I was wondering how to install the Link Layer Topology on CentOS 5. I have installed the lld2d daemon from a Debian how to after compiling it. It seems to be running but it is not talking to the Windows 7 network mapping.
View 2 RepliesI'm looking for a way (kernel patches, configuration, etc) to bond multiple network interfaces together but for limited purposes. Here's the setup. Machines A, B, C, and D each have 4 NICs, each of which are on separate unmanaged switches. The connections are made in a corresponding way. e.g. eth0 of each machine are connected via switch 0, eth1 are connected via switch 1, etc. There are also other machines which have only one NIC and are connected to switch 0 only. All NICs for A/B/C/D and the switches are gigabit speed. The remaining machines have a low traffic level. Machines A/B/C/D need the extended bandwidth. And this bandwidth need usually involves only one connection at a time.
E.g. machine A transferring files to machine C with no other traffic going on. The speed need is to cut the transfer times from several hours to few hours (such as 8 hours to 2 hours). Transfers of up to a few terabytes at a time are involved. IEEE 802.1AX won't accomplish this. It requires special support from a single switch that all connection go to (raising costs and reducing reliability). Also, from technical details of 802.1AX, it appears that a decision process is made for which traffic goes over which physical link based on destination information. It's unclear what impact this will have, but it looks like at least a single TCP connection cannot use all physical links.
And possibly all traffic from host A to host B is limited to a physical link (not any better than a round robin of crossover cables). What I am looking for is something that works entirely on an end-to-end basis within a LAN. If it works at the link layer, that could be OK as long as it doesn't have the limitations of 802.1AX. Working at the IP layer would be OK, too (as I can already envision the logic of how to make that work). This might be an experimental patch to the Linux kernel if anyone has tried it. I have not dug into kernel source to see what might be in there, yet, but will eventually do that if there isn't a patch already available.
We run redundant switches that two nic's on each server connect to. We also run bonding on our servers. Because we have two switches, we can't run lacp or anything. If a switch goes into a crashed state where it doesn't pass traffic but still provides link, bonding thinks the interface is still up and thus will still send traffic through it. Does anybody know a better way to configure the fail over of the interface? This would be a similar situation to somebody using a media converter.
View 1 Replies View RelatedI'm trying to install DFE-550TX , network device of D-LINK, with no success. I'm using CentOS 5.6.
View 1 Replies View Relatedim trying to send pages of 4096 bytes from kernel layer of server to kernel layer of client over a network. previously i tried the foll. code , for data less than a 100 bytes it worked fine , but for something larger than that the computer hangs......(even the dmesg's wont say why) i also wanted to know how we could use the 'sendpage' function to solve this problem.
Code:
CLIENT'S KERNEL MODULE
struct iovec iov;
char buf[1024];
[code].....
Is there a program that I can install that will display a visual/graphical representation of the local Network Topology?
View 2 Replies View Relatedi need a topology generator in which all the parameters for the topology should be got and the network should be generated for sensor networks
View 2 Replies View RelatedK3B says that my drive supports DVD-R DL writing. K3B shows it only having 1 layer.dvd+rw-mediainfo shows
Code:
INQUIRY: [ATAPI ][DVD A DH16A6S ][YA16]
GET [CURRENT] CONFIGURATION:
[code]...
how to vary energy levels in gensen topology generator?seed parameter means?
View 2 Replies View RelatedSo I recently purchased a VPS and had CentOS strongly recommended by a friend for my servers OS. I have a server, and one IP.
My /etc/resolv.conf reads...
nameserver 203.98.68.110
nameserver 203.98.68.210
link for instructions for full cd/dvd install?
View 2 Replies View RelatedI'm running a Poweredge 4400 with a 3com card and an intel card covered under e100.
I'm using centos 5.5 in its default server config coming from gentoo.
I have no link on either of the two interfaces, ever. The card initialises with ADDRCONF(NETDEV_UP): eth0: link is not ready and then falls back to half duplex but still with no connection.
I have manipulated most of the general settings that can be changed with ethtool.
Set to manual configuration with 100/full duplex
The cards are recognized alone and together. I have setup static interfaces with no problems. The ping to the local interface such that:
nic = 192.168.1.10
ping 192.168.1.10
we get back route times and all is well
ping 192.168.1.1
no route...
I have tried several different cables verified good other connections. I have verified the ports I am connecting to work correctly. I have manually shut down the onboard nic (in bios) and tried the 3com card alone. I have tried pci=routeirq, thinking there might be an irq issue.
If this was just the one card, I would install another and move on, but both nics are acting in exactly the same way.
