Re: [WIRELESS-LAN] IPv6 drains battery of mobile devices?
Thanks Bruce for the nice overview and +1 for the last remark. A search for battery drain and IPv6 gives you tons of hits. I tested the RA myth one year ago by two SSIDs with different RAs (1 SSID with 500 RA/h and the other 30/h). Outcome: hardly any effect. (inspite of the RFC on this topic where Cisco and Google blame IPv6: https://www.rfc-editor.org/rfc/rfc7772.txt) My experience is that mainly Samsung devices (upto but not including the S7) suffer from battery drain with IPv6. I saw no significant effects on iPhones, HTC devices and windows phones. I found an article that confirm this, blaming Samsung for choosing their own firmware and doing a bad job (sorry, cannot find the article any more). See also: https://issuetracker.google.com/issues/36949115 -Frans On 06/10/2017, 18:34, "The EDUCAUSE Wireless Issues Constituent Group Listserv on behalf of Curtis, Bruce" wrote: > >This is an issue with the configuration on that particular WiFi network and >not an architectural issue with IPv6. > >http://www.ibtimes.co.uk/why-your-smartphone-battery-being-drained-google-cisco-blame-ipv6-network-misconfiguration-1544393 > > >IPv4 with NAT does have some architectural issues. > >https://www.computerworld.com/article/2494064/internet/ipv6-can-boost-mobile-performance--battery-life--proponents-say.html > > > Measurements on properly configured networks show little difference in > power. But these measurements were during active use. > >https://tools.ietf.org/html/draft-petrescu-v6ops-ipv6-power-ipv4-00 > > >Cloudfare’s view: > >"That means that a v6-only mobile phone (looking at you, T-Mobile users) can >establish a clean path to any site or mobile app behind Cloudflare instead of >doing an expensive 464XLAT protocol translation as part of the connection >(shaving milliseconds and conserving very precious battery life)." > >https://blog.cloudflare.com/always-on-ipv6/ > > > >https://blog.wirelessmoves.com/2008/03/why-ipv6-will-b.html > >Check out the slide titled “IPv6 brings savings in battery life” about 8 >minutes into the video. > >https://www.youtube.com/watch?v=o5RbyK0m5OY > > >Another RFC for network administrators. > >https://tools.ietf.org/html/rfc7772 > > >So if you find that a specific WiFi network accelerates battery drain send >some of the info mentioned in this thread to your local WiFi network >administrators but don’t tell the world to turn off IPv6. > > >> On Oct 6, 2017, at 7:32 AM, Mike King wrote: >> >> So I saw this on Reddit this morning. What do you guys think of this? >> >> >> https://www.reddit.com/r/LifeProTips/comments/74jt7s/lpt_if_youre_in_student_halls_campus_or_hotel/ >> ** Participation and subscription information for this EDUCAUSE >> Constituent Group discussion list can be found at >> http://www.educause.edu/discuss. >> > >--- >Bruce Curtis bruce.cur...@ndsu.edu >Certified NetAnalyst II701-231-8527 >North Dakota State University > > >** >Participation and subscription information for this EDUCAUSE Constituent Group >discussion list can be found at http://www.educause.edu/discuss. > ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
Re: [WIRELESS-LAN] Portable Power for Mesh APs
I’ve been doing a lot of APoaS surveys with the Revolt G2. http://www.portableuniversalpower.com/revolt-g2/ I have another engineer using the RavPower: https://www.ravpower.com/ravpower-23000mah-portable-charger-external-battery-charger.html We use these with a 12V Poe+ injector from Tycon. If your AP takes 12V directly, it may not be needed. With the Revolt G2 I’m good for a full day with a 802.3at powered AP. Higher powered APs may give you less. Sent from my iPhone > On Oct 8, 2017, at 10:52 AM, Chris Adams (IT) wrote: > > It looks like this is for temporary use, but what kind of runtimes are you > getting from this unit with a WAP attached? > > > Thanks, > > Chris Adams > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of James Helzerman > Sent: Saturday, October 7, 2017 10:28 PM > To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU > Subject: Re: [WIRELESS-LAN] Portable Power for Mesh APs > > Either or. Looking to see if anyone else has done this type of thing. I was > trying to find alternatives that are either cheaper