Hello,
I have a QFX3500 that is the router for all my l3 vlans (irbs on this device) and I'm trying to setup dhcp-relay to work with our PXE server. I have this exact config on a QFX5100 working without isssue. However on this device it just doesn't seem to work. The original setup was
3500 config
set forwarding-options storm-control-profiles default all set forwarding-options helpers traceoptions file dhcp_helper set forwarding-options helpers traceoptions level all set forwarding-options helpers traceoptions flag bootp set forwarding-options helpers traceoptions flag all set forwarding-options dhcp-relay server-group dhcpserver 185.221.134.35 set forwarding-options dhcp-relay group dhcprelay interface irb.217 set forwarding-options dhcp-relay group dhcprelay interface irb.219
Heres how it was originally laid out
QFX3500 <===trunk===>EX4200<===trunk===>Cisco 3560
Then both the PXE server ( also handles DHCP, via noc-ps) and the client wer connected to this. To eliminate the issue of the cisco switch I connected them direclty to the Ex4200 so now the setup looks like this.
QFX3500 <===trunk===>EX4200 <== both clients connected directly to EX4200
This made some improvements as now instead of seeing no DHCP offrers received I'm getting this message on the client.
https://i.imgur.com/UTtsmdy.png
irb.219 = client / ge-0/0/43
irb.215 = pxe/dhcp server - ge-0/0/45
All vlans are trunked correctly, I've verified reachability between the 2 devices.
I've attached monitor traffic logs for both the IRB interfaces and the physical interfaces they are attached to. Aso the traceoptions all file for the QFX3500
Another note to add, I had an issue like this before on a EX4200 and the solution was adding firewall rules to allow the traffic through because the traffic passes through the loopback. I have the exact rules from the working QFX5100 on the 3500, and for testing purposes I've also removed the ACL completely from the loopback.
logs
EX4200 Ge-0/0/45 https://pastebin.com/BEZKdkmt
EX4200 Ge-0/0/45 https://pastebin.com/M3Xbw1zU
3500 irb.219 https://pastebin.com/auYyzgnt
3500 irb.215 https://pastebin.com/TvCs17rg
Traceoptions all https://pastebin.com/HttKeFpV
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