From owner-freebsd-questions@FreeBSD.ORG Sat Mar 27 01:15:21 2010 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 70EF31065674 for ; Sat, 27 Mar 2010 01:15:21 +0000 (UTC) (envelope-from jjah@cloud.ccsf.cc.ca.us) Received: from cloud.ccsf.cc.ca.us (cloud.ccsf.cc.ca.us [147.144.1.212]) by mx1.freebsd.org (Postfix) with ESMTP id 5C4648FC18 for ; Sat, 27 Mar 2010 01:15:21 +0000 (UTC) Received: from cloud.ccsf.cc.ca.us (localhost.ccsf.cc.ca.us [127.0.0.1]) by cloud.ccsf.cc.ca.us (8.14.2/8.14.2) with ESMTP id o2R1FMmN059656; Fri, 26 Mar 2010 18:15:22 -0700 (PDT) (envelope-from jjah@cloud.ccsf.cc.ca.us) Received: from localhost (jjah@localhost) by cloud.ccsf.cc.ca.us (8.14.2/8.14.2/Submit) with ESMTP id o2R1FLqI059652; Fri, 26 Mar 2010 18:15:21 -0700 (PDT) (envelope-from jjah@cloud.ccsf.cc.ca.us) Date: Fri, 26 Mar 2010 18:15:21 -0700 (PDT) From: "Joe R. Jah" To: Chuck Swiger In-Reply-To: Message-ID: <20100326175316.M58183@cloud.ccsf.cc.ca.us> References: <20100326162738.E48194@cloud.ccsf.cc.ca.us> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: freebsd-questions@freebsd.org Subject: Re: OT: Keystrokes stick every ~1500 strokes X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Mar 2010 01:15:21 -0000 On Fri, 26 Mar 2010, Chuck Swiger wrote: > Date: Fri, 26 Mar 2010 17:31:38 -0700 > From: Chuck Swiger > To: Joe R. Jah > 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 -- _/ _/_/_/ _/ ____________ __o _/ _/ _/ _/ ______________ _-\<,_ _/ _/ _/_/_/ _/ _/ ......(_)/ (_) _/_/ oe _/ _/. _/_/ ah jjah@cloud.ccsf.cc.ca.us