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Guest · Posted: Thu Dec 15, 2005 2:40 am Post subject: Trunking: Aironet 1200 - Cat2950

I have been having issues configuring trunking between my 1200AP and
2950 switch.
After modifying the AP config with subif/dot1q/vlans i am able to
maintain access to it (native vlan1 operational, Vlan3,4 are not). But
as soon as I put the switchport in trunking mode (dot1q only on 2950) i
lose all connectivity to the AP.

SSID AP mapped to VLAN 3
SSID PDA mapped to VLAN 4
native vlan 1

AP CONFIG:
------------------------------------------------------------------------------------------------------------------------------

VC2FL_AP1>en
Password:
VC2FL_AP1#show run
Building configuration...

Current configuration : 2563 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
!
hostname VC2FL_AP1
!
enable secret 5
!
username Cisco password
ip subnet-zero
!
!
bridge irb
!
!
interface Dot11Radio0
no ip address
no ip route-cache
!
ssid ap
vlan 3
authentication open
guest-mode
!
ssid pda
vlan 4
authentication open
!
speed 1.0 basic-2.0 5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0
54.0
rts threshold 2312
power local cck 30
channel 2462
station-role root
!
interface Dot11Radio0.1
encapsulation dot1Q 1 native
no ip route-cache
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
!
interface Dot11Radio0.3
encapsulation dot1Q 3
no ip route-cache
bridge-group 3
bridge-group 3 subscriber-loop-control
bridge-group 3 block-unknown-source
no bridge-group 3 source-learning
no bridge-group 3 unicast-flooding
bridge-group 3 spanning-disabled
!
interface Dot11Radio0.4
encapsulation dot1Q 4
no ip route-cache
bridge-group 4
bridge-group 4 subscriber-loop-control
bridge-group 4 block-unknown-source
no bridge-group 4 source-learning
no bridge-group 4 unicast-flooding
bridge-group 4 spanning-disabled
!
interface FastEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
!
interface FastEthernet0.1
encapsulation dot1Q 1 native
no ip route-cache
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
!
interface FastEthernet0.3
encapsulation dot1Q 3
no ip route-cache
bridge-group 3
no bridge-group 3 source-learning
bridge-group 3 spanning-disabled
!
interface FastEthernet0.4
encapsulation dot1Q 4
no ip route-cache
bridge-group 4
no bridge-group 4 source-learning
bridge-group 4 spanning-disabled
!
interface BVI1
ip address 128.3.75.4 255.255.255.0
no ip route-cache
!
ip default-gateway 128.3.75.1
ip http server
ip http help-path
http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag/ivory/1100
ip http access-class 10
ip radius source-interface BVI1
access-list 10 permit 128.1.2.180
access-list 10 permit 128.1.1.221
access-list 10 permit 128.1.2.22
access-list 10 permit 128.1.1.53
access-list 10 permit 128.1.1.90
access-list 10 permit 128.1.1.99
bridge 1 route ip
!
!
line con 0
line vty 0 4
access-class 10 in
password
login
line vty 5 15
login
!
end
---------------------------------------------------------------------------------------------------------------------------
Switch CONFIG:
------------------------
!
interface FastEthernet0/24
description VC2FL_AP1
switchport trunk allowed vlan 1,3,4
switchport mode trunk
switchport nonegotiate
!

Fa0/24 VC2FL_AP1 connected trunk a-full a-100
10/100BaseTX

ClosetF#show vtp status
VTP Version : 2
Configuration Revision : 0
Maximum VLANs supported locally : 250
Number of existing VLANs : 8
VTP Operating Mode : Transparent
VTP Domain Name : MedicalPark
VTP Pruning Mode : Disabled
VTP V2 Mode : Enabled
VTP Traps Generation : Disabled
MD5 digest : 0x62 0x2B 0xE8 0xD6 0x06 0xE1 0x58
0x44
Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00
ClosetF#
----------------------------------------------------------------------------------------------------------
I would appreciate any suggestions or comments you may have about my
problem!

Thanks,
Todd

Merv · Guest

What is the encapsulation used on the CAT 2950 ?
try "switchport trunk encapsulation dot1q"

Guest

The "encapsulation dot1q" part of the "switchport trunk" command is not
supported on the 2950 platform, since dot1q is the only encapsulation
supported.

Martin Turba · Guest

toddedu@yahoo.com schrieb:

BG · Guest

AP config looks fine. this is my switch config on a 3560

interface FastEthernet0/21
switchport trunk encapsulation dot1q
switchport trunk native vlan 200
switchport trunk allowed vlan 200,341-346
switchport mode trunk

Guest

Martin I tried changing bridge-group 1 to the Dot11Radio0 and
completely removing Dot11Radio0.1, there was no change in the AP
responces. It may have something to do with Virtual-Dot11Radio
interfaces. Looking at the output of "show vlan" on my AP and one i
found online i can see a difference, but i can find no info on how to
set up those virtual interfaces:
show vlan from my AP:
--------------------------------------------------------------------------------------------------------
Virtual LAN ID: 1 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: Dot11Radio0.1
FastEthernet0.1

This is configured as native Vlan for the following interface(s) :
Dot11Radio0
FastEthernet0

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 1 7260
3409
Other 0
150

0 packets, 0 bytes input
1744 packets, 117461 bytes output
Bridging Bridge Group 1 7260
3409
Other 0
150

3401 packets, 283323 bytes input
23 packets, 8280 bytes output

Virtual LAN ID: 3 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: Dot11Radio0.3
FastEthernet0.3

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 3 783
869
Other 0
9

225 packets, 34462 bytes input
677 packets, 72060 bytes output
Bridging Bridge Group 3 783
869
Other 0
9

558 packets, 45870 bytes input
205 packets, 33352 bytes output

Virtual LAN ID: 4 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: Dot11Radio0.4
FastEthernet0.4

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 4 378
378
Other 0
7

0 packets, 0 bytes input
385 packets, 27237 bytes output
Bridging Bridge Group 4 378
378
Other 0
7

378 packets, 25704 bytes input
0 packets, 0 bytes output
-----------------------------------------------------------------------------------------------------------------------------
show vlan on cisco's web site:
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Virtual LAN ID: 1 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: FastEthernet0.1
Dot11Radio0.1
Virtual-Dot11Radio0.1

This is configured as native Vlan for the following interface(s) :
FastEthernet0
Dot11Radio0
Virtual-Dot11Radio0

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 1 36954
0
Bridging Bridge Group 1 36954
0

Virtual LAN ID: 10 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: FastEthernet0.10
Dot11Radio0.10
Virtual-Dot11Radio0.10

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 10 5297
0
Bridging Bridge Group 10 5297
0
Bridging Bridge Group 10 5297
0

Virtual LAN ID: 30 (IEEE 802.1Q Encapsulation)

vLAN Trunk Interfaces: FastEthernet0.30
Dot11Radio0.30
Virtual-Dot11Radio0.30

Protocols Configured: Address: Received:
Transmitted:
Bridging Bridge Group 30 5290
0
Bridging Bridge Group 30 5290
0
Bridging Bridge Group 30 5290
0

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