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  • How to correctly set up iWARP? Preferably on loopback

    - by ajdecon
    iWARP is a protocol for doing remote direct memory access (RDMA) on top of TCP/IP, so that it can work with Ethernet and other network types as opposed to Infiniband. It works with many of the standard IB interfaces - the IB verbs, for example - so it's all pretty transparent. I'm doing some IB-verbs programming (mostly for the sake of learning about how they work better), and it'd be wonderfully convenient for me if I could use iWARP to do RDMA over my loopback interface, so that I could test some of my code without getting on our IB-connected cluster. :-) But I cannot figure out how to get a "local development environment" set up: there are no tutorials I'm aware of for even setting up iWARP from scratch on a server or a network interface. Can anyone give me a tutorial or point me in the right direction? Environment is Fedora 16 running in VirtualBox.

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  • Routing table change to access Internet over mifi

    - by Randall Blake
    I have two networks at home. One uses a Verizon mifi wireless on 192.168.1.1. The other uses a dlink router on 192.168.0.1. I have one laptop with two nics, one wireless and one not. The wireless nic connects to the mifi. The Ethernet nic connects to the dlink router. It's ip is 192.168.0.2. I also have a laptop with only one nic connected to the dlink on 192.168.0.3. I want to connect laptop 2 to the Internet. Can I do that by adding an entry to the routing table so that destination 0.0.0.0 routes to 192.168.0.2? If I do that, will laptop 1 "know" that it should route traffic from 192.168.0.3 to 192.168.1.1? Thanks for any assistance.

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  • How to prevent dial up networking connection window from coming up on Windows 7?

    - by Tom
    I have PPP over Ethernet connection at home, so I have a dial up connection set up which comes up every time when I log in, so I can connect to the net by clicking on it. This works fine, but now I got a router which does the connection automatically, so there is no need for the dial up networking connecting window to come up. Nevertheless it comes up everytime when I log in regardless of the living net connection already established by the router. It does not cause any error I only have to cancel the dialog, but it's a nuisance and I can't find any setting to make it stop. Of course, I could remove the networking connection altogether, but I'd rather keep it, so I don't have to create it again if sometimes I need to connect to the net directly without the router. Is there a way to stop the connection dialog from coming up without removing the networking connection?

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  • Methodologies for performance-testing a WAN link

    - by Chopper3
    We have a pair of new diversely-routed 1Gbps Ethernet links between locations about 200 miles apart. The 'client' is a new reasonably-powerful machine (HP DL380 G6, dual E56xx Xeons, 48GB DDR3, R1 pair of 300GB 10krpm SAS disks, W2K8R2-x64) and the 'server' is a decent enough machine too (HP BL460c G6, dual E55xx Xeons, 72GB, R1 pair of 146GB 10krpm SAS disks, dual-port Emulex 4Gbps FC HBA linked to dual Cisco MDS9509s then onto dedicated HP EVA 8400 with 128 x 450GB 15krpm FC disks, RHEL 5.3-x64). Using SFTP from the client we're only seeing about 40Kbps of throughput using large (2GB) files. We've performed server to 'other local server' tests and see around 500Mbps through the local switches (Cat 6509s), we're going to do the same on the client side but that's a day or so away. What other testing methods would you use to prove to the link providers that the problem is theirs?

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  • Where is debian storing its network settings?

    - by user13743
    I have a debian machine that is supposed to have a static ip, but insists on getting its address from the DHCP server. Here's this settings file: $> cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 iface eth0 inet static address 192.168.1.99 gateway 192.168.1.1 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 Yet $> sudo /etc/init.d/networking restart Reconfiguring network interfaces...done. $> sudo ifconfig eth0 Link encap:Ethernet HWaddr 00:e0:03:09:05:2e inet addr:192.168.1.205 Bcast:255.255.255.255 Mask:255.255.255.0 ... Where is it being told to use dhcp?