or have a multi-purpose > ability so its not a one time use. > > We use this for site surveys but is about $250 each and is only useful for > PoE. It works very well and is nice to have the ethernet port pass through, > unfortunately surveys or temp installations are its only useful purpose for > me. For the temp event I would need 10-15 units. > > https://www.bhphotovideo.com/c/product/1220949-REG/veracity_vad_psp_pointsource_plus_battery_powered.html > > -Jimmy > > On Sat, Oct 7, 2017 at 9:59 PM, GT Hill wrote: > Are you looking for a complete solution or a less expensive DIY? > > GT > > From: The EDUCAUSE Wireless Issues Constituent Group Listserv > on behalf of James Helzerman > > Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv > > Date: Saturday, October 7, 2017 at 8:20 PM > To: > Subject: [WIRELESS-LAN] Portable Power for Mesh APs > > Hi. Is anyone using portable power for temporary Mesh APs? If so what model > device are you using? Ie portable jump starter with AC outlets, portable > battery pack with 802.3at power, etc. > > We have an event coming up and are looking at different ways to provide power > to access points for 6 hours that will connect via Mesh. Some locations will > have multiple access points so a single power source that has multiple > outlets / connections would be ideal. > > Thanks, > > -Jimmy > > -- > James Helzerman > Wireless Network Engineer > University of Michigan - ITS > Phone: 734-615-9541 > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/discuss. > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/discuss. > > > > -- > James Helzerman > Wireless Network Engineer > University of Michigan - ITS > Phone: 734-615-9541 > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/discuss. > ** Participation and subscription information for this EDUCAUSE > Constituent Group discussion list can be found at > http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
RE: [WIRELESS-LAN] Portable Power for Mesh APs
It looks like this is for temporary use, but what kind of runtimes are you getting from this unit with a WAP attached? Thanks, Chris Adams From: The EDUCAUSE Wireless Issues Constituent Group Listserv [mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU] On Behalf Of James Helzerman Sent: Saturday, October 7, 2017 10:28 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] Portable Power for Mesh APs Either or. Looking to see if anyone else has done this type of thing. I was trying to find alternatives that are either cheaper or have a multi-purpose ability so its not a one time use. We use this for site surveys but is about $250 each and is only useful for PoE. It works very well and is nice to have the ethernet port pass through, unfortunately surveys or temp installations are its only useful purpose for me. For the temp event I would need 10-15 units. https://www.bhphotovideo.com/c/product/1220949-REG/veracity_vad_psp_pointsource_plus_battery_powered.html -Jimmy On Sat, Oct 7, 2017 at 9:59 PM, GT Hill mailto:g...@gthill.com>> wrote: Are you looking for a complete solution or a less expensive DIY? GT From: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on behalf of James Helzerman mailto:jarh...@umich.edu>> Reply-To: The EDUCAUSE Wireless Issues Constituent Group Listserv mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Date: Saturday, October 7, 2017 at 8:20 PM To: mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> Subject: [WIRELESS-LAN] Portable Power for Mesh APs Hi. Is anyone using portable power for temporary Mesh APs? If so what model device are you using? Ie portable jump starter with AC outlets, portable battery pack with 802.3at power, etc. We have an event coming up and are looking at different ways to provide power to access points for 6 hours that will connect via Mesh. Some locations will have multiple access points so a single power source that has multiple outlets / connections would be ideal. Thanks, -Jimmy -- James Helzerman Wireless Network Engineer University of Michigan - ITS Phone: 734-615-9541 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. -- James Helzerman Wireless Network Engineer University of Michigan - ITS Phone: 734-615-9541 ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/discuss.
