Ethernet is the most common set of standards for wired connections in local area networks.

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Multiple IPv6 addresses added to interface, now IPv6 not working on my server

I got /64 IPv6 block from my server provider. When I add few IPv6 addresses (maybe 10 or 20) to network interface. Everything works fine about IPv6 network. When I'm added above 500+ IPv6 addresses ...
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1answer
32 views

Assign more than one IP Address to the same MAC Address on Linux ISC-DHCP Server

I have the following question: One Linux DHCP server in pool mode, because of the step of fabrication, all the products have the same MAC Address that is changed at end of line, the boards use ...
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1answer
22 views

Infiniband switch, uplink

Regarding switches like Mellanox Voltaire VLT-30011 (QDR IB, managed). I see a gigabit ethernet port on the switch which in the manual ...
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1answer
42 views

Linux server as router emulating commercial modem [closed]

When you buy some commercial routers like TP-LINK or Buffalo or many others, you have the chance of connect to a wan network. So if in a commercial router I set the IP Address 192.168.0.2 and ...
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1answer
17 views

Can we use a ADSL2+ modem in bridged mode to convert to ethernet WAN? [closed]

I am no networking master, so I have no clue if this makes sense. I have a DSL line from my internet provider with all the service details. Now, I have a TP-Link modem (+router) WD8961N. This is ...
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1answer
31 views

route table issue when I appended option net.ifnames=0 to grub2

I appended two options net.ifnames=0 biosdevname=0 to grub2 because I want to change default network name to old name eth0 on RHEL 7. After that, I edited /etc/sysconfig/network to set default ...
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34 views

Making shared drives available on wifi?

I'm setting up a small office network. We have a raid connected to an ethernet switch, and that is accessible by all PCs connected to that network. My problems start when I tired to provide access to ...
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29 views

10gb ethernet direct connection (no switch)

Im trying to connect 2 computers with 2 PCIe "Core 4 HP 671798-001 HP CX-2 NIC 1 PORT 10GB" I'm using a SFP+ Direct Attach Copper Cable (I think they are also called twinax) I found a similar ...
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81 views

How to dynamically find the name and type of interfaces attached to a system

I have a use case where I need to dynamically configure some files which includes the name of the interfaces present in system say eth0 , wlan0 . However when I change the system sometimes its changed ...
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1answer
13 views

how to disable ethernet interface eth5 permanently and how my added routes in rc.local file is unset when i reboot machine

actually my machine having 3 interface cards eth0 eth4 eth5 where eth0--local ip and eth4--wan Ip1 and eth5--wan ip5 but i want to disable permanent eth5 and i have added some routes in rc,local file ...
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2answers
95 views

How to install USB-to-Ethernet Adapter on Windows Server 2012 [closed]

I am having problems installing a USB-to-Ethernet (model HB-T66) on my HP ProLiant ML310e Gen8 v2 server (Intel Xeon) running Windows Server 2012 R2 Standard. In Device Manager, the device appears at ...
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216 views

Is it possible having two Ethernet connections simultaneously on the same UTP Cat6 cable? [closed]

Actually it is a two part question. 1.Since an ethernet connection only requires 2 pairs (green and orange), is it feasible to wire blue and brown pairs to a different Lan port of a router and ...
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53 views

Sudden failure of networking interface on CentOS 7

We're running a LAMP stack VPS on CentOS 7 hosting a few websites, MariaDB databases, and associated services. In the middle of the night our server mysteriously went completely offline. When we ...
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1answer
45 views

Router - huge difference in Tx vs. Rx

I have two computers: (B) Banana Pi - 1 Gigabit Ethernet, Wi-Fi (supports 802.11n) (D) Desktop PC - 1 Gigabit Ethernet, Wi-Fi (2x2 MIMO, supports 802.11n) And (R) Mikrotik RouterBOARD RB951G-2HnD ...
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1answer
17 views

Is PoE 802.3af Compatible with 802.3at?

