topic Clients cannot get IP from Flexconnect AP in Wireless

Clients cannot get IP from Flexconnect AP

SiJian Bao — Sun, 04 Jul 2021 07:15:25 GMT

Folks,

My wireless is deployed as flexconnect mode. I have 3 branches and each of them has their own VLAN, and the four SSIDs is the same. At my branch A, the vlan is 52. Vlan 52 is not reachable to my WLC but the AP at that branch can ping vlan 52 gateway. But the clients which connect the AP cannot gain their IP address from my DHCP server which is in VLAN 52, where did i do wrong? By the way, the dynamic interface I created in my WLC cannot ping the VLAN 52 gateway, either.

Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 11:33:11 GMT

Okay.... at your remote site you have vlan 52. Is vlan 52 for your AP's, for your clients, or used for both?

If you connect a laptop to a switch that is also in vlan 52, does that get an IP address?

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 11:37:40 GMT

vlan 52 is for both my APs and my clients, my APs use the static IP address from 192.168.52.4 to 192.168.42.9 and the rest is for the clients. And if I connect my laptop to a switch that is in vlan 52, I can get the IP address.

Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 11:39:41 GMT

If your laptop can get an IP address then the wireless clients should also. So can you post a screen shot of how you have the FlexConnect vlan mapping on the AP.

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Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 11:41:10 GMT

You are connecting your laptop to a switch out at the remote site correct?

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 11:43:11 GMT

I'm at home now and I cannot connect the WLC for now.

My FlexConnect vlan mapping is like:

SSID VLAN

ChinaPnR-User 52

ChinaPnR-Guest 53

Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 11:44:31 GMT

i connect my laptop just at the remote site. the vlan is used for the wired users for a while.

Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 11:46:04 GMT

The FlexConnect is connected to a trunk port allowing all the vlans you need? I need to see how your FlexConnect AP's are configured in order to help you here as it seems like there is a configuration issue.

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Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 11:47:15 GMT

Tell me what vlan is for the access point out at the remote site and all the SSID to VLAN's that you have or want to have.

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 12:05:09 GMT

yup, AP's are connected to a trunk port which allows vlan from 1 to 4095.

Take my AP-01 as a example:

IP:192.168.52.4

Netmask:255.255.255.128

Gateway:192.168.52.1

Trunk VLAN:52

Mode:Flexconnect Mode

VLAN Mapping of the AP:

SSID VLAN

ChinaPnR-User 52

ChinaPnR-Guest 53

ChinaPnR-Mobile 53

ChinaPnR-VIP 53

AP Groups:

Group name: KK7F

And I add the AP's of that floor

For the WLANs:

WLAN ID WLAN SSIDInterface/InterfaceGroup(G) SNMP NAC State

1 ChinaPnR-User KK7F-VLAN52 Disabled

2 ChinaPnR-Guest KK7F-VLAN53 Disabled

3 ChinaPnR-Mobile KK7F-VLAN53 Disabled

4 ChinaPnR-VIP KK7F-VLAN53 Disabled

For the Flexconnect Groups

I add all the APs of that floor and give them a ACL for the web authe. That's all.

And for the WLANs, I have already selected the "FlexConnect Local Switching" in the "Advanced"

For my dynamic interfaces, I just type in the information of vlan 52 and assign the physical port

Regards

Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 12:08:14 GMT

Okay here is the thing. Your AP is in vlan 52 and that is your native vlan. So your mapping for SSID ChinaPnR-User should be vlan 1.

Try that as that will work.

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 12:11:01 GMT

Thanks for your help. But how about other SSIDs, vlan 53 does not work, either.

Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 12:18:39 GMT

By the way, at the branch which has the WLC, my AP is also configured like that. My AP is in VLAN 8 and my mapping for my SSID ChinaPnR-User is vlan 8, it works fine.

Should the site which locates my WLC has the subnet of vlan 52, too?

Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 12:21:07 GMT

That is different because the AP is in local mode and you have defined a dynamic interface for vlan 52. SO local mode AP's are different than FlexConnect when using local switching.

Did that dfix your issue?

Thanks,

Scott

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Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 12:21:32 GMT

I though you mentioned only vlan 52 is the issue?

Thanks,

Scott

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 12:26:08 GMT

No, the AP's of the site which locates the WLC are also configured as FlexConnect Mode.

Sorry for my omission, vlan 53 does not work fine, either.

At my headquarter, vlan 8 is used for ChinaPnR-User and vlan 9 is used for the other three SSIDs. They both work fine.

At my branch, vlan 52 is used for ChinaPnR-User and vlan 53 is used for the other three, but neither of them work.

Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 12:31:53 GMT

Okay... well attach in a zip file the following:

show run-config from the WLC

show run interface of the FlexConnect AP connected to the switchport

show ip interface brief on the layer 3 from the remote site

Thanks,

Scott

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Re: Clients cannot get IP from Flexconnect AP

Scott Fella — Wed, 19 Jun 2013 12:34:00 GMT

What interface have you created for vlan 52 and 53 at the remote site? You have created a dhcp scope for that subnet?

If you connect a laptop to vlan 52 and vlan 53 on the same switch the AP's are connected to, you get an ip address?

Thanks,

Scott

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Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Wed, 19 Jun 2013 12:41:13 GMT

Firstly thanks for your help, I will post that information tomorrow.

The interfaces of 52 and 53 are just SVI's. I created a dhcp scope for the subnet: 192.168.52.1/25 for vlan 52 and 192.168.52.129/25 for vlan 53

Re: Clients cannot get IP from Flexconnect AP

SiJian Bao — Thu, 20 Jun 2013 08:50:58 GMT

Hi Scott,

This is the info you need yesterday, any help?