Listening on interface without IP address

[John W. Blue]

What is not free?  GUI or RFC1918 address space?

John

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________________________________
From: Miloslav Hůla <miloslav.hula at gmail.com>
Sent: Thursday, June 13, 2019 7:11 AM
To: dhcp-users at lists.isc.org
Subject: Listening on interface without IP address

Hi,

we maintain about 200 VLANs with ISC DHCP server, relay running on
central box.

But the relay is somehow broken and I'm thinking how to bypass that.
Unfornutaly, we have no free IPv4 addresses for 2 DHCP servers.

Is it possible to configure ISC DHCP server to listen on given interface
but without IPv4 address on it?

No subnet declaration for eth0.376 (no IPv4 addresses).
** Ignoring requests on eth0.376.  If this is not what
    you want, please write a subnet declaration
    in your dhcpd.conf file for the network segment
    to which interface eth0.376 is attached. **

Somehow specify in dhcpd.conf where eth0.376 belongs to?

shared-network VLAN-376 {
        ... for interface eth0.376
}

Milo
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