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  • GPO: Disable WiFi when computer is connected to LAN with wire

    - by r0ca
    Hi all! Is anyone of you know how to disable, thru a GPO, the Wireless connection as soon as the computer is connected to the LAN with a wire. By example, a user is at home with his laptop, connected to his home wifi connection. He leaves and comes to the office but the Wifi is still enabled. He plugs the ethernet cable in the computer and then, both wifi and wire connection are enable. I would like to apply a GPO that does this... Thanks a bunch!

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  • Detect an IP address of a Wireless Access Point device

    - by dempap
    I have a Wireless Access Point device (http://www.szedup.com/show.aspx?id=1706), which I am planning to put into BeagleBoard-xM, in order to achieve wireless communication (LAN). However, I can't find it's IP address. I mean, I have to know it's IP address in order to connect with BeagleBoard-xM via a terminal emulator. For the moment, I have this device connected via Ethernet on my router. My router's setting page shows I have this device connected, but no further information. Is there any way to find the IP address of the Wireless Access Point? I hope of being understood. Any help would be really appreciated.

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  • Significant OS X Finder lag when listing directories/files

    - by Jack Sleight
    I'm experiencing some significant OS X finder lag, that seems to be purely an issue with Finder itself, and not the HD or any other part of OS X (I'll explain below). The lag only appears to be when listing directories/files, where I'm seeing up to twelve or so seconds of lag (the folder opens with a blank list and the spinner going in the bottom right). This happens with both the local SSD and network drives (connected via ethernet or wifi) Browsing both local and network drives in terminal and listing directories is instant I can actually browse files on my NAS from my phone over a 3G connection from the other side of the country faster than Finder can when connected to the local network (madness!) Can anyone help? Thanks.

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  • IP Connflict on network

    - by PSU_Kardi
    I keep getting an IP conflict on my home network and can't figure out why. I'm running a Belkin-N wireless router that has an Ethernet connection to my 360 and a wireless connection running to my laptop. It's WPA2 encryption and I have a nice password on my router consisting of letters , numbers and special characters. But for some reason I keep getting IP conflicts at night time...By the time I look into the problem I don't see anyone else on the network. Is my router giving me false positives?

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  • what Windowx XP LAN driver for Asus F5Z

    - by Radek
    a friend of mine asked me to re-install his Asus F5Z notebook with Windows XP. I installed succcessfully all drivers from assus driver download site. Everything is working fine but ethernet driver. The installation of Lan Driver for WIN XP finishes with strange message "Please shutdown & plug Realtech PCI-e card to complete the installation. Not sure if it matters but OnChip SATA is in 'Native IDE' mode . The original one with Vista was 'IDE - AHCI mode'. Any idea how I can make the LAN adapter to work under Windows XP?

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  • Cannot assign port 4 to WAN on TP-Link WR740N by DD-WRT wiki

    - by Victor Sergienko
    I'm following the DD-WRT instruction to get TP-Link WR740N v3's Port 4 on a different VLAN, but this doesn't happen. First, I have no "Setup VLANs" settinngs tab in DD-WRT v24-sp2 (07/20/12) std r19519. I can get Internet on Wi-Fi if assigning eth1 to "WAN Port", but then all Ethernet ports get on the same VLAN and any wired connection grabs the DHCP address and Internet connection from router. When following the "old" instruction, if I run, say, nvram set vlan2ports="2 5*", should there appear a new interface, vlan2, in ifconfig, after ifconfig vlan2 up? It doesn't - does it mean there is no support for different VLANs in my software/hardware? What am I missing? Is it impossible to create more VLANs on TP-Link740?

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  • Apple file sharing: bind to a specific interface

    - by Cesar
    My customer have an office small office with just a wifi router. He use this router for internet connectivity and file transfer operations between the desktops. Recently the file transfer activity between desktop (all osx based) is increased a lot so he bought a switch (no connected to the router, too far away) for transfer the file over the cable instead over the wifi. Problem: How to bind the file sharing service just to the Ethernet interface and exclude the wifi interface ? (actually the service binds to the wifi automatically and there are no options about the interface binding)

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  • Can I set up a 2nd home wireless router, with router2 connecting to the internet through a desktop which is wirelessly connected to router1?

