OT: Keystrokes stick every ~1500 strokes
Hi, 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. It's probably not the number of key strokes but the length of time it takes to hold down a key until characters stop showing on the screen; the number turns out to be ~1500. I have the same problem on several different servers, Solaris, HP Unix, FreeBSD, Linux, so it's definitely not the server setup; it's the network. Last Monday our netadmin retired from networking and we got a new netadmin. I have already reported it to the new netadmin, but he doesn't seem to know what he's done wrong. Is there anything I can check from my servers to figure out what the new netadmin has done wrong? Here's the ifconfig output of my FreeBSD server's active interface: # ifconfig bce0 bce0: flags=8843UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST mtu 1500 options=3bRXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU inet myIP netmask 0xff00 broadcast myNetmask ether 00:3e:0c:bc:c5:13 media: Ethernet autoselect (1000baseTX full-duplex) status: active Please advise. Regards, Joe -- _/ _/_/_/ _/ __o _/ _/ _/ _/ __ _-\,_ _/ _/ _/_/_/ _/ _/ ..(_)/ (_) _/_/ oe _/ _/. _/_/ ahj...@cloud.ccsf.cc.ca.us ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
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. Regards, -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: OT: Keystrokes stick every ~1500 strokes
On Fri, 26 Mar 2010, Chuck Swiger wrote: Date: Fri, 26 Mar 2010 17:31:38 -0700 From: Chuck Swiger cswi...@mac.com To: Joe R. Jah j...@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 -- _/ _/_/_/ _/ __o _/ _/ _/ _/ __ _-\,_ _/ _/ _/_/_/ _/ _/ ..(_)/ (_) _/_/ oe _/ _/. _/_/ ahj...@cloud.ccsf.cc.ca.us ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
