how to use options -m append|replace|forward|discard in dhcrelay?

Hans Liss Hans at
Mon Mar 18 15:19:47 UTC 2013

Dear Ameen,

In short, it has to do with how the relay agent handles incoming packets that contain option-82 info. If you read the man page included with the program, you can find out much more about this. If the software is properly installed, the following command should work:
	man dhcrelay

Otherwise, you can try googling for the same thing:

Best regards,


On 18 Mar 2013, at 16:04, <ameen.shajahan at> wrote:

> Hi all,
> I would like to know how to use the options “-m append|replace|forward|discard” in dhcrelay.  What is the purpose and when it will be needed?
> If somebody tested dhcp relay with this configuration please let me updated the configuration.
> # ./dhcrelay --help
> Usage: dhcrelay [-4] [-d] [-q] [-a] [-D]
>                      [-A <length>] [-c <hops>] [-p <port>]
>                      [-pf <pid-file>] [--no-pid]
>                      [-m append|replace|forward|discard]
>                      [-i interface0 [ ... -i interfaceN]
>                      server0 [ ... serverN]
> Thanks,
> Ameen
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