    - by gil b.
    Hi, I apologize for the crudeness of my MSPaint drawing, but please view my diagram of what I'd like to accomplish: Proposed home network architecture Currently, all devices are connected to 1 wireless router. I would like to make my own subnet, with a box in-between my subnet and the shared wireless router, so that I can learn about IDS, traffic analysis, etc. I was also given a cisco PIX firewall to play around with, and it'd be an added bonus if I could incorporate that into my network. The reason for this proposed architecture is so that I can monitor all MY traffic, without seeing anything going on with my roommates' traffic. my MAIN Question is, is it possible to have my desktop connect to the wireless router with internet via wireless card AND share that connection via the ethernet card, hooked to wireless router 2? cable modem - wireless router - desktop pc connected wirelessly - wireless router 2 getting internet from wired connection to desktop pc - laptops connected wirelessly The PIX can be left out for now, but I'm wondering if it could eventually be incorporated? THANKS!

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  • Maximum MTU size

    - by user192702
    Thought one of the issues I'm experiencing with the following question is due to MTU rightfully so. ESXi 5 VM Putty session hangs, vSphere client timing out However, when I tried testing the maximum MTU size it seems there's just no limit. Thought Ethernet only allows maximum MTU. But I'm up to 54450. ping -l 54450 192.168.10.7 Pinging 192.168.50.7 with 54450 bytes of data: Reply from 192.168.10.7: bytes=54450 time=1081ms TTL=62 Reply from 192.168.10.7: bytes=54450 time=1079ms TTL=62 Reply from 192.168.10.7: bytes=54450 time=1079ms TTL=62 Reply from 192.168.10.7: bytes=54450 time=1079ms TTL=62 Ping statistics for 192.168.10.7: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 1079ms, Maximum = 1081ms, Average = 1079ms

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  • Home Media Streaming Server

    - by sharjeel
    I'm looking for a Home Media Server which can stream videos to various devices including iPhone, iPad, Windows Machines, Android etc. I wouldn't want to install any client on any device; a web interface will be preferred. Also, it should be able to read videos of as many formats as possible and should stream by transcoding the resolution and format according to device's specifications. I have a fairly powerful machine on which I'm free to install Windows 7 or Linux. The streaming will be done over a g/n WiFi router or Ethernet locally. What is the suggested solution in my case?

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  • What's the fastest way to store/access large files?

    - by philfreo
    I do a lot of video editing on my Mac and need a way to store very large (30 GB) files, and don't have room on my HD. A USB/Firewire external hard drive would work, but it seems way too slow for consistently working with such large files. I've also considered buying another computer, with a large hard drive, and putting it on the same network with a shared folder. What's the fastest / most efficient way to do this? Please consider USB 2.0 speeds, hard drive read times, ethernet speeds, etc. Are there other options I should consider?

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  • how to change interface ip in ifconfig with /etc/network/interfaces

    - by user2478348
    Hi everybody when modifiying /etc/network/interfaces, saving it and then executing ifconfig i can't see the modification i made..for example here is part of my /etc/network/interfaces: auto wlan1 iface wlan1 inet static address 192.168.0.60 netmask 255.255.255.0 gateway 192.168.0.61 you can see that the IP address of my wlan1 is 192.168.0.60 but when typing ifconfig i have this: wlan1 Link encap:Ethernet HWaddr 00:19:70:0f:c2:9c inet adr:192.168.0.1 Bcast:192.168.0.255 Masque:255.255.255.0 adr inet6: fe80::219:70ff:fe0f:c29c/64 Scope:Lien UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 Packets reçus:758 erreurs:0 :0 overruns:0 frame:0 TX packets:610 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 lg file transmission:1000 Octets reçus:73490 (73.4 KB) Octets transmis:127883 (127.8 KB) (the inet adr:192.168.0.1 and not 198.168.0.60)..if someone can help me I'll be very thankful :)

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  • Network connection keeps dropping - bad hardware?

