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Community Member

Flexconnect Local switching + WGB with Passive Clients

 

Dear All Support

Lately I have been dealing with infrastructure that use WLC 7.6.xxx 5508 and Unified AP 1131G on Flexconnect Local switching mode on branches . To those AP's, WGB AP 1121G are connected, and to those Passive Client (printers) are connected. 

Wired_Passive_Client<->WGB1121<->RADIO<->Flex_LWAP1131<->L2switch(unmanage)<->L3Router<->IPSEC<->L3RouterISR<->L3_6500_core<->WLC5508

 

So following recommendation for passive clients, on WGB1121 following sets were put

Forwarding ARP, increasing aging-time, dot11 activity timers

On L3Router Passive Client Mac address were add as static arp entry

on WLC side Passive Client options on WLAN was not set as from documentation here and there, FlexConnect Local does not support Multicast<->Multicast traffic

Issues is that we were losing connections to Wired Passive Clients (quick fix was/is to restart WGB or remove arp entry from L3Router and add it again) at the same time we did not loss WGB AP, but interesting point is that WGB1121 is still seeing Passive Client, as connected and communication between them is working, even if we cannot ping it from L3Router not to mention Central Office devices.

So by those symptoms I imagine that there is problem on passing ARP to WLC and to L3 devices, so we did create mac filtering on WLC and assign it to WLAN after couple of days Wired_Passive_Cleint do not disappeared and are still visible. 

To be fair this is a lot of entries to pass on to WLC and L3 routers not to mention that on this same WLAN we are connecting Tablets. So Mac address to filter of Printers and Tablets need to be put on this WLAN when using MAC filtering. I could not find any way to Provide Mac Filtering on WLAN and still be able to connect devices that were not put on Filtering List. (apart from creating another WLAN)

The other documentation for passive client mention that Multicasting is required, ok as I have wrote above this wont work to FlexConnect Local switching but I found this entry on documentation:

"For FlexConnect APs with locally switched WLANs, passive client feature enables the broadcast of ARP requests and the APs respond on behalf of the client."

 

Will this work with AP Multicas: Unicast Mode and than tweak Passive Client on WLAN for ARPs to be broadcasted ? Does this mean that I have to Enable Multicast Globally? Those enabling AP Multicasting -> Unicast on WLC will required enabling Multicasting on L3Router on branch side and respectively L3RouterISR and L3_6500_core on Central Office? Or is it enough to enable Broadcast Forwarding.

 

Also maybe we could avoid macfiltering  on WLAN if we add static mac address of wired_passive_clients on L3_6500_core device?

I still did not end up with ideas to try but some help will be appreciated.

 

 

 

 

 

 

 

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