01-03-2008 11:17 AM - edited 03-05-2019 08:16 PM
I setup a new Cisco Switch and when I setup a port on the switch to be in the correct VLAN it dosen't work. My VLANs show up on the switch, but this port will not take it. Here is the port config:
interface FastEthernet0/19
description Admin_Second_Floor_#
switchport access vlan 60
switchport trunk encapsulation dot1q
switchport trunk native vlan 60
switchport mode trunk
switchport voice vlan 20
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
end
And here is the output from the sh vlan command:
60 active Fa0/2, Fa0/4, Fa0/5, Fa0/6
Fa0/8, Fa0/10, Fa0/13, Fa0/18 Fa0/23, Fa0/31, Fa0/32, Fa0/33
Fa0/34, Fa0/35, Fa0/36, Fa0/37
Fa0/38, Fa0/40, Fa0/41, Fa0/42
Fa0/43, Fa0/44, Fa0/45
01-03-2008 11:27 AM
its because you made the port a trunk with the "switchport mode trunk " command. If you want it to be an access port, set it back with the command "switchport mode access".
HTH :-)
01-03-2008 11:30 AM
Mark
Perhaps I am missing something. When you configure the port as a trunk:
switchport mode trunk
what did you expect the switch to do? As a trunk the port is not a member of any specific VLAN but carries traffic from all VLANs.
HTH
Rick
01-03-2008 12:58 PM
I copied the config from a running switch. I just took over this network and have only just gone through the ICND 1 and 2 classes so I am just really learning it. I find it interesting that only this port is having the problems. The users on other ports of the switches don't have this issue. I removed the line and set it back to an access port and it shows up under the correct vlan now, but the device connected to it still dosen't work.
01-04-2008 05:27 AM
Hi,
this is a standard configuration for IP phones. I would suggest trying to add this statement and see if the output changes:
"switchport trunk allowed vlan 20,60"
With the exception of this command, your config is done exactly in the same manner as we do ours. All of our ports come up in the correct VLAN.
Good luck,
Steve
01-04-2008 09:54 AM
I tried that and I was able to ping the device. I removed it and I was still able to ping the device. I changed the VLAN to a different one and now I can't ping the device. I added that line back in and it didn't work. This is the exact config that I have on all my other switches and they work just fine. It is just this one that is acting up. I find that if I change the VLAN it isn't showing up that it is in the correct VLAN when I do a sh vlan.
01-05-2008 01:12 AM
What all is out the interface? If its just the phone, and not a user and the phone, you won't see anyone on 60.
If you really want to simplify it down, all you need is:
switchport mode access
switchport access vlan 60
switchport voice vlan 20
plus your QoS configuration. That's it!
NS
01-05-2008 10:15 AM
I have a printer on the port right now. The wierd thing is that it finally started working. I haven't had this happen before so it's leaving me a little stumped.
01-05-2008 08:35 AM
Note: "sh int trunk" shows you what VLANs will be forwarding on that link. This sounds like the interface configuration may not be the issue here though.
01-18-2008 01:21 PM
I ran the sh int trunk the the interface in question and it shows that it is allowing them to pass through even though it isn't allowing the m to pass through. I noticed that sometimes I can ping the device and other times I can't.
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