A network switch or switching hub is a computer networking device that connects network segments.

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Determinte Switch IP/Linux

i'm trying to determine the ip of the network switch several linux boxes are plugged into. Background: i need to know in which physical port they're plugged in, so the machines automatically detect ...
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1answer
30 views

read switches usually in while loop

I want to know the usage of read switches with some good examples. as instance I know about -t -s -p switches: -t: he -t option followed by a number of seconds provides an automatic timeout for the ...
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2answers
60 views

What features to look for in a switch?

I work at a small engineering company and we run simulations on 3 different computers, which read and write a large number of files onto a 4th computer. I hadn't run the simulations in a while, and I ...
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0answers
97 views

Vlan with multiple switches

I have an Asus rt-N66U with Tomato 1.28 115-EN. My goal is to separate wired and wireless traffic, so what I would like to do is attach this router with two HP 24 port managed switches. So I have ...
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4answers
499 views

Why doesn't it matter which ports I use on a switch?

The electrical engineer in me says "use any port" it doesn't matter. Gut instinct wants me to put the router's cable right in the middle. Ultimately, the router went to Port 1 at one end of the switch ...
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1answer
201 views

Repurposing old router as switch and/or AP causes other users to suffer increasingly horrible web page load times - is this normal/fixable?

I read through a number of threads regarding switches prior to posting this and couldn't seem to locate an answer. The setup: Time Warner Cable, to support their 50Mbps connection, provides an ARRIS ...
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0answers
5k views

VLANs setup via untagged hybrid ports on ProCurve switch?

Is this a path to set up VLANs in my small office with a hp V1910 series ProCurve switch? ... and what am I missing? The network is /24, so all IPs are in the same 192.168.0.X subnet. The switch is ...
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1answer
90 views

Force client to use specific Lan port to connect to server

Newbie question: I have a NAS box connected to my gigabit ethernet Switch, the same NAS box is also connected to a 100mbps router switch to connect to the internet. The client users are wirelessly ...
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1answer
133 views

Inter server connectivity getting lost after applying Cisco switch configuration

I have 2 Redhat servers in cluster. The eth0/eth2 ports on both servers are in bond0(which is assigned IP). The eth0 and eth2 from server1 are physically connected to giE0/3 on switch1 and 2 ...
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2answers
71 views

Turning an old router in to a swich

I'm playing with the idea of turning an old router which lying around in to a switch and attaching this to my current router. It's not so much because I need the extra ports, mainly because I am quite ...
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0answers
140 views

169.254.x.x with a switch connected to a CGN3 modem gateway?

I have a CGN3 modem (Rogers) connected to a TP Link switch. This was working for many months but it has stopped working. Now, PCs get assigned 169.254.x.x when the switch is connected. Connecting ...
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1answer
224 views

cisco vlan: can a trunk port talk to an access port under the same vlan?

Let's say we have a trunk port A with native vlan 2, access port B with vlan 2. When A send an untagged frame to B, can B receive it? When A send a tagged frame with vlan id 2 to B, can B receive ...
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3answers
751 views

Sharing internet from a Router to Switch

We have a TP-Link (TD-W8951ND) Modem Router : Internet Connection from BSNL, India. D-Link DES-1024D 24-Port Switch : 16 Computers connected and we have a local site running which will be accessed ...
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1answer
1k views

Home Networking: Connecting a switch to a router

I have the following network setup: EE Fibre going to a BT Infinity modem. EE Brightbox router, WAN port connected to the EE Modem. Port 1 connected to a Netgear Gigabit Switch 8 Port Netgear GS308 ...
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2answers
69 views

What will happen if a bridge got a wrong mac record?

Let's say there is host H1, H2, switch S1 S2, and S3, bridge B1, B2. It is connected like this: H1 - S1 - B1 - S2 - B2 - S3, | H2 H2 is sending frames to H1. Then, ...
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3answers
625 views

Is the idea that a switch is a multiport bridge accurate?