If I connect a device that is compliant with POE 802.3af (surveillance camera) to a device (switch) which is POE 802.3at. It will work?
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23 views

Weird network interrupt issue

in ifconfig output i am seeing Interrupt 16 but when i check in /proc/irq/ i am not seeing number 16 there. following number i am seeing here. my driver is broadcom tg3 [root@centos7 ~]# ls ...
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49 views

802.1q VLAN echo replies do not include VLAN ID

I am running a SLES11, SP4 kernel on 2 systems. I have 2 NICs connected through a Netgear GS724T switch. I have configured VLAN 400 on the switch. On system 1, I create a VLAN 400 on eth0 called ...
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2answers
118 views

can two nic have same subnet but different network? [closed]

Business case: A computer has eth0 and eth1 and eth0 address is 192.168.1.2 (static). The eth0 is used by a configuration software to configure the address of eth1 in the field. eth0 is only for ...
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1answer
48 views

10GB Ethernet latency, unsaturated cross-connect

I'm using shared (between few clients of a vendor) 10GB cross-connect in exchange data center. We receive few multicast data streams (each stream delivers data on some group of "stocks"/derivatives). ...
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235 views

*-network UNCLAIMED : How can I fix this issue

Out of the blue my second ethernet port stopped working. Both of them are part of the motherboard. I can see both of the ports in bios. They were working, but I was using only one of them up to now. ...
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1answer
103 views

Windows Server 2012 r2 standard with dual NIC + DHCP

Currently I have a physical host with Windows Server 2012 r2 standard installed and DHCP role enabled. In addition the physical host has two network interface cards. I am planing to connect the ...
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1answer
214 views

Color coding to connect rj45 socket and rj45 connector to make an ethernet extension cable [closed]

i want to make a cable like this: What should be the color coding to make this Ethernet LAN Network extension Cable. I have a rj45 socket and a rj45 connector but there indicator on rj45 female ...
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1answer
88 views

How to Find and Expose the Ethernet Interfaces in a RHEL5 Iimage dd-ed to a Different Machine

We captured the disk image off an IBM PS-703 (P-Series, i.e. Power-PC) BladeCenter using dd. in rescue mode. The image is RedHat 5.11. The goals were to have a backup image of the server and to be ...
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73 views

ensure “switch redundancy” on a network

I'm struggling in connecting two Windows 7 PCs (each with a 2 port Intel NIC) via two complete redundant paths. And I want to make it transparent to the services on that system. I was thinking on ...
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211 views

How can i disable reverse path filter rp_filter in mac

I am following this Ubuntu Linux - two interfaces, same subnet, different vlan - MAC/ARP issues # sysctl -w net.ipv4.conf.eth1/102.rp_filter=0 # sysctl -w net.ipv4.conf.eth1/103.rp_filter=0 But ...
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115 views

How to diagnostic internet access failure on a linux system?

I have a VM running on Xen. The virtual machine was running fine for months and suddently the network access broke down. Dom0 DomU .-------. bridge ...
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1answer
232 views

Should I use a straight-through or cross-over for router to extender cabling?

I'm trying to conncect a router to a repeater (extender) should I use a straight-through or cross-over for the ethernet?
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2answers
262 views

Lightning/surge risk of Ethernet cable run inside an exterior wall [closed]

In a previous question, I had planned a Cat6 (Ethernet) cable run outside a home, adjacent to a coax run. I was advised against it, and I'm interested in taking that advice. Now I'm considering ...
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9 views

Does Intel's FlowDirector work for multicast traffic?

FlowDirector works by sampling outgoing packets, and establishing a core<->flow association so that when packets come in, it can lookup which core to send it by way of the usual RSS 3 or 5-tuple. ...
4
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1answer
508 views

Surge protection for outdoor network cable run [closed]

I'm going to have a network cable run between floors of a home, and most of the run will be outdoors, up the side of the building. I ordered a spool of shielded UV-rated waterproof Cat6 cable. From ...
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81 views

Transparent switch from Wifi to ethernet

I have the following network setup: Zyxel USG 200 Firewall which also acts as DHCP server 2 Switches 2 Wifi APs (Zyxel NWA3560-N and WAC6503D-S) with NAT and DHCP disabled The clients (mostly ...
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110 views

Trouble with network (ping, route, gateway)

I have a server running CentOS 7 and I connect to it by ssh. SSH takes a little bit to connect compared to the other server I have setup. This server has 2 ethernet ports (1 motherboard and 1 card). ...
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1answer
105 views

NIC seems slow, even on 100Mb/s full duplex [closed]

So I have a server running Centos 6 64bit with cPanel. It's set on eth0 running at 100MB/s full duplex. But, one particular server seems sluggish on its connectivity, despite server load being minimal ...
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68 views

Suse11 default gateway lost after interface restart

Doing some test on a SLES 11 SP2 virtual server I noticed the default route was lost after restarting the related interface: # netstat -rn Kernel IP routing table Destination Gateway ...
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2answers
56 views

How to run 5 php processes, which uses different eth interfaces?

