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Beginner

VLAN bridge with Catalyst 3750

Hi, all!

I have 3 VLANs here that need to be on the same network segment.  They are going to be used by our Wi-Fi network (with Aironet APs), bound to 3 different SSIDs (as Aironet APs doesnt allow multiple SSID per VLAN), each one with a different authentication method and server.

Is there a way to bridge those VLANs together with a Catalyst 3750 switch?  I tryed configuring an IP address on one of the VLAN interfaces, then configuring a bridge with the vlan-bridge protocol (Catalyst 3750 doesnt have the "ieee" bridge protocol type) and put all 3 VLAN interfaces on the same bridge-group, but it didnt work (even with "bridge x route ip").

I also tryed configuring IRB bridging, with the 3 VLAN interfaces on the same bridge-group and an IP address on the BVI interface (the way I used to do with old 2600 routers).  Same result.

(actually, I didint test to see if the interfaces are actually being "bridged", but I see neither of them can reach the router)

Is there a way to do this?

Thanks in advice!

Rodolfo

1 REPLY 1
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Rising star

Hi,

You can create SVI interfaces for VLANs on 3750, create VLANs on AP connect them as trunk I have done it myself

VLAN 22 e.g. Wireless LAN, also you can create few wireless LAN.

3750:

int vlan 10

ip add 10.0.10.1 255.255.255.0

ip helper-address 10.0.10.10

no shut

int vlan 22

ip add 10.0.22.1 255.255.255.0

ip helper-address 10.0.10.10

no shut

int g1/0/1

switchport trunk encapsulation dot1q

switchport mode trunk

switchport trunk native vlan 10

AP:

dot11 vlan-name Native_vlan vlan 10

dot11 vlan-name eni.wip vlan 22

!

dot11 ssid test

   vlan 22

   authentication open

   authentication key-management wpa

   guest-mode

   wpa-psk ascii 7 040A59555B701E1D5D

!

!

!

username Cisco password 7 05280F1C2243

!

bridge irb

!

!

interface Dot11Radio0

no ip address

no ip route-cache

!

encryption vlan 22 mode ciphers tkip

!

ssid test

!

speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0 54.0

station-role root

!

interface Dot11Radio0.10

encapsulation dot1Q 10 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 Dot11Radio0.22

encapsulation dot1Q 22

no ip route-cache

bridge-group 22

bridge-group 22 subscriber-loop-control

bridge-group 22 block-unknown-source

no bridge-group 22 source-learning

no bridge-group 22 unicast-flooding

bridge-group 22 spanning-disabled

!

interface Dot11Radio1

no ip address

no ip route-cache

shutdown

!

encryption vlan 22 mode ciphers tkip

no dfs band block

speed basic-6.0 9.0 basic-12.0 18.0 basic-24.0 36.0 48.0 54.0

channel dfs

station-role root

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 Dot11Radio1.22

encapsulation dot1Q 22

ip dhcp relay information trusted

no ip route-cache

bridge-group 22

bridge-group 22 subscriber-loop-control

bridge-group 22 block-unknown-source

no bridge-group 22 source-learning

no bridge-group 22 unicast-flooding

bridge-group 22 spanning-disabled

!

interface FastEthernet0

no ip address

no ip route-cache

duplex auto

speed auto

!

interface FastEthernet0.10

encapsulation dot1Q 10 native

no ip route-cache

bridge-group 1

no bridge-group 1 source-learning

bridge-group 1 spanning-disabled

!

interface FastEthernet0.22

encapsulation dot1Q 22

no ip route-cache

bridge-group 22

no bridge-group 22 source-learning

bridge-group 22 spanning-disabled

!

interface BVI1

ip address dhcp client-id FastEthernet0

no ip route-cache

!

ip default-gateway 10.0.10.1

Please rate helpful posts.

Best regards,
Abzal
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