nanog mailing list archives
Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey
From: "Vanbever Laurent" <lvanbever () ethz ch>
Date: Thu, 8 Jul 2021 14:43:22 +0000
Hi Jörg, Thanks for sharing your gray failure! With a few years of lifespan, it might well be the oldest gray failure ever monitored continuously :-) I'm pretty sure you guys exhausted all options already but... did you check for micro-bursts that may cause sudden buffer overflow? Or perhaps is your probing traffic already high priority? Best, Laurent
On 8 Jul 2021, at 15:58, Jörg Kost <jk () ip-clear de> wrote: We have a similar gray issue, where switches in a virtual chassis configuration with layer3-configuration seem to lose transit ICMP messages like echo or echo-reply randomly. Once we estimated it around 0.00012% ( let alone variances, or errors in measuring ). We noticed this when we replaced Nagios with some more bursting, trigger-happy monitoring software a few years back. Since then, it's reporting false positives from time to time, and this can become annoying. Besides spending a lot of time debugging this, we never had a breakthrough in finding the root cause, just looking to replace things in the next year. On 8 Jul 2021, at 15:28, Mark Tinka wrote:On 7/8/21 15:22, Vanbever Laurent wrote:Did you folks manage to understand what was causing the gray issue in the first place?Nope, still chasing it. We suspect a FIB issue on a transit device, but currently building a test to confirm. Mark.
Current thread:
- Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Vanbever Laurent (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Saku Ytti (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Mark Tinka (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Mark Tinka (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Vanbever Laurent (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey colin johnston (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Mark Tinka (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Jörg Kost (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Vanbever Laurent (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Baldur Norddahl (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Chriztoffer Hansen (Jul 09)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Saku Ytti (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Saku Ytti (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Vanbever Laurent (Jul 08)
- Re: Do you care about "gray" failures? Can we (network academics) help? A 10-min survey Saku Ytti (Jul 08)