Re: Help on packet fragmentation

[John Heidemann <johnh@ISI.EDU>]

On Thu, 13 Aug 1998 16:35:28 EDT, Keith Chow wrote: 
>Hi ns users,
>
>I would like to implement a simple packet fragmentation.
>That is, whenever a node or queue receives a packet 
>having a size bigger than MTU, this packet will be
>fragmented into several pieces and send them along.
>
>I tried the following procedure but failed:
>1. duplicating the original packet,
>2. changing the packet size of the duplicate to MTU, and
>3. send it out.
>4. Goto 1. if the remaining pkt size is still bigger than MTU
>
>However, it causes lots of problems at all downstreams node. 
>I guess it is 'cause the fields of the packet fragments are all
>identical.
>
>Has anybody got a hint how I can do it?

One-way ns tcp numbers packets, not bytes; this would have to change
for it to support fragmentation.

Kevin, can you comment if full-tcp would work better for this?

   -John Heidemann