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  • Add 802.11n to existing 802.11g environment

    - by Andrew Robinson
    I have a small home network that is currently running 802.11g. Two computers that are capable of 802.11n and two devices (a BlackBerry and a Skype phone) that are limited to 802.11g. I have a few neighbors running 802.11g but their signals are very weak. How big an impact will the two G devices have on N speeds? Will they pull the whole network back down to G? These two devices are hardly ever used where as the other N devices are heavily used. If I add an N router to the network (instead of replacing the G) and set my existing G router to use channel 1 with 20MHz bandwidth and then set the N router to use 6 & 11 for 40MHz will I eliminate the overlap and allow for full speed on both networks?

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  • Network and Storage Devices Throughput Chart

    - by zroiy
    With all of the different storage and network devices that surround our day to day life, understanding these devices data transfer speeds can be somewhat confusing. Think about trying to identify your weakest link in the a chain that starts with an external USB hard drive (or a flash drive) that's connected to a 802.11g wifi router, can you quickly come up with an answer of where's the bottle neck in that chain , is it the router or the storage devices ? . Well, the following chart should give you an idea understanding different devices, protocols and interfaces maximum throughput speeds. Though these numbers can fluctuate (mostly for worse, but sometimes for the better) due to different kind of factors such as OS overhead (or caching and optimization) , multiple users or processes and so on , the chart can still serve to provide basic information on the theoretical throughput different devices and protocols can get to.. Enjoy.  Link to the full size chart   References:http://en.wikipedia.org/wiki/Sata#SATA_revision_1.0_.28SATA_1.5_Gbit.2Fs.29http://en.wikipedia.org/wiki/Usbhttp://en.wikipedia.org/wiki/Usb_3http://en.wikipedia.org/wiki/802.11http://mashable.com/2011/09/21/fastest-download-speeds-infographic/http://en.wikipedia.org/wiki/Thunderbolt_(interface)http://www.computerworld.com/s/article/9220434/Thunderbolt_vs._SuperSpeed_USB_3.0  Icons:http://openiconlibrary.sourceforge.net/gallery2/?./Icons/devices/drive-harddisk-3.png      

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  • Improving abysmal 802.11n wireless network

    - by concept
    I am in desperate need of help to improve the abysmal performance of my 802.11n wireless network. At best I get 30Mbs (this is an internet download) from a technology that boasts 300Mbs, even worse is the LAN where to date best i have ever gotten is 1Mbs. It is literally quicker to copy the file to a USB and walk it to the other computer. Infrastructure is this AP 802.11n only broadcasting at both 2.4GHz and 5GHz Mac with 802.11a/b/g/n card is connected to the AP via 5GHz Linux with 802.11a/b/g/n card is connected to AP via 2.4GHz I have conducted the following tests (results at end of post) Internet based speed test wired and wireless LAN file copy wired and wireless I have read: http://nutsaboutnets.com/troubleshooting-wi-fi-problems/ http://www.smallnetbuilder.com/wireless/wireless-basics/30664-5-ways-to-fix-slow-80211n-- speed http colon //www.wi-fiplanet dot com/tutorials/7-tips-to-increase-wi-fi-performance.html Slow file transfer on network between two 802.11n laptops (connected directly together via access point) Wireless Network Performance Issues Slower than expected 802.11n wireless network speeds I have made the following optimizations AP broadcasts only 802.11n on both 2.4GHz and 5GHz frequencies 2.4GHz is on a channel with least interference (live in an apartment with lots of APs), this did make a 10Mb/sec improvement Our AP is the only one transmitting on the 5GHz freq. Security: WPA Personal WPA2 AES encryption Bandwidth: 20MHz / 40MHz (i assume this to be channel bonding) I have tried the following with 0 improvement Dropped the Fragment Threshold to 512 Dropped the Request To Send (RTS) Threshold to 512 and 1 Even thought of buying a frequency spectrum analyzer, until i saw the cost of them!!! Speed test results Linux Wired: DOWNLOAD 128.40Mb/s UPLOAD 10.62Mb/s www dot speedtest dot net/my-result/2948381853 Mac Wired: DOWNLOAD 118.02Mb/s UPLOAD 10.56Mb/s www dot speedtest dot net/my-result/2948384406 Linux Wireless: DOWNLOAD 23.99Mb/s UPLOAD 10.31Mb/s www.speedtest dot net/my-result/2948394990 Mac Wireless: DOWNLOAD 22.55Mb/s UPLOAD 10.36Mb/s www.speedtest dot net/my-result/2948396489 LAN NFS 53,345,087 bytes (51Mb) file Linux Mac NFS Wired: 65.6959 Mb/sec Linux Mac NFS Wireless: .9443 Mb/sec All help is appreciated, even testing methods will be accepted.