I think there are at least 3 differences: switches don't allow multiple mac addresses belonging to each port Switches don't use the fast spanning tree and use different management mechanism switches ...
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244 views

Connect server through switch on local network

What I am trying to do is to connect two computers together through switch. First computer is with Win8 OS. Other is Ubuntu Server 12.04 OS (apache webserver). I am connecting them with LAN cable ...
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0answers
1k views

Wake-on-LAN stops working after a few hours

I have a Linux server (Ubuntu 12.04.03) which serves as the internet gateway for our LAN of about 15 PCs. That is, eth0 on the Linux server is the Internet, and eth1 plugs into an unmanaged switch (a ...
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1answer
300 views

How to send the IP of a router from another via dyndns?

I have a main ZyXEL router with integrated modem so it is connected to the ISP directly via ADSL. I have a DVR in LAN1 and I want to access it remotely via Internet. I configured everything, set the ...
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3answers
4k views

When connecting two switches, should I use normal switch ports or the SFP ports?

I have two 48 port gigabit Netgear switches with 2 SFP ports each (I also have two Mini-GBIC copper transceiver modules) Is it best to set the ports up by using the built in ports (i.e. plug port 1 ...
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2answers
1k views

Does a switch know the mac address of other port of a bridge?

Let's say we have switches A and B, they are connected by bridge C. Does A knows about the mac of nics connected to B? Is it true that every time when nic on A want to send a frame to nic on B, the ...
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1answer
44 views

Does a network bridge maintain the topo a bridged lan?

As the title suggest. Let's say we have switch A, B, C and A connect to B with bridge D, and B to C with E. A <--> D <--> B <--> E <--> C Does D know the mac of nics ...
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1answer
34 views

How does an ADSL modem tell which local client to associate with each response from a server?

Does an ADSL modem generate a random string for each request I make and when response comes it directs it to my computer (but not to my phone)?
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6answers
644 views

On a switched network, why do unicast packets not addressed to me reach my NIC when I'm in promiscuous mode?

When I'm connected to a switch, the switch knows which MAC address belongs to which port. So even when I'm in promiscuous mode, why do I receive unicast packets that are addressed to other MAC ...
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1answer
121 views

Connect a router to a switch to use wifi

My laptop is connected to a switch (more then 24 pc) with a wire. I would like to be able to use my laptop everywhere. I bought a wireless router (d-link) and connected the wire to the wan port, but ...
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2answers
199 views

What are OSI model layers! Are they tangible?

I know about all layers and their functions. BUT, how to interfere with/use them? I read that each layer adds its own data, are there 7 layers built into my router/switch ?
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2answers
12k views

How do I find the addresses of other HP switches in my network?

I'm trying to find the IP of a switch, in order to set it to factory defaults. I heard there's a command for HP Switches to find all surrounding HP Switches. What is it?
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1answer
38 views

Is it possible to connect two uswitches using more than one cable?

In theory (I have not successfully tried it yet), you can bind two ethernet interfaces and make them act as one (sharing/balancing the load) in linux machines, (theoretically) doubling the speed. I ...
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1answer
100 views

Computer wont turn on immediately

Having an issue with my stack, I'll try to describe it as best I can. Was hoping for some advice from you kind people. I turn off my computer normally every time I shut it down, no programs running ...
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0answers
80 views

how to connect to WAN through wireless network router

I'm currently using TL-WR841ND with firmware version V8_130506 to connect to internet using the setting in this picture by using a LAN wire provided by my ISP in my router's WAN Port: I have been ...
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2answers
191 views

How does a switch forward two different IP addresses?

