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Date: Wed, 13 Aug 1997 07:22:57 -0400 (EDT)
From: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com>
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Subject: kern/4295: SL/IP problems between 2.2.1 & 2.2.2
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>Number:         4295
>Category:       kern
>Synopsis:       SL/IP difficulties between 2.2.1 & 2.2.2
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Aug 13 10:00:01 PDT 1997
>Last-Modified:
>Originator:     Thomas David Rivers
>Organization:
dignus.com
>Release:        FreeBSD 2.2-2 i386
>Environment:

 Two FreeBSD machines; running a null-modem cable - one 2.2.1+ and
 one 2.2.2-RELEASE.

>Description:

 I've got a strange problem; two FreeBSD machines (one 2.2.1+ and one 2.2.2)
 with a hardwired null-modem cable.  Doing slattach's at 38400.  Here's
 the config's from the 2.2.1+ system:
	# ifconfig sl0
	sl0: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 552
        	  inet 10.0.0.8 --> 10.0.0.9 netmask 0xffffff00 
	# slattach -s 38400 -h -l /dev/cuaa1
	/var/run/slattach.cuaa1.pid

 and, here's the same information from the freshly-installed 2.2.2 
 system:
	# ifconfig sl0
	sl0: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 552
        	  inet 10.0.0.9 --> 10.0.0.8 netmask 0xffffff00 
	# slattach -s 38400 -h -l /dev/cuaa0
	/var/run/slattach.cuaa0.pid


 Now, from either system, I can ping the other (with a response time
of ~47.6ms).  However, I can't ftp or telnet from one to another,
in either direction.    In the past, this was caused by a VJ compression
mis-match (one had VJ and the other didn't) which is why I disabled
VJ compression on the slattach.

 Now - here's the _really_ interesting part - I can nfs_mount 
a file system on 10.0.0.9 exported by 10.0.0.8.  ls, etc.. seem to
work fine.  Telnet and FTP are the ones that hang...


>How-To-Repeat:

 	Set up a hardwired SL/IP connection between a 2.2.2 and 2.2.1 and 
	try to ftp/telnet.

>Fix:

	Not clear...	

>Audit-Trail:
>Unformatted: