How do you get the VLAN protocol to go ‘up’?
I've forgotten some information on VLAN protocols. I am butting my head against the wall right now trying to get the VLANs on my Cisco 2811 router to change to up/up from up/down. Does anyone know how to get the protocol of a VLAN to go “up”? I’m just plain forgetting it all right now.[o:p][/o:p]
Software/Hardware used:
Software/Hardware used:
ASKED:
November 17, 2009 5:29 PM
UPDATED:
February 18, 2011 2:36 AM
Answer Wiki:
Did you issue the "no shutdown" command on the interface while in config mode?
**********
As I can see, you've included the no shutdown command on both devices (router and switch) so your problem is only on protocols. Try this steps:
On your router, just issue the "no shutdown" command. Also Check if your subinterfaces are correctly configured.
Example configuration: Router
Router(config)#int fa0/1
Router(config-if)#no shutdown
Router(config-if)#exit
Router(config)#int fa0/1.X >>X is the VLAN ID configured on your switch
Router(config-subif)#encapsulation dot1Q X >>X is the VLAN ID configured on your switch
Router(config-subif)#ip address 192.168.X,X 255.255.X.X >>gateway for your VLAN
Router(config-subif)#exit
Router(config)#int fa0/1.XX >>another vlan
Router(config-subif)#encapsulation dot1Q XX >>another vlan
Router(config-subif)#ip address 192.168.X,X 255.255.X.X >>gateway for your other VLAN
Router(config-subif)#exit
Troubleshooting your switch:
*Check if the port connected to the router is configured as a trunk
*Check wether the configured vlan is in your vlan table
-------------------------------
In order to get a "VLAN interface" you just need 2 things:
1) enter the interface config mode and hit "no shut"
2) ensure there is an active port in that VLAN on your device
To see all answers submitted to the Answer Wiki: View Answer History.
and also see there is one physical port is active in that vlan.