Wireless Access

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Occasional Contributor I

Management vlan breaks LAN to WLAN multicast

original setup

 

vlan 1 wired hosts and WAP devices

vlan student - student wireless

vlan staff - staff wireless

at this point everyone can multicast everywhere

 

new setup

vlan 1 wired hosts 

vlan management - WAP devices

vlan student - student wireless

vlan staff - staff wireless

 

WLAN to WLAN multicasting works

LAN to WLAN multicasting is broken.

 

We use instant controllers.

The only thing that has changed is the IP and VLAN for the physical WAP

all other devices are still on the proper VLAN.  

ip igmp is enabled on all VLANs

 

all VLANs can ping all other VLANs

 

 

What am I missing?

Re: Management vlan breaks LAN to WLAN multicast

Hi Stephen,

 

Is vlan 1 (wired hosts) trunked to the IAP ?

 

What kind of multicast traffic/application is being used ?

Occasional Contributor I

Re: Management vlan breaks LAN to WLAN multicast

No VLAN 1 is not trunked to the WAPs.  This is Chromecast data.  The wired devices can no longer see the Chromecasts.  I would expect the data to be routed off of VLAN 1 at the router.

Aruba Employee

Re: Management vlan breaks LAN to WLAN multicast

Is Chromecast discovery the only "multicast" that's not working from LAN to WLAN? Typically, the mDNS discovery is not routable and needs some kind of proxy to work across routed VLANs. Since the Instant cluster does have visibility to VLAN1, it can't provide that proxy for WLAN users. If you connect a wired client to your WLAN VLAN, is it able to see the Chromecast devices on VLAN1?


Charlie Clemmer
Aruba Customer Engineering
Occasional Contributor I

Re: Management vlan breaks LAN to WLAN multicast

I moving a computer with Wireshark from VLAN to VLAN and doing packet capture.  I looks like that WAP is treating the multicast traffic as untagged.  Both SSIDs have thier own VLAN, and other traffic is being tagged correctly.  I will know more after I disect the captures.  

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