Having trouble locating the latest firmware for your HP ProCurve switch? Here’s where to find it: Continue reading “HP ProCurve 1810-24G – Where to find the latest firmware updates”
Welcome to Part 01 of our Asus DSL-AC68U modem router review! This is Asus’ latest effort and it sports a pretty impressive spec sheet;
- Wireless router + ADSL modem
- Dual CPUs to assist with range and stability
- USB 3.0 port – printer sharing, file sharing, 3G/4G internet dongle
- Asus AiCloud – Asus’ home cloud solution
- Asus AiRadar – universal beamforming for A/B/G/N/AC wifi signals
- Wireless A,B,G,N and AC – 1300MHz theoretical max speed on 5GHz AC
- 3x external, removable antennas
If you have selected the minimal install option you might be surprised by just how minimal it is; one example is that the ifconfig command is not available. The command yum install ifconfig doesn’t work – it’s part of another broader package. We can find out which one that is by running:
yum provides ifconfigThrough that we can see that the net-tools package installs it. Run:
yum install net-tools…and you should be able to now use ifconfig.
We measured the ProCurve 2510-24’s power usage:
Idle: 11.9W Peak: 14.8WThis was measured on a 240V power circuit with a handful of devices attached (5). The peak wattage was measured during power-on and idle was steady around 11.9W. We would expect power usage to increase as you add more bandwidth-heavy devices; however, now that many of these switches are falling into the hands of home enthusiasts for connecting things like low-bandwidth computers, printers, Raspberry Pis and the like it should stay quite a low figure even with more devices connected. So, how much does it cost to run? Assuming the minimum power draw is 12W and that electricity costs ~$0.30/KWhr:
Weekly: 2.016KWhr; $0.60 Monthly: 8.064KWhr; $2.42 Annually: 104.832KWhr; $31.45All up it’s not a particularly expensive device to keep running. If you don’t need gigabit speeds this switch can be an excellent choice for getting a large number of devices onto the same network – 100Mbit is more than enough for browsing, light file sharing and streaming, printing, 100Mbit devices like Raspberry Pis and more.
If you’re in the market for a gigabit switch the HP Procurve line has probably come up in your searches. The 1410-16G is a 16-port gigabit switch, unmanaged, that is also fanless and comes with rack-mounting equipment. Oh, and it’s under $100 AU. With a lifetime warranty. That’s a lot of boxes ticked right there. If you’re used to HP’s 24/48-port rackmount switches the 1410-16G will probably seem quite compact. Meausuring approx. 21 x 11.2 x 4.5cm and weighing ~650gm, it’s certainly not hard to stash away out of sight if needed. The metal chassis helps both with durability and also heat dissipation – and it doesn’t hurt the feeling of quality, either. Jumping straight into the important parts – a closeup of the ports on the front: Nothing out of the ordinary here – two sets of 8 ports, cable clips facing outward as they should be. To the left there’s the indicator lights: Pretty self-explanatory there – and the LEDs are quite appropriately bright, easy to see but not lighting up the entire room. Flipping the unit around to look at the back: Pretty bare back there. A closeup of the main point of interest: Flipping the unit around to look at the (identical) sides, there’s once again not a great deal to see. Ventilation holes and mounting points for the rack ears. Speaking of rack ears: They come with all necessary screws and mounting gear. A nice touch – for a lot of home enthusiasts who have a rack 16 gigabit ports may suffice, and this will save a shelf/custom mounting brackets. There’s also wall-mounting hardware supplied: …and some nice self-adhesive rubbised feet: The external power brick is reasonably small with a standard 2-pin figure-eight cable going into it: A closeup of the printed info for anyone who cares: The unit is silent as you would expect from a fanless unit, and we couldn’t hear any audible hissing/other noises coming from the power brick. In use it’s extremely power efficient, pulling an average of 8W from the wall in use with 14W peak during power-on. It also doesn’t get appreciably hot during use. As far as performance goes, putting this switch between an iperf client and server showed a steady 945Mbit/s throughput – an excellent result. We weren’t able to test it in a situation where we pumped 16 or 32 gigabits/second through it, which should be where this switch really shines. If our experience with other Procurve switches is anything to go by, this one should be able to deal with very long periods of uptime without issue. We tested this one for three weeks with constant use and it remained trouble-free. Given the price point – at or below $100 delivered – the features of this switch make for a compelling product for anyone looking for an unmanaged gigabit switch with 16 ports. Well worth considering.
