[c-nsp] Untagged native VLAN...

[Mack McBride]

You need to allow vlan 402 as well as vlan 498.
You should also be able to use the 'switchport voice vlan' command without the switchport trunk commands.

Mack
Network Architect

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Elmar K. Bins
Sent: Tuesday, November 23, 2010 9:36 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Untagged native VLAN...

After a lot of fiddling around and getting nowhere, I'll ask you :)

I am trying to set up a test port - for an IP phone actually - with the office WS VLAN (402) native untagged, and the Voice VLAN (498) tagged on this 3560-48 (12.2(25)SEE4).

My config looks like this:

#sh run int f0/44
interface FastEthernet0/44
 description ekb Testport
 switchport access vlan 402
 switchport trunk encapsulation dot1q
 switchport trunk native vlan 402
 switchport trunk allowed vlan 498
 switchport mode trunk
 load-interval 30
end

#sh vlan dot1q tag native
dot1q native vlan tagging is disabled

#sh int f0/44 switchport
Name: Fa0/44
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 402 (VL-workstation) Trunking Native Mode VLAN: 402 (VL-workstation)
Administrative Native VLAN tagging: enabled		# !!!
Voice VLAN: none
Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk Native VLAN tagging: enabled Administrative private-vlan trunk encapsulation: dot1q Administrative private-vlan trunk normal VLANs: none Administrative private-vlan trunk private VLANs: none Operational private-vlan: none Trunking VLANs Enabled: 498 Pruning VLANs Enabled: 2-1001 Capture Mode Disabled Capture VLANs Allowed: ALL

Protected: false
Unknown unicast blocked: disabled
Unknown multicast blocked: disabled
Appliance trust: none


The "enabled" in the output seems to be the show's mistake, if a few web pages are to be believed, but...

The trunk link to the phone works nicely, but connecting a stupid win xp laptop (phone removed from in between) does not seem to work.

Wireshark shows me outgoing broadcast packets (DHCP queries) from my laptop untagged. I see no responses coming in though.

Does anyone have an idea where I could find the culprit...?

Cheers,
	Elmar.

-- 

"Machen Sie sich erst einmal unbeliebt. Dann werden Sie auch ernstgenommen."
							     (Konrad Adenauer)

--------------------------------------------------------------[ ELMI-RIPE ]---