Do you mean (1) if the router is acting as a bootp or DHCP server? Or (2) if bootp or DHCP broadcasts received on one interface are being forwarded to a remote server on another interface?
Here's an answer to (2).
Look at the startup-config and running-config. If "ip helper-address" command is listed under a particular interface, then bootp broadcasts heard on that interface should be forwarded to the specified IP address.
The "ip helper-address" command forwards the following UDP ports by default:
dns or domain (53)
bootp server or bootps (67)
bootp client or bootpc (68)
netbios name service or netbios-ns (137)
netbios datagram service or netbios-dgm (138)
DHCP uses the same ports as bootp.
A sample configuration that supports forwarding only DHCP requests heard on two interfaces to a DHCP server (192.168.0.10) on a third interface follows. Note how forwarding (or blocking forwarding) of the other default protocols is done at the system level; while the helper-address is configured interface by interface.
description This is the subnet where the DHCP server lives
ip address 192.168.0.1 255.255.255.0
description This is where some DHCP clients live and need DHCP forwarded
ip address 192.168.1.1 255.255.255.0
ip helper-address 192.168.0.10
description This is where other DHCP clients live and need DHCP forwarded
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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