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  • Switches with 802.1x "supplicant timeout" feature?

    - by chris
    I'm looking for a complete list of switches which will allow 802.1x and normal (non-supplicant) enabled hosts to connect to the same ports on a switch. This is useful for areas where there are semi-open ports such as a lobby area or a library where corporate and guest users may use the same ports but you want them to have different access profiles and where it isn't expected that guests would have 802.1x configured on their system. For instance, Enterasys and Extreme Networks both have a feature where if the switch doesn't see an EAPOL packet from the client in a certain amount of time, it puts the port into a "guest" VLAN; if it sees an 802.1x supplicant, it tries to authenticate the user via 802.1x and if they succeed, it does what the radius server tells it to do with that port (IE put the port into a certain VLAN, apply certain ACLs, etc) Do other vendors have this sort of feature, or is it expected that a switch will do both 802.1x and MAC authentication, and the "supplicant timeout" feature is implemented with a blanket allow on the MAC authentication?

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  • Does HP 8530w support Wifi 802.11n?

    - by FoxyBOA
    According to vendor site HP 8530w supports 802.11n draft mode. My Windows 7 tell me that network card is 5100 ABG and know nothing about N mode (guys from Intel forum mentioned, that 802.11N versions must ended with N letter, e.g. 5100 ABN). Not sure if it matter, but my laptop model id is #FU462EA. How could I check that my Wifi card compliant with 802.11n (I suspect that "draft N" could have two "special" meaning: doesn't work with 802.11n at all or requires special activation of the mode). Any hints are welcome.

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  • Should I enabled 802.3x hardware flow control?

    - by Stu Thompson
    What is the conventional wisdom regarding 802.3x flow control? I'm setting up a network at a new colo and am wondering if I should be enabling it or not. My oh-cool-a-bright-and-shiny-new-toy self wants to enable it, but this seems like one of those decisions that could blow up in my face later on. My network: An HP ProCurve 2510G-24 switch A pair of Debian 5 HP DL380 G5's with built-in NC373i 2-port NIC LACP'd as one link. 9000 jumbo frames enabled. (Application) A pair of hand-built Ubuntu server with 4-port Intel Pro/1000 LACP'd as one link. 9000 jumbo frames enabled. (NAS) A few other servers with with single 1Gbps ports, but one with 100Mbps. Most of this kit is 802.3x. I've been enabling it as I go along, and am about to test the network. But as my 'go live' day nears, I am worried about the 802.3x decision as I've never explicitly used it before. Also, I've read some 10-year old articles out there on the Intertubes that warn against using flow control. Should I be enabling 802.3x hardware flow control?

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  • PXE in an 802.1X environment

    - by newmanth
    My organization is about to implement 802.1X on our enterprise, but we currently use PXE-based OS deployment sequences in SCCM. I'm looking for a way to continue using PXE in an 802.1X environment. Our infrastructure uses Cisco network gear running at 12.2 (or newer). We are an all Windows network and all clients support 802.1X. All new workstations have Intel AMT available (but not factory configured). In a worst case scenario, we'll use a guest vlan for OSD, but I'd rather have the OSD occur in an authenticated session. I've seen white papers that describe using AMT to act as a supplicant for PXE boot, but can't find any implementation details...

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  • 802.11n Audio Interference

    - by colithium
    Symptoms My audio is riddled with pops/crackles/glitches. Sometimes I swear the glitches sound exactly like the facebook messenger sound (best comparison I can give). Cause Using DPC Latency Checker, it reports the latency to be an abysmal 17,500µs (0.0175s). The first thing I did was disable my 802.11n wireless adapter. This immediately dropped the latency to a nice 250µs. When I re-enabled the adapter, it jumped right back up. I'm 99% certain that this is the cause of my audio glitches. Solution What can I do about it besides using wired Ethernet or buying a whole new adapter? My adapter is a Dell Wireless 1505 Draft 802.11n WLAN Mini-Card. To be honest, I've had nothing but trouble with the 802.11n standard and am contemplating just going back to g.

