Re: Change DHCP-Server Address
Glenn Satchell <[email protected]>
| Newsgroups | gmane.network.dhcp.isc.dhcp-client |
|---|---|
| Message-ID | <[email protected]> |
But it can be a hostname, dhcpd resolves that to an IP address at startup. Same as specifying DNS server, next-server, and many other places. Regards, Glenn On 28 Jun 2021 11:24 p.m., Bernd Nachtigall <[email protected]> wrote: With the recommended option in dhcpd.conf it is running perfect :-) But maybe they may clean up the documentation: server-identifier hostname; ... The value specified must be an IP address for the DHCP server, ... Maybe is is more clear to write: server-identifier IP-Address; ... The value specified must be an IP address for the DHCP server, ... Jm2c Bernd Am 28.06.21 um 08:50 schrieb [email protected]: > On 2021-06-28 16:31, Bernd Nachtigall wrote: >> Hi, >> >> there is a DHCP-Service which is configured to use a secondary >> IP-Address. This runs fine. >> >> Main IP: 10.12.251.12 Sec. IP: 10.12.251.111 >> >> But when check the answers from the service at a client it seems >> that the service use the main IP as sender. Is there a way to >> configure the dhcpd that it uses the sec. IP-Addr. as 'from' when >> answering to clients? >> >> Bernd > > Hi Bernd > > Looks like you need to use the server-identifier statement. This is > from the dhcpd.conf man page: > > The server-identifier statement > > server-identifier hostname; > > The server-identifier statement can be used to define the value that > is sent in the DHCP Server Identifier option for a given scope. The > value specified must be an IP address for the DHCP server, and > must be reachable by all clients served by a particular scope. > > The use of the server-identifier statement is not recommended - > the only reason to use it is to force a value other than the default > value to be sent on occasions where the default value would be > incorrect. The default value is the first IP address associated with > the physical network interface on which the request arrived. > > The usual case where the server-identifier statement needs to be sent > is when a physical interface has more than one IP address, and the > one being sent by default isn't appropriate for some or all > clients served by that interface. Another common case is when an > alias is defined for the purpose of having a consistent IP address > for the DHCP server, and it is desired that the clients use this IP > address when contacting the server. > > Supplying a value for the dhcp-server-identifier option is equivalent > to using the server-identifier statement. > > regards, Glenn > > _______________________________________________ ISC funds the > development of this software with paid support subscriptions. Contact > us at https://www.isc.org/contact/ for more information. > > dhcp-users mailing list [email protected] > https://lists.isc.org/mailman/listinfo/dhcp-users _______________________________________________ ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. dhcp-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/dhcp-users _______________________________________________ ISC funds the development of this software with paid support subscriptions. Contact us at https://www.isc.org/contact/ for more information. dhcp-users mailing list [email protected] https://lists.isc.org/mailman/listinfo/dhcp-users