Time Warner Cable issues in Ohio ?
We're seeing some strange issues with our fiber connection to TWC in Ohio. Intermittent packet loss to/from some IPs. It gets as specific as from a certain IP outside our network, packets to a.b.c.10 are fine, but pings to a.b.c.50 (same subnet of same netblock) lose ~75% of the packets. Likewise, from one of our IPs, connections are fine to a particular remote host, but not to another host on the same network. Connections to/from some other IPs (and some whole networks) are totally fine. It almost seems that some piece of gear somewhere is barfing on packets that have a particular set of bits in the source and/or destination address. We have manually failed over to a backup connection, and are 100% fine now. I just want to see if anyone has seen anything similar, or has any info. I am on hold now waiting for someone at TWC. thanks, -Randy
Re: Time Warner Cable issues in Ohio ?
Sounds very much like an issue with a link aggregation. Seen this a couple of times with various carriers...apparently monitoring lag's isnt a top priority nowadays. Try to find out which hop is causing the problems (do multiple traceroute's or use mtr on affected and unaffected servers) and drop TWC a mail. Am Dienstag, den 28.02.2012, 18:22 -0500 schrieb Randy Carpenter: We're seeing some strange issues with our fiber connection to TWC in Ohio. Intermittent packet loss to/from some IPs. It gets as specific as from a certain IP outside our network, packets to a.b.c.10 are fine, but pings to a.b.c.50 (same subnet of same netblock) lose ~75% of the packets. Likewise, from one of our IPs, connections are fine to a particular remote host, but not to another host on the same network. Connections to/from some other IPs (and some whole networks) are totally fine. It almost seems that some piece of gear somewhere is barfing on packets that have a particular set of bits in the source and/or destination address. We have manually failed over to a backup connection, and are 100% fine now. I just want to see if anyone has seen anything similar, or has any info. I am on hold now waiting for someone at TWC. thanks, -Randy
Re: Time Warner Cable issues in Ohio ?
On Feb 28, 2012, at 15:22, Randy Carpenter rcar...@network1.net wrote: We're seeing some strange issues with our fiber connection to TWC in Ohio. Intermittent packet loss to/from some IPs. It gets as specific as from a certain IP outside our network, packets to a.b.c.10 are fine, but pings to a.b.c.50 (same subnet of same netblock) lose ~75% of the packets. Likewise, from one of our IPs, connections are fine to a particular remote host, but not to another host on the same network. Connections to/from some other IPs (and some whole networks) are totally fine. It almost seems that some piece of gear somewhere is barfing on packets that have a particular set of bits in the source and/or destination address. LACP somewhere with a partial link failure? -- Pete
