Date: Fri, 26 Mar 2010 18:15:21 -0700 (PDT) From: "Joe R. Jah" <jjah@cloud.ccsf.cc.ca.us> To: Chuck Swiger <cswiger@mac.com> Cc: freebsd-questions@freebsd.org Subject: Re: OT: Keystrokes stick every ~1500 strokes Message-ID: <20100326175316.M58183@cloud.ccsf.cc.ca.us> In-Reply-To: <A206D6E1-7EAF-4F50-8460-8805F1E3419B@mac.com> References: <20100326162738.E48194@cloud.ccsf.cc.ca.us> <A206D6E1-7EAF-4F50-8460-8805F1E3419B@mac.com>
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On Fri, 26 Mar 2010, Chuck Swiger wrote:
> Date: Fri, 26 Mar 2010 17:31:38 -0700
> From: Chuck Swiger <cswiger@mac.com>
> To: Joe R. Jah <jjah@cloud.ccsf.cc.ca.us>
> Cc: freebsd-questions@freebsd.org
> Subject: Re: OT: Keystrokes stick every ~1500 strokes
>
> On Mar 26, 2010, at 5:18 PM, Joe R. Jah wrote:
> > Since last Monday my ssh connections started working erraticly. Today I
> > tested it by holding down a key until it stops printing, and made several
> > itterations; it turns out that ~1500 key strokes print on the screen; then
> > it stops responding for several seconds; then it spits out ~25 missed
> > keystrokes.
>
> Sounds like a path MTU problem; perhaps something thinks it should be doing Jumbo frames and can't, or perhaps VLAN tagging or something else is being used....
>
> ping -s 1480 hostname and similar can be helpful.
Thank you Chuck for the suggetion; here's the ping response from three
different servers:
HP Unix server
# ping ip 1480 -n 3
PING ip: 1480 byte packets
1480 bytes from ip: icmp_seq=0. time=0. ms
1480 bytes from ip: icmp_seq=1. time=0. ms
1480 bytes from ip: icmp_seq=2. time=0. ms
----ip PING Statistics----
3 packets transmitted, 3 packets received, 0% packet loss
round-trip (ms) min/avg/max = 0/0/0
Solaris server:
# ping -s ip 1480 3
PING ip: 1480 data bytes
1488 bytes from ip: icmp_seq=0. time=1. ms
1488 bytes from ip: icmp_seq=1. time=0. ms
1488 bytes from ip: icmp_seq=2. time=0. ms
----ip PING Statistics----
3 packets transmitted, 3 packets received, 0% packet loss
round-trip (ms) min/avg/max = 0/0/1
FreeBSD server:
# ping -s 1480 ip
ping: packet size too large: 1480 > 56: Operation not permitted
Any ideas?
Regards,
Joe
--
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