topic Re: problem with IP helpers after migration in General Topics

problem with IP helpers after migration

dieter_b — Sat, 29 Apr 2017 16:11:40 GMT

We're migrating from a PA-2020 to PA-3020.

PANOS 6.1.12

Config migration went fine. And most functionality is ok on the new device.

However our IP helpers don't work anymore. We use them on tagged subinterfaces.

All subinterfaces on one interface connected to switch.

Capture shows the device receives the DHCP discoveries. But it does nothing with them: no drop, no forwarding.

Any ideas what may be causing this ?

paoloflores — Mon, 01 May 2017 05:14:02 GMT

Can you give a screenshot of your DHCP relay configuration?

dieter_b — Tue, 02 May 2017 06:25:05 GMT

nothing fancy... and that worked (and still does) on the old device

dieter_b — Tue, 02 May 2017 09:56:15 GMT

Seems to be resolved in test environment. Probable cause was management-client Device was stuck in init state.

Overall status was in init.

Commit force probably solved that.

dieter_b — Thu, 04 May 2017 11:55:48 GMT

We went live again and problem came back.

After 3 hours of troubleshooting (clearing arp/mac caches, rebooting servers...), replacing a network patchcord resolved the issue !!

With the faulty cable we had physical link, but no connection... pff

BPry — Thu, 04 May 2017 19:32:43 GMT

@dieter_b Dang faulty cables 😉 glad you figured out the issue.