[dhcwg] DHCPv4: Relay agents and packet sizes

[Bud Millwood <[e-mail]>]

Hello all, hope everyone is well. Long time no see. I could use some advice:

Our DHCP server responds to clients with the same size packet as the
client sends us unless A) it's smaller than the minimum size or B) the
max-message-size option is present. In the case of (A) we bring it up
to the minimum size, in the case of (B) we use the max-message-size.

I have a CMTS that is placing both Remote ID and Circuit ID in DHCPv4
packets, and the Circuit ID is quite large (40 bytes?). I'm running
out of space in my response packet.

There is no max-message-size here, and we aren't overloading the file
or sname fields.

Any advice on the best way to handle this? For maximum compatibility,
should I be overloading the file/sname fields, or increasing the
packet size? (Increasing seems downright crazy)

What approaches do you use when you're getting squeezed like this?

Thanks in advance for any advice.

- Bud