    - by Bill Sambrone
    Hello all, I've into a bit of a wall with a client of mine. In an office of 20 people, he is the only one who experiences broken connections to his mapped network drives. I have everyone set up with about 6 mapped drives, all pointing to the same server (no DFS), and everyone else can access them lightning fast. The environment consists of a mix of Windows 7 and XP machines, all 32-bit. The server holding the data everyone is mapping to is running on Server 2008 R2, and is a domain controller. We recently swapped out their old 10/100 switch for a shiny new Dell PowerConnect gigabit switch. We have also replaced an old dying Sonicwall with a shiny new one. Everything is running on an ESX host except for the DC, where everyone is getting data from. In my client's office, we have done the following: Swapped out his computer (Win7 and XP box) Swapped out the desktop switch in his office Removed the desktop switch in his office Changed out the network cable going to the wall Ran 'net config server /autodisconnect:-1' on the server Disabled remote differential compression on his current Win7 box When we swapped out his network cable, everything seemed fine for about 4 days. Normally I would get a phone call a couple times per day letting me know that Outlook has crashed (there is a 9GB PST living on the server he is always connected to), or that his software he is running from his L drive has crashed. I almost thought I had this solved, but after we rebooted the DC the other night he all of a sudden couldn't stay connected to his mapped network drives for more than 10 minutes. When I ran 'net use' from the command prompt, it listed all the network drives where were randomly in a state of 'OK', 'Disconnected', or 'Reconnecting'. What else should I try? Maybe there is bad wiring in the wall, patch panel, or a bad port in the new switch I have in the server room?

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  • Changing Internet connection on ISA Server 2000

    - by garyb32234234
    Hi We are getting a new internet connection installed and will need to unplug the old one and connect this to our ISA Server 2000. Will this be a simple swap out job? We will be given a new ip, which i know i will have to enter into the external network card TCP/IP page. I will also be given the default gateway to enter. The ISP engineer said we may have to reset the ARP? cache, if we dont know how we will have to reset the ISA server? Has anyone any experience? The current connection is with the same ISP but it was owned by the business park were we are located and they linked up an ethernet port to what i assume is their own router. Hope you can help, i know that ISA 2000 is somewhat less easy to use than the newer versions.

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  • Find slow network nodes between two data centers

    - by 2called-chaos
    I've got a problem with syncing big amount of data between two data centers. Both machines have got a gigabit connection and are not fully occupied but the fastest that I am able to get is something between 6 and 10 Mbit = not acceptable! Yesterday I made some traceroute which indicates huge load on a LEVEL3 router but the problem exists for weeks now and the high response time is gone (20ms instead of 300ms). How can I trace this to find the actual slow node? Thought about a traceroute with bigger packages but will this work? In addition this problem might not be related to one of our servers as there are much higher transmission rates to other servers or clients. Actually office = server is faster than server <= server! Any idea is appreciated ;) Update We actually use rsync over ssh to copy the files. As encryption tends to have more bottlenecks I tried a HTTP request but unfortunately it is just as slow. We have a SLA with one of the data centers. They said they already tried to change the routing because they say this is related to a cheap network where the traffic gets routed through. It is true that it will route through a "cheapnet" but only the other way around. Our direction goes through LEVEL3 and the other way goes through lambdanet (which they said is not a good network). If I got it right (I'm a network intermediate) they simulated a longer path to force routing through LEVEL3 and they announce LEVEL3 in the AS path. I basically want to know if they're right or they're just trying to abdicate their responsibility. The thing is that the problem exists in both directions (while different routes), so I think it is in the responsibility of our hoster. And honestly, I don't believe that there is a DC2DC connection which only can handle 600kb/s - 1,5 MB/s for weeks! The question is how to detect WHERE this bottleneck is

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  • Could a computer act (dependably) as a wireless router for 200+ clients? [closed]

    - by awkwardusername
    That is, I have a Core 2 Duo E7500 at 2.93GHz, with 2GB memory. I plan to install either Windows Server 2012 or Zeroshell 2.0RC1, and it also (planning to) includes two PCIe Wireless Card Adapters. It also has one ethernet port, and I will connect that to another machine which will be a Database and a Web Server. My plan is to have a corporate level wireless intranet with 200+ clients. I cannot afford to buy routers because I want to operate at zero costs as possible, utilizing my available resources. Is that plan plausible? Also, what minimum specs should my wireless card have? @SvenW: Oh, I meant corporate on the deployment level. I am still an undergraduate and this is more of an educational and expiremental work than an actual project. I got Windows Server 2012 for free though, and this isn't actually for commercial use.