For connect myself to Internet I use the wireless because I don't have the LAN cables connection at home....so I use a Wireless Cardbus Adapter. The wireless cardbus that I use is an D-Link AirPlus ExtremeG+ DWL-G650+ Can I use wireless or I'll remain isolated from the Internet? Where I can find the file for install and make run it?
View 2 Replies View RelatedI have a problem. I want interface to shut down once there is a link down state detected. If you set up eth0, and then plug cable out, eth0 stays up, just loosing the RUNNING flag. I want it to go down completely.
I've stumbled upon netplugd, and I've tried using it. It is a daemon that detects states in (link up) and out (link down) from kernel netlink interface. If I have this daemon up, it detects that link is down (eg. cable removed from interface), and it runs correctly /etc/netplug.d/netplug eth0 out. That script then runs ifdown eth0. And that's ok.
But very next moment netplugd runs /etc/netplug.d/netplug eth0 probe, and probe section of that script runs "ip link set eth0 up", which then turns interface back on!I've tried commenting out that line, but then new problem occurs - after the link is up, netplug cannot figure that out and bring back interface. Has anyone have this kind of problem, and any viable solution with netplug?
i'm currently having trouble installing my D-Link DU-562M USB Modem in Centos 5.3. That is, my modem is not detected. When i issue the command ls /dev/tty*, i can't see any node pertaining to /dev/ttyUSB0 or more.. what should i do to make my modem work?
View 17 Replies View Relatedwhat I need is : 1/ make run the wifi USB card D-Link DWA-110
2/ I saw I had problems with yum: when I launch the "add/remove programs" button in the menu, if the "c5-media" item is checked (and only this one) and the DVD of centOS is in the drive, then I have this message : "cannot retrieve repository metadata (repomd.xml) for repository: c5-media. Please verify its path and try again" I specify I modified the /var/run/yum.pid file (removed the only number which was here)
the main issue for me is the yum failure, because it could be needed for the wifi problem. one thing after the other! the installation is totally new (except that I modified the yum.pid file).
Having some troubles with NEC AD5170A device - it can`t read any dual layer disks. First layer reading is ok, but when drive switching to second layer it stops and don`t read any data from disk. Media - licensed DVD video disks. Same drive in windows read everything. I try to update firmware, but it doesn`t.
[Code]....
I have a problem where I'm using Ubuntu linux to mount a Windows Vista machine's USB drive and access it on the web using Apache. I did have the USB drive plugged into the Linux machine directly and that was working via the web. FollowSymLinks is on in httpd.conf
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The mount works and I can see the files (see above) from my regular linux user account. If I make a test file in /mnt and soft link to that, I can see it on the web. So it's just the mount to the vista machine that seems to be a problem. It's supposed to be a simple read-only mount and the apache login should (I think) be able to see the same generic root access permissions.
log from apache: [Mon Apr 26 20:39:42 2010] [error] [client 99.99.99.99] Symbolic link not allowed or link target not accessible: /home/user1/pub_html/Music, referer: https://xx.xx.xx/~user1/music.html
The credentials have a login and password that matches a special read-only account on Vista. I can see the files on the system from Linux, but not via the web. As mentioned above, a different link to the same /mnt area works fine via the web. I've tried several different mount options with no success.
I need to know that how should I install my usb Wireless adaptor , it's a tplink tl-wn422g v 2 , is there any way to install it ?
View 3 Replies View RelatedI am trying to find out how I can estimate the IP Layer bitrate I would get from an ethernet link? Say at 100 Mbits/s or 200 Mbits/s (powerline)? Is there a formula that I could use to calculate that?
View 2 Replies View RelatedI have a desktop that has a d-link DWL-520 wireless card, which was working under Windoze. Today I installed Centos 5.4 on the system , which went cleanly. I then used Network Configuration to set up the wireless card. I specified to use DHCP, set the SSID and authentication password. When I tried to activate the card I get these error messages
Error for wireless request "Set Mode" (8B06): SET failed on device wlan0 ; Operation not supported. Error for wireless request "Set Encode" (8B2A): SET failed on device wlan0 ; Invalid argument. Error for wireless request "Set Encode" (8B2A): SET failed on device wlan0 ; Invalid argument. Determining IP information for wlan0.
The hardware manager seems to have correctly identified the card and chipset, (Intersil Prism 2.5) and installed driver hostap_pci which came with the distro. This web site seems to suggest that this is the correct driver: [URL] searching forums I've found a few references to these errors, but they were from several years ago, and for different distros and cards. I did find a reference to using Network Manager to configure the card instead of Network Configuration. I started the NM service and configured a connection using it instead, but still no luck.
