Layer 3 Roaming Question/Issues

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  • Updated 2 years ago
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Hey, I was wondering if I could get some assistance/knowledge in regards to layer 3 roaming. We have a large building with 10 floors and each floor is separated with its on VLAN. We've configured the use of Tag3 to assign the correct VLAN based on the floor which the client is on.

The behavior that I see is the client successfully auths to an AP on the 10th floor. The client then puts the laptop to sleep,  jumps in the elevator and moves down to the 8th floor. The laptop then wakes from sleep on the 8th floor, still has its same IP address from the VLAN on the 10th floor, the VLAN for the 8th floor is assigned but the client is showing as limited connectivity.

Now my understanding (correct me if i'm wrong!) is that a tunnel should be formed from the AP on the 10th floor to the AP on the 8th floor to allow the client to seamlessly roam. We have tunnel configuration in place on the HiveManager.

Based on my research this information should be handled by ACSP over the air if the AP's can hear each other. However upon reading the Aerohive documentation it advises that the AP's will still communicate via ACSP but I assume over the wire if they can't hear each other.

My question is, how does it do this? I have been thinking that we need to manually add the ACSP neighbors in, however not all AP's are available in my list which makes me think that the AP's can't speak to each other via the wired network to transfer this ACSP stuff? I can't also see the neighbours in the acsp output.

I'm also thinking of what the client needs when its roaming to the 8th floor, maybe DHCP helper, the 10th floor vlan tagged on this port?

Thanks all
Craig
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zalion0

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Posted 2 years ago

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Joel Brooks

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I think you just answered the question. It sounds like you need to tag all the AP switchports with all the appropriate VLANs. Are all of your APs in the same management VLAN by chance? That could also be a factor.
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zalion0

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Ah have I! I don't believe the AP's are in the management VLAN, thinks is something I'll need to check! Cheers