Intel’s network cards are popular due to their speed and reliability, which is often greater than the onboard chips in devices/motherboards. The Intel Gigabit CT Desktop Network Adapter is a PCI-E x1 add-in card with a single gigabit port, usually selling for around $30AU. It is low-profile and should come with a low-profile bracket – handy for thin HTPCs or servers – and is passively cooled as you would expect. It auto-negotiates – so you don’t need to worry about crossover cables – and is PCI-E v.1.1, which supplies more than enough bandwidth for a single gigabit port and should work fine in V2 and V3 slots. It is also supposed to be compatible with x1, x4, x8 and x16 slots. The network controller is Intel’s 82574L – a design released in 2008, with an expected discontinuance of 2018 – Intel certainly expect to get a lot of mileage out of that chip! The 82574L has a TDP of below a single watt, so this is going to be quite a power-efficient add-in card. Intel state that the typical power consumption is in the range of 1.9W for the entire card. Driver support is excellent across virtually all operating systems – it’s plug and play with many Linux distros and works perfectly well with the provided drivers in Windows machines. It also has support for teaming/bonding/link aggregation and 9K jumbo frames. Physically the card is 11.92cm long and 5.53cm wide. In our tests the card managed an impressive average of approx. 950Mbit/s – very close to the theoretical maximum throughput of a gigabit line. If you are in the market for a reliable, fast PCI-Express network card and only need a single port this card is well worth a look – between the features, low power usage, low profile option and driver support it’s an excellent buy for the price.
This one caused a bit of hassle recently – a few online guides don’t seem to work with the current version of Ubuntu. We found that this works, at least in the ~10 or so servers we have tried so far:
sudo apt-get install snmpdBack up your snmpd.conf file:
sudo mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.oldCreate a new file:
sudo touch /etc/snmp/snmpd.confEdit with your chosen editor and put in the following:
rocommunity public syslocation “Describe the server’s location” syscontact [email protected]Save and exit. Now edit the following file:
/etc/default/snmpdComment out the following line by putting a # before it:
SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -g snmp -I -smux -p /var/run/snmpd.pid’On the next blank line add the following:
SNMPDOPTS=’-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -c /etc/snmp/snmpd.conf’Save the file and restart the SNMP daemon:
sudo /etc/init.d/snmpd restartNow you should be able to successfully snmpwalk locally and from machines on the local network.
If you want to see how much traffic is passing through your network port there’s a handy tool called vnstat which will tally the amount of data passing through. You can install it with:
sudo apt-get install vnstatIt will usually add the databases and network ports automatically like so: If it doesn’t and gives you an error you can create the database(s) with:
sudo vnstat -u -i eth0If you have multiple network cards/ports you can add those in, too:
vnstat -u -i eth1 vnstat -u -i eth2 …etcIf it couldn’t create the databases you can start it with:
sudo /etc/init.d/vnstat startIf you need to change the maximum bandwidth from 100Mb you can edit the file:
/etc/vnstat.confScroll down until you see the following:
# maximum bandwidth (Mbit) for all interfaces, 0 = disable feature # (unless interface specific limit is given) MaxBandwidth 100and make MaxBandwidth the figure you require (e.g. 1000). If you make a change restart vnstat with:
/etc/init.d/vnstat restartYou can now see how much traffic has come through the NIC since vnstat started recording – at first it probably won’t be much (if any), but as it adds up you can check it with:
vnstatThe output should look like: You can watch how much traffic is flowing through in real-time by running:
vnstat -i eth0 -lThis will give you a screen showing you the current traffic: You can end this with CTRL+C, which shows you a summary screen: You can get an hourly summary with:
vnstat -i eth0 -hDaily summary with:
vnstat -i eth0 -dMonthly summary with:
vnstat -i eth0 -mThis is a really handy way of keeping track of your network traffic – whether it’s out of curiosity, wanting to know how much stress your network is under or looking for a bottleneck this can be quite a valuable tool.
Oh, and as a follow-up to yesterday – the default login and password for a Ubiquiti Edge Router Lite is:
ubnt ubntHope that helps – I know I’m guilty of a quick google for the login rather than opening a manual!
I know someone is going to ask me this in the future so I’m making this post now – the default IP address for the Ubiquiti Edge Router Lite is:
192.168.1.1For those of us who use 10.1.1.x etc. you’ll have to put a computer onto the 192.168.1.x range temporarily to change the router to suit your network.