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- Newsgroups: comp.protocols.tcp-ip
- Path: sparky!uunet!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!mcdchg!mcdphx!geranen
- From: geranen@phx.mcd.mot.com (Scott Geranen)
- Subject: Re: BOOTP and the first stage bootstrap
- Message-ID: <1993Jan5.160017.17522@phx.mcd.mot.com>
- Sender: news@phx.mcd.mot.com
- Nntp-Posting-Host: crosby.phx.mcd.mot.com
- Organization: Motorola Computer Group, Tempe, Az.
- References: <1993Jan4.173958.17884@dg-rtp.dg.com> <1ia2pvINNj7b@usenet.INS.CWRU.Edu>
- Date: Tue, 5 Jan 1993 16:00:17 GMT
- Lines: 44
-
- In article <1ia2pvINNj7b@usenet.INS.CWRU.Edu> trier@slc6.ins.cwru.edu (Stephen C. Trier) writes:
- >In article <1993Jan4.173958.17884@dg-rtp.dg.com> peterson@commtg3.rtp.dg.com (Kevin Peterson) writes:
- >>Is there a configuration option in bootp that will allow a
- >>client to get a bootp request from one machine and the first
- >>stage bootstrap from another machine.
- >
- >This seems to be an ugly part of the BOOTP protocol. If you look in section
- >7.3 of RFC 951, the client is expected to use the siaddr field as the TFTP
- >server's IP address and sname as the name. I would think it would be safe to
- >set siaddr and sname to something other than the BOOTP server's address.
- >Why would the client want the BOOTP server's address? What it really needs
- >is the TFTP (or other boot protocol) boot address.
- >
- >I'm sure this will be a controversial suggestion, but I think it's justified.
- >It satisfies the use of the siaddr (and sname) fields, if not the intent.
- >If it really bothers you, think of it as "proxy BOOTP". ;-)
-
- I have done exactly this. The only "trick" is that the CMU bootpd server
- checks to see if the download file is on the system. When the new "sa"
- (server address) tag is used in the bootptab file it doesn't check for the
- file -- I didn't want to try to verify that the file existed on the remote
- system. I've sent this modification to CMU but I haven't seen it come back
- out.
-
- Also, as noted in a later post, you need to send the gateway and subnet
- mask if you're booting through a gateway.
-
- Another useful modification I made was to be able to use host names instead
- of IP addresses for the "ip" tag. I hate duplicating information already
- in the hosts file.
-
- >
- >--
- >Stephen Trier "We want to offer you a price that you
- >Network software type just can't afford to take advantage of."
- >Case Western Reserve University - Sales blurb from HSC Software
- >trier@ins.cwru.edu
-
-
- --
- Scott Geranen Internet: geranen@phx.mcd.mot.com
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