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  • 802.11N Windows XP Clients Unable to See Each Other

    - by zippy_raggle
    I am attempting to update my wireless network from 802.11g to 802.11n. When connected to the 'G' access point, the client laptops (there are 7 running Windows XP) are able to connect and browse the network for each other. When I connect them to the 'N' access point they can see the access point, but not the rest of the network. I tried swapping out the access point with a wireless router, but this did not change anything. I verified in both the AP and the router that isolation was turned off. Searching the web has not turned up any other ideas. The manuals don't show anything either. Why can't my wireless client nodes see each other on the 'N' network?

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  • Windows 7 / Windows Vista won't connect to 802.1x RADIUS Server

    - by Calvin Froedge
    I've deployed Radius and have no problems connecting with TTLS, PEAP, or MD5 using linux, mac, and windows xp. For Windows 7 and Vista, I'm never prompted with the dialog box to enter username & password after configuring 802.1x support on the client. Steps taken: Enabled Wired Autoconfig in services.msc Set to use PEAP Set to require user authentication When I enable the network connection it says "Trying to authenticate" then fails with no error log / message given. The radius server gives no indication that there was ever a request (no Access-Reject - the client simply never tries to authenticate). On the windows 7 client, I can see that the DHCP server does not assign an IP to the client when 802.1x is enabled on the client (though it does when it isn't). How can I debug this further? Has anyone else run into a similar situation? My radius server is freeradius on Ubuntu 11.10.

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  • Vista Enterprise doesn't find logon servers in a network with 802.1x authentication

    - by jneves
    In a network with 802.1x configuration and a samba server configured in the domain, I have a radius server that delegates the authentication against the samba domain for users (using LDAP). The radius defines which VLAN the user is supposed to have access. I'm trying to put a Windows Vista Enterprise in the same network, but it attempts to logon the domain before authenticating against the network in 802.1x and it doesn't find any logon servers. In the radius logs I see the machine trying to authenticate with 'host/'. Does Vista enterprise require that I put it in a network with access to the logon server at that point? Thanks in advance, João Miguel Neves

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  • Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

    - by Javier
    I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are 'untagged' and belong to a single VLAN, except for the ports used to join together the switches (in a star topology), these ports belong to all VLANs and use 802.1Q tags. So far, it works really well. But on this new switch (a Dell PowerConnect 5448), the settings are very different (and confusing). I have configured the same VLANs, an the uplink ports are set in 'general' mode (supposed to be fully 802.1Q compliant), I can set the VLAN membership as 'T' on these ports for all VLANs except VLAN 1. It always stay as 'U' on VLAN 1. Any ideas?

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  • Set 802.1Q tagged port on VLAN1 on Dell PowerConnect switch

    - by Javier
    I'm having big troubles when adding this Dell switch to my network. Here we use several VLANs to segment traffic. All switches (3com and DLink mostly) have configured the same VLANs, most ports are 'untagged' and belong to a single VLAN, except for the ports used to join together the switches (in a star topology), these ports belong to all VLANs and use 802.1Q tags. So far, it works really well. But on this new switch (a Dell PowerConnect 5448), the settings are very different (and confusing). I have configured the same VLANs, an the uplink ports are set in 'general' mode (supposed to be fully 802.1Q compliant), I can set the VLAN membership as 'T' on these ports for all VLANs except VLAN 1. It always stay as 'U' on VLAN 1. Any ideas?

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  • Dual mode 802.11n PCI adapters

    - by Mike Thompson
    I have recently bought a DLink DIR-825 router. It is a dual mode (2.4GZ & 5GHZ) 802.11n wireless access point/router. What is a good PCI adapter to pair with it? DLink appear to only make one dual mode adapter, which is the DWA-160 USB adapter. They don't seem to have a PCI adapter in their range, which seems very strange. Do any of the other network manufacturers make a good dual mode adapter?

