http://forums.cabling-design.com/comp.dcom.lans.ethernet-newsgroup13-.htm - Ethernet hardware and protocol related discussions en-us Sat, 04 Jul 2009 21:38:06 -0400 info@cabling-design.com http://www.cabling-design.com/ http://blogs.law.harvard.edu/tech/rss/ http://forums.cabling-design.com/MTU-for-cable-modem-connection-to-shawca-article8276-13.htm The interface to my cable modem connection to shaw.ca here on Pender Island has MTU 576 whereas I would have expected to find MTU 1500. joule:/home...... The post has 13 replies so far. Read more and discuss here ... The post has 13 replies so far. Read more and discuss here ]]> Sun, 28 Jun 2009 13:53:47 -0400 http://forums.cabling-design.com/Why-4-pairs-in-100BaseT-article8267-13.htm Connections between desktop computers and hubs/routers customarily us RJ45 copnnectors and cat5 cable carrying 4 twisted pairs. But, AIUI, only 2 of ...... The post has 7 replies so far. Read more and discuss here ... The post has 7 replies so far. Read more and discuss here ]]> Thu, 04 Jun 2009 10:32:46 -0400 http://forums.cabling-design.com/IGMP-fastleave-article8264-13.htm Hello, trying to understand how quotfastleavequot works I do realize its related to IGMP Leave messages and how they are processed by IGMP aware swit...... The post has 2 replies so far. Read more and discuss here ... The post has 2 replies so far. Read more and discuss here ]]> Fri, 29 May 2009 03:28:33 -0400 http://forums.cabling-design.com/networking-middleware-article8254-13.htm Hello there are a few companies out there (for example, quotIPinfusionquot and its ZebOS platform) delivering , as they call it, networking middlew...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Tue, 26 May 2009 02:05:16 -0400 http://forums.cabling-design.com/Newsgroup-article8233-13.htm Is it me, or has this newsgroup gone dormant I have seen (almost) nothing but spam for weeks. Perhaps Usenet itself is nearing the end of its useful...... The post has 23 replies so far. Read more and discuss here ... The post has 23 replies so far. Read more and discuss here ]]> Tue, 19 May 2009 11:45:15 -0400 http://forums.cabling-design.com/multicast-address-article8230-13.htm Hello studying multicasting and IGMP specifically, and have a few points I dont clearly understand. First of all why do we need Ethernet multicast ...... The post has 2 replies so far. Read more and discuss here ... The post has 2 replies so far. Read more and discuss here ]]> Tue, 12 May 2009 05:14:43 -0400 http://forums.cabling-design.com/STP-cost-article8227-13.htm Sir, Can you pl tell me the formula for calculating STP cost How cost of 19 is arrived for 100Mbps interface amp 4 is arrived for 1Gbps interface ... The post has 2 replies so far. Read more and discuss here ... The post has 2 replies so far. Read more and discuss here ]]> Fri, 01 May 2009 05:15:01 -0400 http://forums.cabling-design.com/INVITE-New-LinkedIn-group---quotConnected-Home-Netwo-article8223-13.htm INVITE: New LinkedIn group quotConnected Home Networkingquot for professionals working with, Wireless, Fiber, Structured Cablings systems, Audio, Vide...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Thu, 16 Apr 2009 11:50:38 -0400 http://forums.cabling-design.com/rate-limits-article8219-13.htm Hello many L2 (and likely L3+) switches have such a feature as rate limiting. It seems such feature is applied per port basis, as well as per connec...... The post has 3 replies so far. Read more and discuss here ... The post has 3 replies so far. Read more and discuss here ]]> Tue, 07 Apr 2009 20:45:15 -0400 http://forums.cabling-design.com/confused-about-PHY-and-transeiver-article8210-13.htm Hello Im confused about definitions of PHY and Ethernet transeiver. They aint the same, as I assume. Transeiver as I understand, is rather a sort of...... The post has 5 replies so far. Read more and discuss here ... The post has 5 replies so far. Read more and discuss here ]]> Thu, 02 Apr 2009 20:37:00 -0400 http://forums.cabling-design.com/Root-access-on-a-solaris-10-system-connected-via-c-article8201-13.htm Hi, Comfort and peace, I wish you. Here is a free access....(this may help you test/learn stuff about ethernet, this system is actually on a homeplu...