[dhcwg] Question on DHCP reconfigure extension (RFC 3203)

Hi,

Reading the RFC3203 on ForceRenew, it is not very specific 
how servers should format the DHCP packet, if just refer to
"the normal DHCP message layout". 

Since this is a server initiated packet, can the server 
then select a new xid for the DHCP packet, or does it have 
to used the same xid as the client used in the last packet 
it send to the server ?

Also RFC3203 says that any ForceRenew message MUST be 
authenticated using the procedures as described in [DHCP-AUTH],
that seems like a strong requirement, and I read that like
any clients support of RFC3203 can only happen if they
also support DHCP Authentication Option 90, is that the
intent of this requirement, or is it more a resommendation
that DHCP Auth. is good for the security :)

thanks,
Peter

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