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  • Slower than expected 802.11n wireless network speeds

    - by Ian
    I have two ASUS laptops running Windows 7 connected wirelessly via 802.11n at 150 Mbit, as reported by Task Manager. The router is Netgear WNDR3700. When testing the wireless connection speed using iperf, I'm not getting nearly 150 Mbit: C:\>iperf -c 10.0.0.123 -t 30 ------------------------------------------------------------ Client connecting to 10.0.0.123, TCP port 5001 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [148] local 10.0.0.116 port 53819 connected with 10.0.0.123 port 5001 [ ID] Interval Transfer Bandwidth [148] 0.0-30.0 sec 41.2 MBytes 11.5 Mbits/sec That's a typical result. Running parallel client threads does not increase the overall total speed. Why would I only be getting 11.5 Mbit on a 150 Mbit connection?

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  • Next Phase of ECM 11g Now Available - New UCM & URM 11g, & Updated I/PM & IRM 11g

    - by michelle.huff
    We're excited to announce that the Oracle Enterprise Content Management Suite 11g is now available! Today, Oracle announced ECM Suite 11g, a part of Fusion Middleware 11gR1 Patchset 2 release, which builds upon the Imaging and Process Management (I/PM) and Information Rights Management (IRM) 11g release earlier this year. Universal Content Management (UCM) and Universal Records Management (URM) 11g are now available with many new features and enhancements. All ECM products are localized into 27 languages, use a single repository, a single installer, centralized administration, and all run on the same Fusion Middleware tech stack. Oracle ECM Suite 11g, is better integrated to fit the way you work, with extreme performance and extreme scalability. Universal Content Management One click Web content management - brings Web content management authoring, design and presentation capabilities directly into how organizations design sites, portals, and custom Web applications. Simply take in the right amount of WCM that meets your needs - all without having to rewrite the application or port it over to a new technology stack or framework. Greater business user empowerment - with next generation desktop integrations and "smart productivity folders", new Web site "design mode" for business users, and enhanced rich media support enabling users to better work with photography, graphics, videos & podcasts created today as well as contribute content within Flash files directly from the Web. Advanced manageability with extreme performance & scalability - centralized system monitoring, installation, logging, performance metrics & diagnostics, with new built in "fast check-in" features, redesigned component management interface - all running on Fusion Middleware infrastructure. Universal Records Management Enhanced user experience: Oracle URM 11g makes records management easier for both business users and records administrators. Simplifications in the end user experience allow the creation of bookmarks into often-used part of the file plan, easy copying of categories and dispositions, and integrated folder and records search. The records management dashboard provides a consolidated view into records administrator tasks and system performance. DoD 5015.02 v3: Oracle URM is fully certified against all part of the US Department of Defense records management standard - baseline, classified, and Freedom of Information and Privacy Act. This enables Federal, state, & local governments & public agencies, as well as private companies, to maintain regulated compliance. Expanded functionality through Oracle integrations: Oracle URM 11g allows for an expanded set of functionality through integration capabilities with other Oracle products. This includes configurable records definition capabilities directly within a UCM instance. An out of the box integration with Oracle BI Publisher provides easily configured and robust reporting. Additionally, 11g offers an out of the box Oracle Secure Enterprise Search integration enabling real time full text discovery across disparate systems in an organization. Read the Press Release Watch the 3 Minute ECM 11g Video Get Up to Speed with the What's New in ECM Suite Datasheet Learn More on OTN with new tutorials, downloads and whitepapers

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  • Upgrade 10g Osso to 11g OAM (Part 2)

    - by Pankaj Chandiramani
    This is part 2 of http://blogs.oracle.com/pankaj/2010/11/upgrade_10g_osso_to_11g_oam.html So last post we saw the overview of upgrading osso to oam11g . Now some more details on same . As we are using the co-existence feature , we have to install the OAM server and upgrade the existing OSSO 10g server to the OAM servers. OAM Upgrade Steps Overview Pre-Req : You already have a OAM 11g Installed Upgrade Step 1: Configure User Store & Make it Primary Upgrade Step 2: Create Policy Domain , this is dome by UA automatically Upgrade Step 3: Migrate Partners : This is done by running Upgrade Assistant Verify successful Upgrade Details on UA step : To Upgrade the existing OSSO 10g servers to OAM server , this is done by running the UA script in OAM , which copies over all the partner app details from osso to OAM 11g , run_ua.sh is the script name which will ask you to input the Policies.properties from SSO $OH/sso/config folder of osso 10g & other variables like db password . Some pointers Upgrading oso to Oam 11g , by default enables the coexistence mode on the OAM Server Front-end the OAM server with the same Load Balancer that is the front end of the OSSO 10g servers. Now, OAM and OSSO 10g servers are working in a co-exist mode. OAM 11g is made to understand 10g OSSO Token format and session handling capabilities so as to co-exist with 10g OSSO servers./li How to test ? Try to access the partner applications and verify that single sign on works. Also, verify that user does not have to login in if the user is already authenticated by either OAM or OSSO 10g server. Screen-shots & Troubleshooting tips to be followed .......

