Local DHCP | Multiple SSID | Autonomous | 1142 | 15.2(4)JA1

[Aashutosh Mahajan]

Hi,

My requirement to use AP 1142 as an autonomous AP with 3 ssid/ 3 vlans,

Unfortunately its not working,

SSID 1 - ABC - 10.10.10.0/24

SSID 2 - DEF - 10.10.20.0/24

SSID 3 - GHI - 10.10.30.0/24

DHCP pools are configured locally,

Clients can connect and i have verified 'connected' status but they get stuck on 'obtaining ip address' state/ not getting any ip address from dhcp,

Attached is the configuration,

Please help,

Thanks,

Aashutosh

[Rasika Nayanajith]

Hi,

If vlan 111 is native (which is configured under G0/.111) then Radio 0.111 & 1.111 interfaces should be in bridge-group 1. (not the physical radio 0 & radio 1)

interface Dot11Radio0.111
 encapsulation dot1Q 111 native
 bridge-group 1
!
interface Dot11Radio1.111
 encapsulation dot1Q 111 native
 bridge-group 1
!

Pls post switchport configuration where this  AP connected to makesure that is configured correctly.

HTH

Rasika

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[Aashutosh Mahajan]

Thanks a lot Rasika, for getting back.

I will make the changes and let you know asap,

Right now the switchport connected to this AP is not configured for these vlans (these are just dummy vlans i am testing with)

All I am concerned about is that client should connect to SSID - ABC and get an ip address from range 10.10.10.0/24 similarly clients connecting to SSID - DEF should get an ip address from range 10.10.20.0/24 and so on..(don't  really care about internet or any other connectivity for these wireless clients)

So I should be good with testing without switch port configuration right ? 

Also

Is there must be a native vlan on one of SSID ? what is role of native vlan in such configurations with multiple SSIDs?

Please forgive me if it all sounds stupid !!

Regards,

Aashutosh

[Rasika Nayanajith]

Hi

So I should be good with testing without switch port configuration right ? 

Yes, if you want to simply test wireless client connectivity without they able to go anywhere this should be fine.

No, native vlan required on a SSID. It should be the subnet/vlan assign to BVI interface & to be used brige-group 1. So in your case if you assign vlan 111 for a SSID & not for the AP management then you do not want to configure vlan 111 as native. (simply configure the vlan assign to BVI as native)

Refer this post as I have given some example config for 3 SSID with 3 different vlans.

https://supportforums.cisco.com/discussion/12353756/best-practice-configuring-2602i-aironet-50-70-users

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HTH

Rasika

[Aashutosh Mahajan]

Thanks,

The post you have mentioned will definitely come in handy.

I will keep you updated :)

[Aashutosh Mahajan]

Hi Rasika,

No luck,

Still clients are not getting an ip address from scopes on AP,

Please check the config attached,

Thanks,

Aashutosh

[Rasika Nayanajith]

When you are testing does your AP Ethernet link was up ? If not try to bring that link up.

Since AP operate as L2 device, I think you have to configure those SVI (111,222,333 & 50) on your switch & trunk them to AP for the fully functionality.

Try that & see if any differences.

HTH

Rasika

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[Aashutosh Mahajan]

Interface                  IP-Address      OK? Method Status                Protocol
BVI1                       172.16.50.253   YES TFTP   up                    up
Dot11Radio0                unassigned      YES unset  up                    up
Dot11Radio0.50             unassigned      YES unset  up                    up
Dot11Radio0.111            unassigned      YES unset  up                    up
Dot11Radio0.222            unassigned      YES unset  up                    up
Dot11Radio0.333            unassigned      YES unset  up                    up
Dot11Radio1                unassigned      YES unset  up                    up
Dot11Radio1.50             unassigned      YES unset  up                    up
Dot11Radio1.111            unassigned      YES unset  up                    up
Dot11Radio1.222            unassigned      YES unset  up                    up
Dot11Radio1.333            unassigned      YES unset  up                    up
GigabitEthernet0           unassigned      YES unset  up                    up
GigabitEthernet0.50        unassigned      YES unset  up                    up
GigabitEthernet0.111       10.10.10.1      YES manual up                    up
GigabitEthernet0.222       10.10.20.1      YES manual up                    up
GigabitEthernet0.333       10.10.30.1      YES manual up                    up

If I have a dhcp server local on AP then still do you think the switchport/BVI configuration matters?

I have a doubt regarding how will a client in SSID xyz will know what pool to choose an IP address from - and how we can link SSID and DHCP pools 

Please let me know your thoughts !

Thanks,

Aashutosh

[Rasika Nayanajith]

If I have a dhcp server local on AP then still do you think the switchport/BVI configuration matters?

Give it a try with proper BVI, default gateway  & switchport configuration. If no difference we will have a look then.

I have a doubt regarding how will a client in SSID xyz will know what pool to choose an IP address from - and how we can link SSID and DHCP pools 

Each dot11 SSID configured with a vlan. Same vlan number is configured for radio & ethernet sub interface to bridge traffic so the connected switch identify under which sub-interface (which is the vlan) traffic comes. Since it is broadcast traffic your AP DHCP server responds with the IP from a proper pool.

HTH

Rasika

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