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- From: rich@Rice.edu (Richard Murphey)
- Subject: Re: [386bsd]: SLIP woes (packetsize > 876)
- In-Reply-To: bvickers@valentine.ics.uci.edu's message of 11 Nov 92 01:00:42 GMT
- Message-ID: <RICH.92Nov10220937@omicron.Rice.edu>
- Sender: news@rice.edu (News)
- Reply-To: Rich@rice.edu
- Organization: Department of Electrical and Computer Engineering, Rice
- University
- References: <2B005B3A.17158@ics.uci.edu>
- Date: Wed, 11 Nov 1992 04:09:37 GMT
- Lines: 23
-
- In article <2B005B3A.17158@ics.uci.edu> bvickers@valentine.ics.uci.edu (Brett J. Vickers) writes:
- I just got SLIP up and running on my computer. However, whenever I
- try to send a packet of size greater than or equal to 877 bytes,
- nothing happens. The process trying to send such a packet just sits
- there and hangs. I found this out using "ping -s869 wherever" (ping
- adds 8 bytes to the packet).
-
- I'm using the standard 386BSD if_sl.[ch] files. Anyone know why
- this is happening?
-
-
- Look at /sys/net/if_sl.c. The output packet size is limited to 296
- (the value of SLMTU).
-
- The comments there contain a careful discussion on the trade offs
- between fractional overhead of ip headers at lower values v.s. latency
- in interactive TCP connections at higher values.
-
- Maybe ICMP packets are not fragmented. Rich
-
- --
- Brett J. Vickers
- bvickers@ics.uci.edu
-