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  • WebCenter Spaces 11g PS2 Template Customization

    - by javier.ductor(at)oracle.com
    Recently, we have been involved in a WebCenter Spaces customization project. Customer sent us a prototype website in HTML, and we had to transform Spaces to set the same look&feel as in the prototype.Protoype:First of all, we downloaded a Virtual Machine with WebCenter Spaces 11g PS2, same version as customer's. The next step was to download ExtendWebCenterSpaces application. This is a webcenter application that customizes several elements of WebCenter Spaces: templates, skins, landing page, etc. jDeveloper configuration is needed, we followed steps described in Extended Guide, this blog was helpful too. . After that, we deployed the application using WebLogic console, we created a new group space and assigned the ExtendedWebCenterSpaces template (portalCentricSiteTemplate) to it. The result was this:As you may see there is a big difference with the prototype, which meant a lot of work to do from our side.So we needed to create a new Spaces template with its skin.Using jDeveloper, we created a new template based on the default template. We removed all menus we did not need and inserted 'include'  tags for header, breadcrumb and footers. Each of these elements was defined in an isolated jspx file.In the beginning, we faced a problem: we had to add code from prototype (in plain HTML) to jspx templates (JSF language). We managed to workaround this issue using 'verbatim' tags with 'CDATA' surrounding HTML code in header, breadcrumb and footers.Once the template was modified, we added css styles to the default skin. So we had some styles from portalCentricSiteTemplate plus styles from customer's prototype.Then, we re-deployed the application, assigned this template to a new group space and checked the result. After testing, we usually found issues, so we had to do some modifications in the application, then it was necessary to re-deploy the application and restart Spaces server. Due to this fact, the testing process takes quite a bit of time.Added to the template and skin customization, we also customized the Landing Page using this application and Members task flow using another application: SpacesTaskflowCustomizationApplication. I will talk about this task flow customization in a future entry.After some issues and workarounds, eventually we managed to get this look&feel in Spaces:P.S. In this customization I was working with Francisco Vega and Jose Antonio Labrada, consultants from Oracle Malaga International Consulting Centre.

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  • Can't connect to wireless-n in dual mode.

    - by Tyllyn
    I recently purchased a Acer Aspire Revo AR3610-U9022. This little nettop uses a Atheros AR5B91 Wireless Network Adapter. I also have a Netgear RangeMax NEXT Wireless Route (model WNDR3300). I have been using this router in dual mode (11G and 11N) on my normal desktop without a problem (Mode: Up to 270Mbps at 5GHz & 54Mbps at 2.4 GHz), but doing this, my Revo won't detect the 11N network as being around... my desktop still does, but the Revo, nope... just the 11G. However, when I switch my router over to just "Up to 270Mbps at 2.4GHz", it kills the 11G entirely, but the Revo recognizes the 11N network. I'm a programmer by trade, and this hardware-y stuff confuses me more than it should. Is there any way that I could set this stuff up so my Revo can connect to the 11N part of my router, but keep the 11G around? :) Thanks!

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  • how to create a 802.11n wireless network between laptops and asus n-13 wireless adapter ?

    - by xpugur
    I have a asus usb n-13 wireless adapter and 3 laptops in a home we try to create a network witn 802.11n standards but failed each time laptops have intel 5100 agn. We try to create network with wpa-2 personal encryption that also fails(couldn't connect) but with wep encryption connects but with 802.11g standard... so do you know how to create a 802.11N based network? ... thank you...

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  • how to create a 802.11n wireless network between laptops and asus n-13 wireless adapter ?

    - by xpugur
    I have a asus usb n-13 wireless adapter and 3 laptops in a home we try to create a network witn 802.11n standards but failed each time laptops have intel 5100 agn. We try to create network with wpa-2 personal encryption that also fails(couldn't connect) but with wep encryption connects but with 802.11g standard... so do you know how to create a 802.11N based network? ... thank you...

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