Flex Connect Smart Phone Issues

[Roger Alderman]

Hi All

I have a 5508 controller with 7.4.100.0 code supporting Cisco 1142N and Cisco 3602I and Cisco 3602E APs.

I have flex connect set up with a guest WLAN configured with web auth.

I am using local switching and central web auth.

A laptop connects fine to the guest SSID.

An iPhone and Android phones fail to get an IP address.

An Android tablet shows the same issue.

Anyone seen this before?

Regards

Roger

[Scott Fella]

A few things here. The version you are on isn't a good code. I suggest looking at v7.4.121.0. Since this is WebAuth and other devices are fine... Does the devices see a splash page or doesn't get that far because of not getting an IP? Can you post your show WLAN

What state is the client in also?

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[Roger Alderman]

Hi Scott

The WLAN is configured as Open with Web Auth. FT is disabled.

The client doesn't get an IP address so no splash page as yet.

The client is an Web-Auth Reqd state.

Regards

Roger

[Scott Fella]

I have many customer where I'm also doing FlexConnect and using the WLC for WebAuth and I have not seen an issue like that at all.  Either all the devices have issue or none... Is the issue with all iPhones and iPads or a few?  Can you post the show wlan

You are not anchoring or are you?

Thanks,

Scott

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[Roger Alderman]

Hi Scott

Here's the relevant info:

Show WLAN 2

WLAN ident = 2

Profile Name = xxxx

SSID = xxxx

Status = Enabled

MAC FIltering = Disabled

Broadcast SSID = Enabled

AAA Policy Override =Disabled

NAC = All options disabled

Max clients per AP radio = 200

Number of active clients = 12

Exclusion timeout = 60 secs

Session timeout = 1800 secs

User Idle timeout = 300

User Idle Threshold = 0

NAS Ident = Hostname of WLC

CHD per WLAN = enabled

Webauth DHCP exclusion = disabled

Interface = management

Multicast interface = not configured

WLAN IPv4 ACL = none

WLAN IPv6 ACL = none

mDNS status = enabled

mDNS profile = none

DHCP server = default

DHCP address assignment required = disabled

Static IP client tunneling = disabled

PMIPv6 mobility type = none

QoS = silver

WMM = allowed

WMM UAPSD = disabled

Media stream multicast = disabled

CCX Aeronet IE =enabled

CCX GPR = disabled

CCX Diagnostics = disabled

Dot11 phone mode = disabled

Wired Protocol = none

Passive client feature -= disabled

Perr to Peer blocking = disabled

Radio Policy = all

DTIM = 1

Radius Servers = none

8021.11 auth = open

FT support = disabled

Web Based Auth = enabled

No Web Based ACLs

Web Auth Server Precedence = Local

Web Passthrough = disabled

Conditional web redirect = disabled

Splash page web redirect = disbaled

Auto Anchor = disabled

Flex Connect Local Switching = enabled

Flex Connect Central DHCP Flag = disabled

Flex NAT-PAT flag = disabled

Flex DNS override = disabled

Flex VLAN based VLAN switching = disabled

Flex local auth = disabled

Flex learn IP address = enabled

Regards

Roger

[Scott Fella]

Roger,

The WLAN looks fine... nothing has changed on the WLAN and this has been working for a while?

Thanks,

Scott

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[Rasika Nayanajith]

Hi Roger,

As Scott sugested upgrade to 7.4.121.0 & start troubleshooting.

Knowing the code you are running is buggy, not point spending lots of hours to troubleshoot with a code like that. Also upgrade your FUS to 1.9.0.0

HTH

Rasika

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[Roger Alderman]

The issue was an extremely strange problem with a DHCP Server.

It was resolved by temporarily moving the DHCP scopes onto the firewalls.

The DHCP Server just happened to have issued IP addresses to the test laptops but then stopped working.

The server is currently being rebuilt.

Regards

Roger

[Scott Fella]

So since the issue was with smartphones only, was it due to the lease for those addresses?

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