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I want to install the DLink N150 (DWA-125) Wireless USB adapter in Ubuntu 9.04 if if go to
system-> administrator->log file viewer->dmesg
[ 8.840794] type=1505 audit(1286918554.305:2): operation="profile_load" name="/usr/share/gdm/guest-session/Xsession" name2="default" pid=2041
[code].....
i don't know how to enable wireless.
I want to write a new protocol on transport layer. These are the features that new protocol should include:
-Real time
-Concurrent transfer
-Multipath and Multihoming
the reason why i should write this protocol is in order to transport encoded video stream over 3G link. When i investigated TCP UDP or SCTP source codes, i couldnot understand them at all. What ı want is to help me about steps of the protocol writing or guideline about it. How should i start, is there any book or source about it (i couldnot find over my internet research).
how to install D-link dwm-152 (3G/HSDPA) usb adapter on Lucid Lynx?
i've run lsusb and the result are:
Bus 005 Device 002: ID 0a5c:2162 Broadcom Corp.
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
[Code]......
Can both token ring and ethernet be connected to same switch? If we can connect so, how can a switch able to differentiate them.
View 1 Replies View RelatedOur ISP provides us with Layer 2 hardware (Modem?/Switch? (Hatteras)) for our leased line and internet access. I have been told that I should set up a VLAN capable router to separate the internet traffic from the internal traffic. I found that linux is capable of VLAN routing. Nice!
I have setup opensuse 10.3 put in two NICs and did the following
vconfig add eth0 10
vconfig add eth0 20
ifconfig public.ip.add.ress netmask 255.255.255.252 eth0.10 up
ifconfig 192.168.0.1 netmask 255.255.255.0 eth0.20 up
Plugged this NIC into the HATTERAS hardware (with a straight cable), and thought that this way I should be able to ping the public gateway or any ip out on the internet. My ISP is telling me that I should create a VLAN trunk to be able to 'use the internet', but as I understand in linux if I create any number of VLANs on one NIC they are already trunked. I also got the info, that the traffic is tagged, and I can separate the traffic reading the tags. I already read that some NICs are not able to VLAN because they are not able to handle the increased packet size.
Also that the MTU setting is important (dono' the exact value though, only that its important). I thought that a linux machine can act as a router and firewall in such a case, because proprietary switches/routers use linux as embedded os. This is my first meeting with VLAN so if this whole post does not make any sense or you think that I just need to RTFM more then tell me! I also have some (3) Dlink 3226 Layer2 switches around, but I think it would be waste to use a 24 port switch on this subject.
Have been using Ubuntu Desktop Amd64 for 6months, on a dual boot alongside Vista64. Since first installing the OS, I have switched over to Ubuntu & use Windows only for heavy multimedia edition & the occasional gaming.I just bought a netbook and installed Ubuntu 10.04 LTS NBR. Works great, except for wlan. No propriety drivers available for my Intel Wifi Link 1000BGN.
I've spent hours trying to install iwlwifi, but the process is somewhat complicted for a noob such as myself.After much reading and trying, I've managed to download and install iwlwifi-1000-ucode-128.50.3.1.tgz, (following the http://intellinuxwireless.org/?p=iwl...=howto-iwlwifi instructions)and am now working on installing the mac80211 subsystem (following the http://intellinuxwireless.org/?p=mac...howto-mac80211 instructions)When running
Code:
% wget
intellinuxwireless.org/mac80211/downloads/mac80211-10.0.4.tgz[/url]
[code]....
I have a dual boot on my computer - with ubuntu 9.04 jaunty jackalope on one side of the partition, and windows 2000 on the other. I recently bought - and had installed - a new ethernet card: TP-LINK network adapter TF-3239DL. It works perfectly on windows, but not on linux. I understand that the problem is that I need to install the linux driver, which I have available (comes in the CD), but I don't really understand how I am supposed to proceed. The instructions are very unclear to me, and I have relatively little experience.
View 9 Replies View Relatedi try to install my d-link dwl-g520 h/w:A1 in master mode with madwifi drivers but:
$ lshw
*-network:1
description: Wireless interface
product: Atheros AR5001X+ Wireless Network Adapter
vendor: Atheros Communications Inc.
physical id: 5
bus info: pci@0000:00:05.0
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I downloaded GENSEN topology generator i got everything as .cc and .h files but i dnt know how to run GENSEN topology generator in NS2..?
View 1 Replies View Related