I'm using cron to run everyday script, which has to run 5 php-cli processes. I need them to use separate interfaces. I have 5 devices, eth0, eth1, eth2, eth3, eth4. How can I call php to make sure ...
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1answer
377 views

VMware infiniband configuration

I have a server which is intended to be a vmware host. This server has two Infiniband Mellanox ConnectX-2 dual-port cards. What I want to do is to make the following setup: The first card should work ...
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3answers
142 views

Long cat5e cable

Cabling contractors put wires according to plan however I think the distance is longer than 100 meters as I cannot see devices connected on another end. When the cat5e cable is longer than 100 meters, ...
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333 views

Route Traffic For Specific IP Range Through Specific Network Interface

On Ubuntu 14.04. I need to route the traffic to specific IP ranges though a specific interface. route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref ...
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98 views

Can an improvised UTP cable from multiple CAT3 cables be improved? [closed]

First of all, a disclaimer: this is a total hack job, and I'm only a networking DIY enthusiast. I live in a student housing cooperative, and the two houses it comprises have an unused phone network ...
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1answer
126 views

Virtual interfaces with different MAC addresses

I try to figure out how to set up two logical network interfaces (at one physical interface) with separate MAC addresses on a Linux machine. My first attempt was to use macvlan which seemed to work ...
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1answer
110 views

Vios x LPAR Clients - SEA relationship

I am developing a script to list all SEA adapters in a VIOs, their related physical, virtual adapters, along with their status and VLAN TAG ids. I wish to include on this script the VIO clients ...
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477 views

Fast Ethernet UDP optimize receive buffers

I have a Linux computer which must receive streaming data from several devices (up to 30 or so) during long terms. This computer is connected to a Fast Ethernet local area network (100 Mbps) where ...
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1answer
83 views

db servers direct ethernet connection

We are planning to setup 2 mysql servers in master-master replication Is it possible to use direct Ethernet connection over gigabit ethernet port on the 2 servers? Is there a way to bind mysql ...
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1answer
284 views

Send network signal over a very long distance of copper

I have an issue were I need to interconnect 2 switches together. We've estimated that they are 1400 meters away (cabling distance). I wanted to use a media converter to extend the signal on OS1 ...
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111 views

What happens when overloading an ethernet cable

As the title suggests, what happens when overloading an ethernet cable? Let's say, I'm using a cat5 cable and transferring 150mbit over it. What will happen? Will it slow down to something below ...
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271 views

Meru wireless access point to controller traffic - packet analysis

We have been having persistent issues with a laptop cart in one of our buildings. The Problem The laptop cart contains (20) Lenovo E531 (i5) laptops running Windows 7 Pro connecting to our greater ...
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84 views

Automatically activating bridge slave connections

I created a bridge connection in the NetworkManager applet and assigned two ethernet interfaces to it. When I click connect on the bridge connection, the setup halts at "Obtaining network address" ...
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2k views

What is this wiring panel and what are these Ethernet “ports?”

In my office's building there is a stone-age LAN rack with some Ethernet ports I've never seen before. I need to find the name of this ports, if they have one, and then buy some cables or adapters. ...
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85 views

e1000g1 not running how to check if hardware is ok

system : Solaris 10 T2000 When I use the ifconfig -a I see the e1000g1 is UP but there is no RUNNING state. With dladm show-dev I get down. When I replace the cable from e1000g1 to e1000g3 (not ...
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262 views

Cluster computing over Wifi

I was recently reading about Cluster Computing and how it used Ethernet as preferred interface. My question is why not use WiFi? It has a 300Mbps (802.11n) throughput and without all the wiring ...