DComTalk.com

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/sm ... 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

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

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

toddedu@yahoo.com schrieb:

I have been having issues configuring trunking between my 1200AP and
2950 switch.

The only thing I noticed that is different from our configuration is
that your bridge-group 1 consists of interface Dot11Radio0.1 and
FastEthernet0.1, whereas in our configuration, Dot11Radio0 is member of
bridge-group 1, but I'm not quite sure if that could be related to your
problem.

Martin

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

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

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