05-05-2009 12:57 AM - edited 07-03-2021 05:32 PM
I have a point-to-multipoint wireless bridge setup using Cisco 1400 series bridges (Cisco 1410)
I'm trying to transport VLANs across the bridges and I have (I think) configured them as per the documentation.
At either end of the 1410s the Cisco switch ports are set up as trunk ports.
Below is the config from one of the non-root bridges
!
hostname BR02
!
!
dot11 vlan-name land-corporate vlan 520
dot11 vlan-name corp-WiFi vlan 521
dot11 vlan-name dcs vlan 503
dot11 vlan-name guest-WiFi vlan 522
!
dot11 ssid *snip*
vlan 500
authentication open
infrastructure-ssid
!
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
encryption vlan 500 key 1 size 128bit 7 <snip> transmit-key
encryption vlan 500 mode wep mandatory
!
ssid *snip*
!
station-role non-root bridge
rts threshold 4000
concatenation
infrastructure-client
!
interface Dot11Radio0.500
encapsulation dot1Q 500 native
no ip route-cache
bridge-group 1
bridge-group 1 spanning-disabled
!
interface Dot11Radio0.503
encapsulation dot1Q 503
no ip route-cache
bridge-group 252
bridge-group 252 spanning-disabled
!
interface Dot11Radio0.520
encapsulation dot1Q 520
no ip route-cache
bridge-group 255
bridge-group 255 spanning-disabled
!
interface Dot11Radio0.521
encapsulation dot1Q 521
no ip route-cache
bridge-group 254
bridge-group 254 spanning-disabled
!
interface Dot11Radio0.522
encapsulation dot1Q 522
no ip route-cache
bridge-group 253
bridge-group 253 spanning-disabled
!
interface FastEthernet0
no ip address
no ip route-cache
!
interface FastEthernet0.500
encapsulation dot1Q 500 native
no ip route-cache
bridge-group 1
bridge-group 1 spanning-disabled
!
interface FastEthernet0.503
encapsulation dot1Q 503
no ip route-cache
bridge-group 252
bridge-group 252 spanning-disabled
!
interface FastEthernet0.520
encapsulation dot1Q 520
no ip route-cache
bridge-group 255
bridge-group 255 spanning-disabled
!
interface FastEthernet0.521
encapsulation dot1Q 521
no ip route-cache
bridge-group 254
bridge-group 254 spanning-disabled
!
interface FastEthernet0.522
encapsulation dot1Q 522
no ip route-cache
bridge-group 253
bridge-group 253 spanning-disabled
!
interface BVI1
ip address 10.10.150.16 255.255.255.0
no ip route-cache
!
ip default-gateway 10.10.150.1
!
bridge 1 route ip
!
When the switch ports are in trunk mode, the system falls over and the switch ports seem to shut down (very remote site so can't confirm at this stage)
When the switch ports are setup as an access port on the native VLAN (500) the bridges work but only for the native VLAN.
Any suggestions?
05-05-2009 07:38 AM
Can you post the switchport trunking config you're using? Make sure you're setting "switchport trunk encap dot1q" and "switchport trunk native vlan 500".
Also note that VTP traffic will not cross the wireless link unless you use vlan 1 as the native vlan.
05-05-2009 03:48 PM
Here is an example of the switch config I was testing:
If I use a config like Gi1/0/11 the bridge works for VLAN 500 only
If I use a config like Gi1/0/12 the bridges fail
interface GigabitEthernet1/0/11
description SWITCHPORT
power inline never
switchport access vlan 500
speed 100
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/12
description TRUNKPORT
power inline never
switchport trunk encapsulation dot1q
switchport trunk native vlan 500
switchport mode trunk
spanning-tree portfast
Thanks
Ian
05-05-2009 07:56 PM
Try configuring "switchport trunk allowed vlan 500,503,520,521,522" on switch ports
05-05-2009 09:03 PM
Thanks for that, I'll try it when I can get my hands on the test setup again.
Does this mean that the Cisco 1400 documentation that states you should setup a trunk port is slightly misleading?
05-05-2009 09:13 PM
"switchport trunk allowed" goes together with "switchport mode trunk"
05-05-2009 11:54 PM
Ok, I misinterpreted that got appllied to an access port.
So my config would look something like:
interface GigabitEthernet1/0/12
description TRUNKPORT
power inline never
switchport trunk encapsulation dot1q
switchport trunk native vlan 500
switchport mode trunk
spanning-tree portfast
switchport trunk allowed vlan 500,503,520,521,522
I thought that all VLANs were passed by default unless specific ones were allowed. I'll give it a go though....
05-06-2009 11:04 AM
The reason I suggested that is because I ran into the same issue just last week, and I vaguely remember fixing it with that command. I could be wrong, but if it doesn't work for you, I'll try to remember what else I did.
Are you basically seeing the switch taking the port into error disabled mode or SPT blocking? Do you have any vlans other than 500,503,520,521,522 configured on either switch?
05-06-2009 05:37 PM
Not sure what happens to the switch as it's in middle of outback Australia (don't ask!!) and I didn't have time to diagnose it properly when onsite. The end switch has been temporarily deployed elsewhere so I can't get on to test it for the moment.
However the whole bridge network did go offline when I tried to setup the trunks, so there is a good chance there was some blocking going on.
Originally I thought I'd crashed the 1410 but then realised it hadn't rebooted and that the switch port had gone "off line".
I'll post an update when I get the switch back and can test.....
Thanks again.
Ian
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