#arpnetworks 2014-06-20,Fri

↑back Search ←Prev date Next date→ Show only urls(Click on time to select a line by its url)
WhoWhatWhen
***dne has quit IRC (Ping timeout: 260 seconds) [00:04]
mnathaniup_the_irons: thanks. I just tested it and the mtu is definitely higher than 1500 but its not as high as the other vps. for instance, this ping works with 4000 bytes on both vps but only on kvr29 when I switch it to 8000 bytes
ping6 fe80::21b:21ff:fe93:3e08%eth1 -M do -s 8500 		[00:15]
up_the_ironsso 8500 doesn't work on kvr02? [00:15]
mnathanialso, rsync fails, using my kvr02 vps, downloading from the backup server.
does not 		[00:15]
up_the_ironshmm.. weird
just checked all int's and they are 9k
maybe it's host related. kvr02 is still a Jaunty node, and kvr29 is Lucid 		[00:16]
mnathaniping6 fe80::21b:21ff:fe93:3e08%eth1 -M do -s 4034 << that one works on kvr02
ping6 fe80::21b:21ff:fe93:3e08%eth1 -M do -s 4035 << that one does not
not sure if those values have any significance 		[00:17]
up_the_ironsnot sure [00:18]
mnathanione of the successful pings: 4042 bytes from fe80::21b:21ff:fe93:3e08: icmp_seq=1 ttl=64 time=0.416 ms [00:18]
hazardousyall are insane
lol 		[00:22]
up_the_ironshazardous: i won't argue that ;)
kvr03 and kvr04 on the chopping block next week 		[00:24]
hazardouslol [00:24]
mnathanianyone seen something like this before: http://imgur.com/DMFrist [00:31]
up_the_ironshttp://support.arpnetworks.com/kb/main/ntp-servers
it's official 		[00:35]
hazardousare you dropping all ntp traffic at edge or something? [00:45]
........... (idle for 50mn)
mnathaniup_the_irons: mercutio: if the ARP metal port was switched to trunk, would the OS have to be aware of, and support VLan tags? [01:35]
acf_afaik yes
trunk == uses vlan tags 		[01:36]
plettDepending on which vendor's meaning of the word 'trunk' you are using, yes. I would expect the machine to need to be able to cope with 802.1q vlan tags [01:37]
mnathaniWindows would not qualify in this regard, would it [01:38]
plettAs something suitable for use on a server, no :)
Googling for "windows 802.1q" however, says that it is possible, it seems 		[01:39]
mnathaniessentially, the OS will be performing some of the switching task? [01:40]
mercutiomnathani: yes [01:41]
acf_it's like having two NICs afaik [01:41]
mercutiomnathani: don't worry it's easy
trunk is cisco terminology afaik 		[01:41]
acf_yeah [01:41]
plettThere are fancy ethernet cards which the OS can offload the vlan tagging to (and tcp checksumming etc), but they're not common. The OS would probably be handling the tags in software [01:42]
mercutioit's not really like having two nics, it's like having a subdivided nic
oh it's like two nics when using kvm virtual machine or such 		[01:42]
acf_eth0.1
eth0.2 		[01:42]
mercutioif you don't expose the root port to the vm, but instead the vlan's
i call my vlan's things like vlan1705 		[01:42]
plettI call them things like "mgmt" or "diskvlan" [01:43]
mercutiobasically on bsd you just do ifconfig vlan1705 vlandev em0 vlan 1705
and it will create an interface called vlan1705
over em0
plett: most ethernet cards can offload vlan
but it doesn't make any real difference
uhh even cheap realtek do vlan offload afaik
broadcom and intel definitely do 		[01:43]
plettAhh, I didn't know it was common these days. The last time I needed to know about ethernet card specifics, it was still a rare thing [01:45]
mercutioplett: maybe on 10/100 cards [01:46]
plettThese days all I need to know is that the on-board cards on the servers we buy are good enough for what I need to do :) [01:46]
mercutioplett: do you use i350s?
