Trunking: Aironet 1200 - Cat2950

Dec 14, 2005 7 Replies
Trunking: Aironet 1200 - Cat2950 open original image

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:



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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
formatting link
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.

snipped-for-privacy@yahoo.com schrieb:

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

----------------------------------------------------------------------------------------------------------

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

What version of IOS are you running on the AP? I heard that this was a problem with the bleeding edge version of IOS.

-E

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