Same SSID at two different locations and different DHCP relay

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  • Updated 3 years ago
I am trying to create the same SSID with multiple VLANs and different DHCP relay. Trying to setup same SSID at two different sites with different firewalls. I would like to have the SSID go to the corresponding DHCP server based on their location. is this possible to do?
Photo of FluxCapMalfunction


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Posted 6 years ago

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Photo of Jeff Roback

Jeff Roback

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Yes this works quite nicely with an organization with multiple sites. The dhcp server location isn't determined by the SSID, it's determined by the device that's doing DHCP relay for you, which can be the switch or firewall at each site. The DHCP server is smart enough to see which subnet the request came from and respond accordingly.

One thing to be aware of... if the locations are close to each other, make sure the DHCP lease time is less than the time it takes to get between locations. Windows 7 has this 'helpful' feature where if it sees the same SSID it tries to keep using the same address without going through a full DHCP cycle. That one puzzled us for a very long time....