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Tue, 31 Mar 2009 21:08:27 -0400 http://forums.cabling-design.com/L2-switchs-behavior-article8197-13.htm Hello I wonder is it a normal switchs behavior, when it, being connected to a LAN, but not transmitting/receiving any traffic, starts learning proce...... The post has 12 replies so far. Read more and discuss here ... The post has 12 replies so far. Read more and discuss here ]]> Mon, 30 Mar 2009 22:48:43 -0400 http://forums.cabling-design.com/Can-a-boot-ROM-redefine-a-MAC-address-article8194-13.htm Howdy, For diagnostic purposes I would like to install a board with a preconfigured MAC address. I know that most drivers permit changing the MAC fr...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Fri, 06 Mar 2009 19:17:03 -0500 http://forums.cabling-design.com/LAN-type-article8191-13.htm Hi all, Recently a friend of mine asked me,on seeing a LAN,how to find its type, the only answer i could give her was , on seeing the cabling us...... The post has 2 replies so far. Read more and discuss here ... The post has 2 replies so far. Read more and discuss here ]]> Thu, 05 Mar 2009 20:35:42 -0500 http://forums.cabling-design.com/Daisy-Chain-Multiple-Ethernet-Devices-article8183-13.htm Sorry if this is a goofy question, but Id like to hook up multiple devices (a PS3 and an Apple TV) to my Ethernet network, but both only have one Ethe...... The post has 8 replies so far. Read more and discuss here ... The post has 8 replies so far. Read more and discuss here ]]> Tue, 03 Mar 2009 16:11:13 -0500 http://forums.cabling-design.com/WANTED-TO-BUY---CISCO-BROCADE-EXTREME-NORTEL--article8182-13.htm WANTED TO BUY : CISCO, BROCADE, EXTREME, NORTEL, LUCENT, FOUNDRY, MICROSOFT, ADOBE AND LOTS MORE.. PLEASE TAKE A LOOK BELOW AT MY WANT TO BUY LISTI...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Sun, 01 Mar 2009 19:05:53 -0500 http://forums.cabling-design.com/Ethernet-switch-flooding-packets-article8167-13.htm Hi All, I did a WireShark packet trace this evening on the network. I was surprised to see quite a few packets that werent meant for me. Naturally ...... The post has 11 replies so far. Read more and discuss here ... The post has 11 replies so far. Read more and discuss here ]]> Wed, 11 Feb 2009 16:06:07 -0500 http://forums.cabling-design.com/Wifi-access-pointrouter-for-business-article8159-13.htm Hello. At work we have alot of consumer wifi AP and routers (acting as APs) and they work rather poor. I have finally got through with my statement t...... The post has 10 replies so far. Read more and discuss here ... The post has 10 replies so far. Read more and discuss here ]]> Fri, 06 Feb 2009 07:38:14 -0500 http://forums.cabling-design.com/Re-NIC-question-amp-troubleshooting-article8153-13.htm xposted to some other useful groups quotGeorgequot ltgeorge@nospam.invalidgt wrote in message news:glv10h3nr1@news.motzarella.org... igt Jeff Liebe...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Fri, 30 Jan 2009 11:09:39 -0500 http://forums.cabling-design.com/Re-Ethernet-and-AC-in-conduit-for-remote-WAP-article8144-13.htm yeah we have warning labels on everything, and lawyers just waiting at the gate.... My son amp I find it humerous to read some of the warning labels...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Sat, 03 Jan 2009 13:21:31 -0500 http://forums.cabling-design.com/Re-ethernet-and-AC-in-same-conduit-article8136-13.htm added the cabling amp ethernet groups seaweedsl wrote: igt I know its not recommended or allowed by the NEC , but Im wondering/i igt if anybody know...... The post has 11 replies so far. Read more and discuss here ... The post has 11 replies so far. Read more and discuss here ]]> Fri, 02 Jan 2009 20:47:10 -0500 http://forums.cabling-design.com/What-is-JUMBO-frame-article8125-13.htm What is actually a JUMBO frame Does it standardised How a L2 switch accept JUMBO frame, when an ethernet frame size (maximum) can never exceed 1522 as...... The post has 4 replies so far. Read more and discuss here ... The post has 4 replies so far. Read more and discuss here ]]> Sun, 28 Dec 2008 11:34:58 -0500 http://forums.cabling-design.com/How-to-generate-data-packet-(traffic)-from-a-PC-article8124-13.htm I want to use my PC as a client along with WAN applications. To test the functioning of the networks, i want to generate data packets from the PC. Ca...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Sun, 28 Dec 2008 11:28:37 -0500 http://forums.cabling-design.com/SNMP-walking-article8123-13.htm I have heard about SNMP walking. Can you explain me what is SNMP walking The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Sun, 28 Dec 2008 11:22:36 -0500 http://forums.cabling-design.com/configure-article8122-13.htm I have fixed ip from my ISP. How do I configure it for one of my PC which is a server. The rest of the PC to be on DHCP NAT. The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Sun, 28 Dec 2008 04:40:56 -0500 http://forums.cabling-design.com/Gigabit-Ethernet-PHY-without-NDA-article8118-13.htm This is a repost of the following article: From: Matt Ettus ltboyscout@gmail.comgt ...