SG500-52-K9-NA Voice and Data ?s

[jbpollard]

Just picked up a SG500-52 for the new office addition and we just purchased IP phones. I've configured 1 port with voice vlan 41 and data 100 trunked and the computer and phone both work. Even when I plug the computer directly in the switch it still works even though the port is configured as a trunk and has 2 tagged vlans? How is this working is this a smartport thing?

[Kevin_W · Accepted solution]

Hi jbpollard,

if you are using a phone and a PC at one port you have to configure:
- vlan 41 tagged
- vlan 100 untagged

PCs/Notebooks normally can not tag packets. Thats why the PC vlan need to be untagged.
The IP phone can tag the packets.

On other Cisco switches you can also set the client port as trunk. But then the native vlan on the trunk has to be the vlan where the PC want to get into.

[jbpollard]

Yeah I think that's whats happening as soon as I plug a phone in the smartport sets the port to trunk and has 41T and 100UP. On my dell switch I had to put them in general mode and set my pvid and add vlan 41.

[jbpollard]

Whats the best way to configure the voip set the port mode to general and set the pvid to 100 and add vlan 41?

console(config-if)# switchport mode general

console(config-if)# switchport general pvid 100
console(config-if)# switchport general allowed vlan add 41

Also how would you go about setting up auto voice vlan? Right now my default voice vlan is 1 and my static is 41.

That's the way I have it set now when I plug the phone in it takes a second then I get this output. Port 24 is connected the main voip poe switch.

03-May-2013 10:28:37 %LINK-W-Down: gi1/1/44
03-May-2013 10:28:44 %STP-W-PORTSTATUS: gi1/1/44: STP status Forwarding, aggregated (1)
03-May-2013 10:28:44 %LINK-I-Up: gi1/1/44, aggregated (1)
03-May-2013 10:29:22 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/50.
03-May-2013 10:29:45 %NT_GREEN-W-EeeLldpMultiNeighbours: Multiple LLDP neighbours on port gi1/1/44 - EEE operational state is FALSE

03-May-2013 10:29:55 %CDP-W-NATIVE_VLAN_MISMATCH: Native VLAN mismatch detected on interface gi1/1/24.
03-May-2013 10:31:15 %NT_GREEN-W-EeeLldpSingleNeighbour: Single LLDP neighbour on port gi1/1/44 - EEE operational state can be TRUE

[Kevin_W]

For Cisco switches (e.g. Catalysts) you can configure the port as access port and also add a voice vlan:
switchport mode access
switchport access vlan 100
switchport voice vlan 41

I do not know the commands for Dell switches but for example with 3Com switches you can make the port as a hybrid port:
port link-type hybrid
port hybrid vlan 41 tagged
port hybrid vlan 100 untagged
undo port hybrid vlan 1 (the native vlan)
port hybrid pvid vlan 100

[Brandon Svec]

Probably the computer is picking up DHCP and getting access on the native VLAN 1.  Are you trying to not use VLAN1 or just curious why this works?