Description

This Article explains the behaviour of DHCP when client is a Juniper Device.


Symptoms

DHCP transit packet was getting dropped from the device.

Solution

If dhcp client is a Juniper device, remove below config

delete forwarding-options dhcp-relay relay-option starts-with ascii Juniper

Allow dhcp relay ip in source address in lo0 filter as below (relay IP need to change based on location):

set firewall family inet filter CONTROLPLANE-IN term DHCP-RELAY-CLIENT from source-address X.X.X.X

Ensure that the incoming interface is configured under dhcp-relay hierarchy(example given below):

set forwarding-options dhcp-relay group TOR interface <interace>

Modification History

2024-10-09 : Article Created