About dhcp

the_return_of_the_Ring

I configured one router of mine to be dhcp server, now if i connect a switch to it, works. but if i connect another router(say routerB) to it, I don't see ip assigned. do i need to turn on/off some function on routerB or what?

BubbaJ

madonion wrote:

I configured one router of mine to be dhcp server, now if i connect a switch to it, works. but if i connect another router(say routerB) to it, I don't see ip assigned. do i need to turn on/off some function on routerB or what?

Routers don't normally get addresses assigned to them. It is possible, but it is certainly not a CCNA level subject. As a rule, you would like your network infrastructure devices to have known addresses so that you can manage them.

You should practice configuring the routers and switches yourself.

rossonieri#1

hello,

router doesnt forward dhcp packet,
to allow this you need to allow the port 67/68 to forward/receive the dhcp packet,
and specify the ip helper addr on the receiver router.

cheers.

ciscos

check out the command : ip helper address.
dhcp uses broadcast.
routers do not forward broadcast.

cheers.

rockstar81

if your router supports bootp this might help as it the router will allow it through.

david_r

madonion,
If you want your router to obtain an ip address automagically, drill down through

ip address dhcp

under the interface you want to assign via dhcp. You may also need to add an ip helper address on the incoming interface or globally.