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08-06-2013 01:50 AM
08-06-2013 01:50 AM
I've got two 1910 switches, A and B, connected via a 2-port fiber trunk.
Everything works fine except that the trunk seems to be eating DHCP packets.
On A's side, there is a DHCP server and all the workstations get their addresses correctly.
On B's side, none of the workstation get any reply from the DHCP server.
If I manually configure an IP address (or set up a rogue DHCP server) on one of the "B" workstations, I can ping the DHCP server and any of the "A" workstations just fine -- which I guess means that ARP broadcasts go through correctly.
The trunk/aggregate link is a tagged member of VLAN 1 on both switches, and all the workstation ports are VLAN 1 untagged access ports.
I've disabled IGMP and DHCP snooping, and broadcast suppression is at ratio 100%. No DHCP relay is configured on either switch as everything is supposed to be in the same IP segment.
Solved! Go to Solution.
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08-06-2013 11:36 AM
08-06-2013 11:36 AM
SolutionOk... this seems to have mysteriously fixed itself.
No idea what did it, but now DHCP is working also, and both ends of the aggregated link (49-52) are still "VLAN 1-3 tagged PVID 1234 (dummy) link type trunk" while the workstation ports are "VLAN/PVID 1 untagged access" -- as they are supposed to be.