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DHCP gremlins on 3850

bkoch1
Level 1
Level 1

Upgraded from a 3560G poe switch as my L3 switch (routing w/EIGRP) to a 3850. DHCP has stopped working on the LANs.

Validated dhcp helper configs are still there. EIGRP config looks good.

If I set a static IP on a PC on the LAN, it routes everywhere just fine.

Some phones that were rebooted got an IP and registered to CUCM just fine; others just sat there spinning, trying to get an IP (vlan 143).

None of the PCs would get a DHCP IP (vlan 43).

I added in another 3560G, added the VLAN L3s and EIGRP routing to it, trunked it to the 3850, and then turned off the VLAN L3s and EIGRP routing on the 3850. Immediately, all phones got an IP, registered, and PCs could grab a DHCP IP again. I'm confused as heck!!

3850 config attached

3 Replies 3

balaji.bandi
Hall of Fame
Hall of Fame