i350s can slpit into multiple cards
so you can pass a virtual machine a stub pci device, and it gets it's own queue and bypasses hypervisor 		[01:47]
plettNot specifically, but "buy intel" has always been a safe bet when choosing ethernet cards
That's interesting 		[01:48]
mercutioyou need vt-d support on the motherboard though
i was going ot try it, but i don't haev any spare pci-e x4 or wider slots :(
and yuo can't plug an x4 card into an x1 slot
i've got no idea why 		[01:49]
plettSo you could pass a 'raw' pci device in to a KVM guest and it would actually be tagged when it reaches the outside world
That would save any virtio overheads 		[01:50]
mercutioi dunno about the tagging
i wonder hwo that wroks
i want to try it even more now
but yeah it's more efficient
it's called vmdq often
http://www.intel.com/content/www/us/en/network-adapters/gigabit-network-adapters/io-acceleration-technology-vmdq.html
[01:51]
i should learn to condense my sentences :) [01:57]
......... (idle for 42mn)
***dne_ has joined #arpnetworks [02:39]
....... (idle for 30mn)
Hien has quit IRC (Ping timeout: 264 seconds)
Hien has joined #arpnetworks 		[03:09]
.......................................................... (idle for 4h47mn)
dne_ has quit IRC (Quit: WeeChat 0.4.3) [07:58]
........... (idle for 50mn)
dne_ has joined #arpnetworks [08:48]
brycecThey've become much more common than you may think, fwiw │01:42:03 plett | There are fancy ethernet cards which the OS can offload the vlan tagging to (and tcp checksumming etc), but they're not common. The OS would probably be handling the tags in software [08:53]
........ (idle for 39mn)
***dferris has joined #arpnetworks [09:32]
...... (idle for 26mn)
erratic has quit IRC (Ping timeout: 260 seconds) [09:58]
............ (idle for 58mn)
toddf has quit IRC (Ping timeout: 272 seconds) [10:56]
toddf has joined #arpnetworks
ChanServ sets mode: +o toddf 		[11:08]
.... (idle for 18mn)
CaZeWasn't there some gaming NIC that was supposed to reduce latency?
http://en.wikipedia.org/wiki/Killer_NIC 		[11:26]
BryceBotKiller NIC :: The Killer NIC (Network Interface Card), from Killer Gaming, is designed to circumvent the Microsoft Windows TCP/IP stack, and handle processing on the card via a dedicated network processor. Most standard network cards are host based, and make use of the primary CPU. The manufacturer claims that the Killer NIC is capable of reducing network latency and lag. The card was first introduced in 2006. Hardware and Models... [11:27]
m0undsthey got bought out by atheros
the nic's performance was pretty well aligned with a good intel nic
they had buggy drivers and software that accompanied the nic, and included weird stuff like host-based qos (qos for apps on a single machine) etc 		[11:40]
...... (idle for 25mn)
brycec"bro this is totally going to reduce my gaming lag"
(It was marketed towards gamers, as I recall) 		[12:06]
m0undsyep
it's now an onboard option on some "gaming" motherboards 		[12:08]
bryceclol
"Anandtech noted that the people who would stand to gain the most benefit from the Killer NIC, the low-end users, would also be the ones least likely to pay $280 for a network card." 		[12:10]
m0undshahahah [12:12]
brycecbrycec would just pickup a gfx card for that price, or much less. [12:12]
staticsafeIntel NICs do the job [12:13]
m0undsyeah, when i replaced my motherboard, i had to find one that had an intel nic and not killer or realtek
that was harder than it should have been 		[12:15]
....... (idle for 30mn)
***wacker has left [12:48]
......... (idle for 40mn)
mercutiothe new intel chips have lower latency than the older ones [13:28]
m0undsby what, .x number of ms? [13:34]
....... (idle for 30mn)
mercutioit's about 2/3rd of normal latency i think
but even with default coalescing settings vs tuned ones 		[14:04]
......................... (idle for 2h1mn)
up_the_ironsmnathani: yes, your OS would need to support VLANs. But, fortunately, they all do. [16:06]
........... (idle for 53mn)
<sigh...> http://arstechnica.com/security/2014/06/at-least-32000-servers-broadcast-admin-passwords-in-the-clear-advisory-warns/ [16:59]
BryceBotArs Technica: "At least 32,000 servers broadcast admin passwords in the clear, advisory warns" [16:59]
m0undshaha, yeah [17:02]
staticsafem0unds: http://www.twitch.tv/inicast Serversmash - Waterson vs Mattherson server smash [17:02]
m0undsstaticsafe: fun
i saw a thing about the ps2 dev team finding a server-side cause of bad hitreg that impacts 20+% of players 		[17:03]
staticsafeyeah [17:04]
m0undshitreg has been horrrrrrrible for a few months now
my ping to connery is less than 60, and i regularly end up having whole magazines fail to register a single hit, only to die to one huge damage impulse 		[17:05]
.............. (idle for 1h6mn)
brycecI've come to hate PlanetSide2 for no other reason than causing me to wonder who's still using+developing the PlayStation2. [18:11]
staticsafeLOL [18:12]
brycecHaven't had this issue with any other game either.
