How to request a parameter from a DHCP server using dhclient without having to restart the network?

Question

DHCP

You need to get a specific parameter from the DHCP server.
If I do "/sbin/dhclient -r" then the network will disconnect.
I suspect that something can be done in dhclient-script or dhclient.conf, but I don't really understand what.
I found the -R parameter for dhclient in mana on the Internet (used to request a user-defined parameter list). But in my case, dhclient does not have this key.
OS version: SUSE LINUX Release 11
dhclient version: isc-dhclient-V3.1-ESV

Answer 1

I will describe in more detail:
Let's say I muddied my parameter on the DHCP server. The name of this parameter is "Parameter1". And then the moment came when I wanted to get this parameter from the DHCP server. I put it in the request section in the /etc/dhclient.conf file. I do / sbin / dhclient and get a network restart. How can I get my parameter without breaking the network connection.

Answer 2

Do renew without release and there will be no restart of the network, since in fact this is a lease extension, not a lease change. You will have the same address, but new parameters if changed (for example, new dns or def gw)