[j-nsp] EX4300 DHCP-Relay issues

[Jason Healy]

On Jan 10, 2025, at 4:37 PM, Lee Starnes via juniper-nsp <juniper-nsp at puck.nether.net> wrote:
> 
> We ran into an issue while setting up a DHCP server that will be used for
> multiple vlans on several EX4300 switches. I am not sure if the issue we
> are seeing is because the server happens to reside on the same vlan as some
> of the test host machines, but what we are getting at the DHCP server side
> is the DHCP-Relay agent packets and also DHCP broadcast packets.

I'm not sure if what we're doing is best practice, but we saw those same duplicate packets and so we exclude DHCP relay on the IRB/VLAN where the DHCP server resides.  We just deactivated irb.XX in the "forwarding-options dhcp-relay group ..." stanza with a comment explaining why.

A little annoying but once it's set you don't really touch it and things have been working for quite some time this way.

Jason