TransactionID field of BootP/DHCP - random generated once or every time?

Question

I have to work with a device sending BootP request with the same TransactionID every time, since DHCP RFC says that

" xid 4 Transaction ID, a random number chosen by the client, used by the client and server to associate messages and responses between a client and a server."

Does it mean that TransactionID is generated randomly once and use it forever or it shoul be generated randomly on every BootP Request?

Answer 1

The answer is no.

Transaction ID in DHCP packets can be changed.

You can observe it even in the pair of DHCP Discovery and Request.