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- Path: sparky!uunet!dziuxsolim.rutgers.edu!grimaldi.rutgers.edu!jim
- From: jim@grimaldi.rutgers.edu (Jim Martin)
- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Subject: Re: Fragmented IP packets: any PD implementations?
- Keywords: IP fragments TCP/IP
- Message-ID: <Nov.9.23.58.54.1992.3394@grimaldi.rutgers.edu>
- Date: 10 Nov 92 04:58:55 GMT
- References: <1992Nov8.203621.6902@mnemosyne.cs.du.edu> <BxGtps.BHM@watserv1.uwaterloo.ca>
- Organization: Rutgers Univ., New Brunswick, N.J.
- Lines: 34
-
- erick@demorgan.uwaterloo.ca (Erick Engelke) writes:
- >I might be convinced to add frag support, but would appreciate
- >opinion if it is a good idea, in particular, which applications
- >could use it. NFS is not a great answer since it would be useful
- >even with 1K packet sizes, the problem there is the lack of an
- >implementation. I know the Host Requirements RFC tells us what
- >to do, but I would prefer to see an application which needs it.
-
- Well, I'd really like to see it happen. My situation is this.
- I've got a bunch of modem on a cisco terminal server, any of which can
- be used for slip. Now, the SLIP rfc suggests that you use a mtu of
- 1006, which is what most SLIP client (far end) implementations expect.
- Therefore, a large packet coming off the ethernet with a 1500 mtu gets
- fraged to traverse the slip link. Now, if I want something like CUTCP
- to work on the far end, I need to up the mtu to 1500 so no frags get
- generated. Unfortunately, this breaks several other client-end
- implementations, FTP Inc's stuff most noteably (they allow you to drop
- the mtu, but not up it). Therefore I'm stuck in a situation where I
- am unable to make everyone happy. Having CUTCP and others support
- frags would solve this (well, at least solve the SLIP part of
- happiness :)
-
- Jim
-
- P.S. Erick, I didn't realize that this problem existed with WATTCP as
- well. I'll have to put fragment reassembly on my to-do list! :)
-
-
-
-
- --
- Jim Martin Internet: jim@dorm.rutgers.edu
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- Rutgers University Phone: (908) 932-3719
-