AP Vlan & DHCP configuration

Answered Question
Aug 6th, 2007

Hi all,

I try to set up multiple Vlan but my issue is to associate them ip subneting.

This is the example:

I want to make some Vlans:

- 1 for Data

- 1 for Voice

so I make the ssid

dot11 ssid data

vlan 100

authentication ...

!

dot11 ssid voice

vlan 200

authentication open

authentication key-management wpa

wpa-psk ascii ...

!

interface Dot11Radio0.100

encapsulation dot1Q 100 native

no ip route-cache

bridge-group 1

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding

bridge-group 1 spanning-disabled

interface Dot11Radio0.200

encapsulation dot1Q 200

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 FastEthernet0.100

encapsulation dot1Q 100 native

no ip route-cache

bridge-group 1

no bridge-group 1 source-learning

bridge-group 1 spanning-disabled

!

interface FastEthernet0.200

encapsulation dot1Q 200

no ip route-cache

bridge-group 1

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding

bridge-group 1 spanning-disabled

and the BVI

interface BVI1

description Basic Virtual Interface

ip address A.B.C.D /24

no ip route-cache

the BVI interface is in the native Vlan of Data. My issue is that I want to have on subnet 192.168.1.0/24 for Data and another 192.168.2.0/24 for the voice

but the problem is that I always get dhcp info from the subnet where the BVI is.

Can anybody help me on that ?

I assume that the DHCP request is ?ade by the IP of the BVI (when helper activated) so this is why I always get an IP from the data pool where the BIV is into.

I started to think to some solution like create a BVI2 but this is a lost of IP

or directly assign ip from sub ethernet int and activate the helper.

What is the best and what do you think of that ?

Thanks in advance

Matt

I have this problem too.
0 votes
Correct Answer by mscherting about 9 years 3 months ago

Define a third "native" vlan for the BVI. Don't map it to a radio interface or SSID.

Do follow Bill's suggestion to use the web interface. You'll see the correct bridge groups built for you.

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Overall Rating: 5 (1 ratings)
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hadbou Fri, 08/10/2007 - 06:54

Assign a interface name BVI100 and assign an ip address in the range of 192.168.1.0 and assign a ip helper-address .

bcolvin Sun, 08/12/2007 - 18:32

Your problem is all your interfaces are using bridge group 1. change the bridge group number to match the corresponding VLAN and things should improve as long as the switch port is configured for trunking/.1Q support.

Suggestion initially configure the VLAN's using the WEB interface and then check the config and see the result.

Bill

Correct Answer
mscherting Fri, 08/17/2007 - 13:10

Define a third "native" vlan for the BVI. Don't map it to a radio interface or SSID.

Do follow Bill's suggestion to use the web interface. You'll see the correct bridge groups built for you.

subrin_matt Fri, 08/24/2007 - 04:49

Hi all,

first thanks very much for all your answer, I'm pretty busy and I keep that for some of my dead time.

I will test all of that and let you know the result

thanks again

subrin_matt Thu, 12/20/2007 - 05:11

So I worked to find what was going wrong with Bridge an routing. And I find the issue, now all work fine I can have a subnet over each ssid

Thanks again

Matt

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