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  • Disconnected from WiFi, Windows claims otherwise [closed]

    - by Manu
    I'm connected via wifi to my ISP's router/modem. While Windows says that I'm always connected, I keep getting messages from Netgear Genie that I've lost contact to the Internet, and I cannot access webpages until it comes back. There are two other computers in the house, one connected to the router via ethernet, the other via wifi, both seem to have no such problems. I've wondered if Netgear genie itself was the problem, but I am regularly disconnected even if I uninstall it. And I'd rather have it since it accurently tells me if I'm connected or not. Why does windows says I'm online if I can't access any online game, or website ? I've removed the connection, recreated it, I've even copied the settings to a usb key from the computer that has wifi access. Is there a tool that can tell me which program, if any, is disconecting me ?

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  • How do I SCP/FTP to a Coraid SR2421

    - by Pitto
    I need to save data to a Coraid SR2421. I am no expert and I'm trying to understand how this costy piece of hardware works. All I have is a Ethernet cable connecting my laptop and the coraid to a switch and the coraid's console with cursor blinking. Any kind of help would be greatly appreciated. edit and further explanation: I've tried using software on the coraid website but It's not working. So I've contacted the support and they sent me a file to upload on the coraid. It looks like if I upgrade coraid's firmware then I'll be able to use the coraid software on the windows side. That's why I'd need SCP/FTP or any kind of solution to copy a file in the partition that can be read from coraid console command line so I can launch the update command as requested. I hope I was a bit clearer now.

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  • External Storage for 2TB of backups and 4TB of data RAID level? HW vs Software?

    - by Jerry Mayers
    I have a Mac Mini set up as a media center/file server. Currently I just have a hodgepodge mess of external drives for storage. I'm maxed out, and I have some new laptops on the way with much larger drives and I need to work out a good storage solution for backing them up, as well as storing media on the server. I need around 2 TB of storage for the time machine backups from my various systems and around 2 TB more for media. I would like to build this to handle around 6 TB total so I have some growing room. Since I'm using a Mac Mini as the server I need to use external enclosure(s) that support USB 2 or Firewire 800 (preferred) or gigabit Ethernet. Performance of the system isn't a huge concern since the majority of the access from other computers is done over 802.11N. I plan on using 2TB drives, for the final version, but initially I'll try and use my existing 2 (1TB) drives + some new 2TB drives, and swap the 1TB ones out as I fill up. As to the actual questions: Should I use hardware RAID in some enclosure? Because if the enclosure dies I have to find an identical one to get to my data right? Wouldn't a software RAID be better as I can use any method of connecting the drives to the system? Remember OS X server is my OS. What if I had to reinstall OS X, can I restore the software RAID easily? What RAID version should I use? For the 2TB used for the time machine disk I don't see why I need RAID here, just a single 2TB drive since its already the backup, but for the remaining 4TB it would be the only copy of the data so I should build some redundancy. I had a RAID 5 setup using a cheep RAID PCI card years ago running RAID 5 in a 2 TB array and when a drive died it wanted 48 hours to rebuild. Is this crazy slow for a setup of this size or is this to be expected? Any suggestions as to drive enclosures?

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  • One NIC going to sleep on Centos system

    - by sbleon
    I have two Dell boxes with two ethernet ports a piece. I have a cable directly connecting two of these ports, creating a tiny LAN with 10.3.3.x addresses. The other port on each box is hooked up to a switch and has a DHCP-supplied address to talk to the outside world. I've noticed that when scp'ing large files from one box to the other over the private LAN, the transfers sometimes stall. It appears that any other network activity on either box will cause the transfer to resume. Wake-on-LAN is disabled on all interfaces according to ethtool. What else could be causing these stalled transfers?

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