice_vlan 100
Now, I have no idea how the macro auto smartport dynamic_type unknown $native_vlan 101 $voice_vlan 100 command got in the config, and I don't know how to remove it.
When I try to enter the macro auto smartport type ip_phone_desktop command under interface Gi15, I get the following error message:
Macro parameter $voice_vlan is not user configurable
It appears as though the standard auto smartport macro ip_phone_desktop cannot apply the $voice_vlan parameter with the value 100. As a matter of fact, I am not explicitly using this parameter at all in the macro auto smartport type ip_phone_desktop command; however, the SG300 switch knows that the its voice VLAN is VLAN 100, and as it is trying to use this VLAN ID as the value of the $voice_vlan parameter, the macro fails.
I tried to statically configure the voice VLAN on the SG300 switch by using the voice vlan id 100 command, but I could not get the ip_phone_desktop macro to configure inerface Gi15 properly. Then, I removed the voice vlan id 100 command and got SG300 to learn its voice VLAN ID from UC560 connected to SG300 via a trunk port based on the following UC560's trunk port (connected to SG300) configuration:
switchport trunk native vlan 101
switchport mode trunk
switchport voice vlan 100
macro description cisco-switch
It is the switchport voice vlan 100 command that advertises to SG300 via CDP that VLAN 100 is a voice VLAN. When I issue the show voice vlan local command on the SG300, I get the following output:
VLAN-ID VPT DSCP Source MAC Address Interface
1 5 46 default ---- ---
*100 CDP e0:5f:b9:xx:yy:zz gi28
So, it is clear that the SG300 is receiving information from UC560 via CDP into port Gi28 that VLAN 100 is the voice VLAN. Nevertheless, I still cannot apply the ip_phone_desktop macro to SG300's interface Gi15.
By the way, I have tried to configure voice vlan state auto-triggered as well as voice vlan state auto-enabled global configuration mode commands. Neither setting changes anything vis-a-vis voice VLAN advertised to Cisco 7965 in that Cisco 7965 continues to use VLAN101 (access VLAN assigned to interface Gi15).
