Re: RFC 951 and BOOTP (fwd)

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#1881

From: WilliamChops Westfield
Date: Wed, 06 Jan 1993 23:27

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    By default, the Cisco router will not forward BOOTP requests
    (UDP broadcats).  You must configure the Cisco router to forward
    these UDP broadcasts.

    This can be done by using the ip forward-protocol global con-
    figuration command and an ip helper-address.  The ip forward-
    protocol command allows you to specify protocols and ports to
    be forwarded by the router.  The ip helper-address defines the
    destination host to receive the UDP broadcasts.

I believe that bootp is amoung the protocols that are forwarded by
default when a helper-address has been specified.

It's worth adding that the cisco routers DO fill in the protocol
fields within the bootp packet as described in the RFC (eg it is not
a simple forwarding of the raw packet - we provide the additional
info that is necessary for the bootp server to be able to send the
reply back to the host that issued the bootp request.)

BillW

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From: billw@glare.cisco.com (WilliamChops Westfield)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: RFC 951 and BOOTP (fwd)
Message-ID: <726370199.21725@news.Colorado.EDU>
Date: 6 Jan 93 23:27:33 GMT
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