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9130 odd behavior forwarding DHCP packets

Vasco Costa
Level 1
Level 1

Hi,

We've installed some 9115/9120/9130 at a customer beginning last week. They are still managed by a pair of 5520 with 8.10.142.This Friday they reported issues with DHCP. Some clients couldn't get DHCP addresses

After some troubleshooting, we narrowed the problem to a 9130 AP. We also noticed that there weren't any DHCP Offers passing from the AP to the clients. 

The AP was working with dual 5Ghz radio and one 2,4Ghz. Instead of rebooting the AP, we first disabled both 5Ghz radio interfaces and watch how the clients worked in 2,4Ghz. Now we saw the DHCP working fine and we could see DHCP Offers getting forwarded to the clients.
Tried to enable just one of the 5Ghz radios; again, everything working fine.
Tried to enable the other 5Ghz radio while shutting the previous one; and again everything worked fine
Tried enabling both 5Ghz radios; All good now

Anyone with a similar issue with 9130?
The only workaround we did was to disable/enable the dot1 interfaces of the 9130.

Cheers,
Vasco
5 Replies 5

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