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Wed, 17 Dec 2008 05:11:39 -0500 http://forums.cabling-design.com/How-to-test-Ring-such-as-EAPS-or-RSTP-recovery-tim-article8114-13.htm Does anyone know how to test Ring or RSTP recovery time Any tools I can use Extreme networks declare the EAPS recovery time is 50ms. Thanks alot, st ... The post has 6 replies so far. Read more and discuss here ... The post has 6 replies so far. Read more and discuss here ]]> Mon, 15 Dec 2008 00:45:40 -0500 http://forums.cabling-design.com/multiplex-one-ethernet-cable-into-two-article8112-13.htm In situation where I have access to one ethernet cable between two end points, is there a way to multiplex so it functions like two independent (low...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Sat, 13 Dec 2008 05:17:46 -0500 http://forums.cabling-design.com/Enable-jumbo-frames-on-a-port-3com-5500G-switch-article8099-13.htm Hey, I want to enable jumbo frames on several port on a 3com 5500G switch. To improve performance of iscsi traffic to the SAN. Does anyone knows how...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Thu, 04 Dec 2008 14:17:29 -0500 http://forums.cabling-design.com/Re-Router-MAC-address-article8088-13.htm On 28 Nov, 09:43, Barry Margolin ltbar...@alum.mit.edugt wrote: igt In article/i igt lt78fed7467fcb4cbb9d89e1ee7cf79...@d23g2000yqc.googlegroups.comgt...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Fri, 28 Nov 2008 09:00:08 -0500 http://forums.cabling-design.com/Router-MAC-address-article8077-13.htm Hey guys, I need some info on this . I have a router/gw with x.x.x.1 ip address . When a linux system within the same n/w pings the gw, linux box get...... The post has 17 replies so far. Read more and discuss here ... The post has 17 replies so far. Read more and discuss here ]]> Wed, 26 Nov 2008 10:34:37 -0500 http://forums.cabling-design.com/difference-between-Repeaterhubbridge-switchrou-article8076-13.htm Hi all as far as i understand the difference between Repeater,hub,bridge, switch,router, gateway are as follows , how correct is my understanding ...... The post has 3 replies so far. Read more and discuss here ... The post has 3 replies so far. Read more and discuss here ]]> Wed, 26 Nov 2008 05:01:06 -0500 http://forums.cabling-design.com/I-AM-BUYING-USED-AND-NEW-EQUIPMENT--I-ALSO-NEED-L-article8075-13.htm I AM BUYING USED AND NEW EQUIPMENT. I ALSO NEED LOTS OF MICROSOFT AND ADOBE OEM SOFTWARE. If you have some Microsoft software to sell like Windows X...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Sun, 23 Nov 2008 08:20:19 -0500 http://forums.cabling-design.com/If-I-want-to-build-an-8024-MAC-(PHY)-using-an-FPG-article8073-13.htm Dear All, If I want to build a MAC that is able to handle the TokenBus Link Layer and some portion of the physical driver I would need more informati...... The post has 1 replies so far. Read more and discuss here ... The post has 1 replies so far. Read more and discuss here ]]> Sat, 22 Nov 2008 12:23:21 -0500 http://forums.cabling-design.com/Network-security-surveillance-software-article8072-13.htm Hi, Can you recommend good security surveillance software for windows networks I would like to know about potential security holes, misconfigured c...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Fri, 21 Nov 2008 03:02:50 -0500 http://forums.cabling-design.com/Telecom-Inventory-article8071-13.htm TelExpress has a huge inventory available for sale. TelExpress, Inc. has 3 distribution warehouses and has been in business for over 16 years. We al...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Tue, 18 Nov 2008 12:42:00 -0500 http://forums.cabling-design.com/8023-Length-interpretation-and-payload-type-article8058-13.htm Hi all, Ive just noticed that IEEE 802.32005 does not explicitly tell what MAC client data is when the Length/Type field contains a length value. It...... The post has 6 replies so far. Read more and discuss here ... The post has 6 replies so far. Read more and discuss here ]]> Thu, 06 Nov 2008 10:18:19 -0500 http://forums.cabling-design.com/Multiple-aggregated-links-between-devices-impossib-article8056-13.htm Hello, According to The AllNew Switch Book, only a single 802.3ad aggregated link is possible between a pair of devices. * Can someone please shed l...... The post has 7 replies so far. Read more and discuss here ... The post has 7 replies so far. Read more and discuss here ]]> Mon, 03 Nov 2008 11:35:37 -0500 http://forums.cabling-design.com/The-RaRa-Economic-Bailout-Package-(telecom-equipme-article8054-13.htm Many of our customers depend on RaRa Telecom Supply for their critical last minute and hardtofind parts or for our custom fiber and copper cables, but...