Backpressure from the switches in terms of flow-control can show as latency on dragonwave links.
Disable any QOS features on the dragonwave if you are using them. Email dragonwave support Peter Kranz Founder/CEO - Unwired Ltd <http://www.unwiredltd.com/> www.UnwiredLtd.com Desk: 510-868-1614 x100 Mobile: 510-207-0000 <mailto:[email protected]> [email protected] From: Af [mailto:[email protected]] On Behalf Of Timothy D. McNabb via Af Sent: Wednesday, October 22, 2014 1:15 PM To: [email protected] Subject: Re: [AFMUG] Dragonwave latency issues No routers between, just switches. -Tim From: Af [mailto:[email protected]] On Behalf Of Paul Conlin via Af Sent: Wednesday, October 22, 2014 12:22 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Dragonwave latency issues Could the routers at each end be the limiting factor? What is their CPU utilization when the link is loaded? What happens to latency if you stress the link at 200 Mbps with a speed test? Those radios should be able to do close to 400 Mbps all day long with no latency. PC Blaze Broadband From: Af [mailto:[email protected]] On Behalf Of Joshua Heide via Af Sent: Wednesday, October 22, 2014 3:06 PM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Dragonwave latency issues Yes it's a horizon compact Bandwidth of the unit is 400mbs Bandwidth usage between 150-200mbs during peak hours. No QOS Yes during non-peak hours its sits at 1ms SNR 35.00 dB >From our prtg graphs this issues has started end of September and latency has gotten worse during peak times as we have deployed more 450 gear to that tower. I currently have HAAM enabled on the link and it stays at 256qam unless we have some bad weather. Josh Heide Velociter Wireless (office) 209-838-1221 (fax) 209-838-1800 <http://www.velociter.net/> www.velociter.net From: Af [mailto:[email protected]] On Behalf Of Bill Prince via Af Sent: Wednesday, October 22, 2014 11:47 AM To: [email protected] <mailto:[email protected]> Subject: Re: [AFMUG] Dragonwave latency issues So it's a Horizon Compact? What is the total bandwidth, and what percentage are you using? Have you set up any QOS? 180 ms sounds like a lot; especially when ours are typically less than 1 ms. -38 is right in the game. What are the other parameters besides signal level? bp On 10/22/2014 11:18 AM, Joshua Heide via Af wrote: We have a dragonwave that has latency issues that coincide with traffic peak times. As our traffic peaks so does that latency at 180ms. Any ideas that could cause this? Signal is -38 Current HAAM Mode hc50_364_256qam Thanks, Josh Heide Velociter Wireless (office) 209-838-1221 (fax) 209-838-1800 <http://www.velociter.net/> www.velociter.net