Makes me wonder how, with as many games released as there are, only PlanetSide2 stomps over another popular abbreviation 		[18:15]
m0undsit's developed by sony too [18:20]
staticsafeWaterson 48 - 43
damn 		[18:21]
mercutiowow up_the_irons
did you check your own servers? i know it's not open to the world, but would be curious if it happening none the less. 		[18:24]
m0undswow, 300+gbps ddos against hong kong's online voting systems yesterday
guess i missed that 		[18:31]
brycec@wa time in hong kong [18:34]
BryceBotcurrent time in Hong Kong;9:34:24 am HKT -> Saturday, June 21, 2014;1:34:24 am GMT -> Saturday June 21, 2014 [18:34]
brycecm0unds: it's because it hasn't happened yet. [18:34]
m0undsAAAAAAHHHHH
yesterday, 'murica time
i managed to get someone scheduled to come look at my air conditioner on monday 		[18:34]
mercutiom0unds: i thought it blew up? [18:36]
m0undscompressor surely did [18:36]
brycecHence why it needs repair/looking at [18:36]
mercutiooh right
i forget that it's not like an appliance that it brekas and you just get a new one 		[18:36]
m0undshahaha, yeah [18:36]
mercutiowel li suppose some people repair fridges. [18:37]
m0undswell, this is a 4ton (48kbtu) unit [18:37]
mercutioand they're the most similar appliance
oh 		[18:37]
brycecSmaller AC units are more like appliances [18:37]
m0undsyeah
this cools a whole 2300sq ft dwelling, sans garage 		[18:37]
mercutioi hate air conditioning myself
but i don't live in a desert. 		[18:37]
brycecBut big, house-cooling units are big. Too big to be a simple swap out. [18:37]
m0undsalso unholy expensive when they break [18:38]
mercutiowarranty? [18:38]
m0undsnegative, 8 years old [18:38]
mercutiodamn
good luck :) 		[18:38]
brycec"normal" warranties are against defects, not "wear" [18:38]
m0undshaha, thanks [18:38]
brycecHave fun, m0unds :) [18:38]
m0undsyeah, newer units have 10 year warranties if you get them svc'd yearly [18:39]
mercutiowhich costs more than getting a new one after 8 years i imagine [18:39]
m0undshmmm
nah
haha
$200/yr x 8 years
vs $8000+ for a new unit 		[18:39]
mercutio$8000?
wow
that's way more expensive than a heat pump 		[18:39]
m0undsyeah, it's old enough to use the phased out barely in production refrigerant
which is ~$120/lb 		[18:40]
mercutioand is expensive to run?
can you chaneg to the new coolant?
refrigerant
10+ year old fridges cost way moer to run 		[18:40]
m0undsyou can, but you lose ~10-15% efficiency and run the risk of further damage [18:41]
mercutioso i assume it similar
really? 		[18:41]
m0undsyeah, because there's no way to guarantee you've evac'd all of the oil and stuff out [18:41]
mercutiothere's two common ones now [18:41]
m0undsand the oil type used for one type of refrigerant isn't the same as what's used with the other [18:41]
mercutior134a is one? [18:41]
m0undsin smaller units, like cars and fridges [18:42]
mercutiooh right
so it's different 		[18:42]
m0undsthis is R-22 (old) and R-410a (new) [18:42]
mercutior22 was in fridges? [18:42]
m0undsno idea
it's in my air conditioning system
hahaha 		[18:42]
mercutiooh r12 was i think [18:42]
m0undsyeah, and old cars
my refrigerator is 134a iirc
it's a couple years old
hah, that's a ridiculous number of dead TR 		[18:42]
mercutiomy fridge uses r600a [18:44]
..... (idle for 22mn)
staticsafedat save by waterson [19:06]
m0undsyeah
i hate the octagon 		[19:13]
mercutioblow it up then? (jk) [19:16]
m0undswish i could [19:16]
mercutioyou should be careful about saying stuff like that
someone got into mega trouble by saying something about wanting to blow up in airport after his plane was severely delayed on twitter
and itw as taken out of context etc. 		[19:17]
m0undsbecause the NSA might misconstrue saying i want to blow up a fictional facility in a video game as intent to commit terrorist acts? [19:17]
mercutiooh?
oh is that fictional?
there's a oplitical place in this country with that name
so i thought it may be in other places too
well it's the city centre of one of the citys here
http://www.bbc.com/news/uk-england-18607798
ahh this is what iw as thinking of 		[19:17]
m0undshttp://i307.photobucket.com/albums/nn320/vulgarman/map%20stuff/PS2/octagon.jpg [19:19]
mercutioahh
why is it upside down? 		[19:20]
m0undscouldn't tell you [19:20]
staticsafe:( waterson lost [19:31]
m0undswomp womp [19:33]
staticsafem0unds: OMG
miscalc 		[19:35]
m0undshahahah
wow 		[19:35]
staticsafeFUCK YES [19:35]
m0undswinnars [19:35]
staticsafegg, won by one point [19:43]
................. (idle for 1h24mn)
***acf_ has quit IRC (Ping timeout: 255 seconds)
acf_ has joined #arpnetworks 		[21:07]
acf_ has quit IRC (Remote host closed the connection)
acf_ has joined #arpnetworks 		[21:14]
........... (idle for 50mn)
up_the_ironsmercutio: yeah some servers are vulnerable, but all our IPMI stuff is behind a VPN, so at least that is there. I also blocked that port today, so hopefully that'll help too. [22:04]
↑back Search ←Prev date Next date→ Show only urls(Click on time to select a line by its url)