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Tue, 28 Oct 2008 11:59:30 -0400 http://forums.cabling-design.com/portbased-vlan-and-tagbased-vlan-article8033-13.htm What is difference between them What i understand is 1. portbased vlan is old (before intrduce 802.3q) currently on the market every switch is tagbase...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Tue, 21 Oct 2008 14:03:31 -0400 http://forums.cabling-design.com/portbased-vlan-and-tagbased-vlan-article8032-13.htm What is difference between them What i understand is 1. portbased vlan is old (before intrduce 802.3q) currently on the market every switch is tagbase...... The post has 13 replies so far. Read more and discuss here ... The post has 13 replies so far. Read more and discuss here ]]> Tue, 21 Oct 2008 14:03:24 -0400 http://forums.cabling-design.com/star-coax-network-with-rj-adapters--article8027-13.htm Hello, Two years ago, I bought a house that already had coaxial plates installed on almost each rooms. Each plate uses a single wire (no T conectors...... The post has 28 replies so far. Read more and discuss here ... The post has 28 replies so far. Read more and discuss here ]]> Sun, 19 Oct 2008 17:42:00 -0400 http://forums.cabling-design.com/Re-Literature-on-100BaseTX-request-article8019-13.htm On Oct 15, 1:47A0pm, glen herrmannsfeldt ltg...@ugcs.caltech.edugt wrote: igt (comp.dcom.lans.ethernet added)/i igt/i igt Fred wrote:/i igt gt I have ...... The post has 12 replies so far. Read more and discuss here ... The post has 12 replies so far. Read more and discuss here ]]> Thu, 16 Oct 2008 13:47:38 -0400 http://forums.cabling-design.com/STPRSTP-query-article8011-13.htm Hi I have a couple of queries on the implementation of STP and RSTP. 1. How different is the behavior of RSTP in a shared LAN In a scenario where th...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Thu, 16 Oct 2008 03:29:05 -0400 http://forums.cabling-design.com/testing-am79c793-phy-article8009-13.htm Hello, I need your help. I want to test my ethernet 100base phy, Im using a LeCroy load board connected to oscilloscope. My problem is how to set dtu ...The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Wed, 15 Oct 2008 05:09:41 -0400 http://forums.cabling-design.com/VGA-over-CAT5e-article7983-13.htm Hi Guys, I need to get a VGA signal from the Nav Station in my boat to the monitor in the bridge. I could just run a VGA cable (about 4m worth) but...... The post has 22 replies so far. Read more and discuss here ... The post has 22 replies so far. Read more and discuss here ]]> Mon, 06 Oct 2008 00:05:00 -0400 http://forums.cabling-design.com/Ethernet-Performance-Testing-and-throughput-article7976-13.htm Hi, can someone please give some background on ethernet performance testing and throughput measurement applications like netperf, ttcp and if there ...... The post has 7 replies so far. Read more and discuss here ... The post has 7 replies so far. Read more and discuss here ]]> Fri, 03 Oct 2008 16:28:03 -0400 http://forums.cabling-design.com/mac-and-proto-vlan-classifiers-article7954-13.htm hi, can protocol classifier and mac classifier be applied on trunk ports thanks The post does not have any replies yet. Read more and discuss here The post does not have any replies yet. Read more and discuss here ]]> Thu, 02 Oct 2008 02:56:03 -0400 http://forums.cabling-design.com/Hackable-GbE-Controller-article7953-13.htm Hello, I was just wondering if there are any GbE controllers out there that do enough of their processing in the driver (or have sufficient control...... The post has 5 replies so far. Read more and discuss here ... The post has 5 replies so far. Read more and discuss here ]]> Thu, 02 Oct 2008 01:58:51 -0400 http://forums.cabling-design.com/FDDI-to-Fast-Ethernet-quotBridgequot-article7950-13.htm (Originally posted in comp.dcom.lans.fddi) Hi there. I currently have a Synoptics FDDI workgroup concentrator, and I use a server as a FDDItoEthern...... The post has 11 replies so far. Read more and discuss here ... The post has 11 replies so far. Read more and discuss here ]]> Wed, 01 Oct 2008 23:42:50 -0400