Comcast allows the home user to buy a second IP address. I bought a Cisco switch (I don't know whether it's Layer 2 or Layer 3) based on some advice I got. One port of the switch is connected to my ...
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134 views

Windows 8.1 Program switches to desktop

I've got some weird issue happening since I installed Windows 8.1 when it officially came out. Every day, approximately within 10 minutes after boot of the system, the program (in all cases so far ...
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2answers
238 views

What do I need to set up a basic “prosumer” or low-end enterprise level network?

I've gone through too many consumer routers (most recently it seems that a capacitor failed on my Netgear WNDR3700) and a friend suggested I look into Ubiquiti. I'm currently in a three floor ...
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1answer
164 views

Vlan config for switches

I am adding 4 HP switches into an environment with vlans. I need to separate 2 data networks and 1 voice network. I am rusty on the tagging, untagged and trunk needs. Each vlan will have its own ...
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3answers
768 views

Not sure how to find my switch?

newbie question, I'm afraid: I got a second hand (or maybe more) Cisco WS-C2948G switch off eBay for use at home, but the thing came with no documentation and no software. I'm not a sysadmin, and I ...
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1answer
237 views

Arp table on a multi switch vlan

Lets say I have multiple cisco switches that are all on the same VLAN. The question is: If I do "arp -a" on a pc that is connected to one of the switches. Do I get the Ip and Mac addresses of all ...
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1answer
398 views

How to share 1 monitor with 2 PCs

I have 1 monitor and 2 PCs. I would like to connect either PC via DVI cable with a single monitor. Does exists some DVI cable with 2 IN connector and 1 Output (monitor) with the possibility to switch ...
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1answer
563 views

Wireshark traffice capture- one subnet to another subnet

My setup is a computer with wireshark connected to switch on LAN network. The subnet IP that the wireshark is on is .0.# . I would like to capture traffic between subnet IP of .0.# and .2.#. However ...
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1answer
462 views

Network switch losing TCP packets between devices and a PC

I have a custom AVR microcontroller board that has a TCP/IP module (chip) for communication with PCs. My PC has a 4-port Gigabit Ethernet card. Each port is connected to an Ethernet switch HP ...
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3answers
2k views

How to connect pc through adsl router to cable modem

I have motorola cable modem with IP 192.168.100.1. It has DHCP in it switched on. To this modem is connected WIFI ADSL router EDIMAX through one of the four ethernet port. I read that I must turn off ...
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1answer
955 views

Do I get benefits of a gigabit switch with 100 Mbps modem?

We have an ADSL modem which has four 100 Mbps ports. In one of them we have a 20 port 100 Mbps switch where all the networking devices are currently connected. If I buy a gigabit switch and connect it ...
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111 views

Communication between VLANs

We have got a 16 port switch and is divided in 2 VLANS of 8 ports each: VLAN1 uses port 1-8 with network 192.168.10.0/24 VLAN2 uses port 9-16 with network 192.168.20.0/24 Computer A is connected ...
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2answers
567 views

Connection loss to random websites on LAN

I work in as an IT manager in an office where there are 10+ computers. What my question is that, a particular computer has a connection to some websites. The network setup is a LAN connected to a ...
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1answer
495 views

ASUS RT-N10 router and a 8 port wireless switch to make a network of 10 PCs

I need to set up a 10 PC network for playing games and sharing files. We all use windows 7. I've heard that if I connect a switch to a port on the router and others to the computers then the ...
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4answers
903 views

Connect three computers (including one laptop) to one monitor

I have the following hardware: 2 Desktop PCs, running Windows XP and Ubuntu Macbook Pro a LCD monitor, a wired keyboard, and a wired mouse Currently, I'm using an oldish IOGear KVM switch to ...
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1answer
2k views

Installing home wired network with multiple switches

I'm about to lay Gigabit network cabling in my new house. I want a wired network in almost every room of the house and some with several cables (i.e. living room with LAN for xbox/ps, video LAN cable ...
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2answers
920 views

Gigabit Ethernet switch under Megabit router

Suppose I am very poor, which I am, I can only afford a 10/100 router and a gigabit switch. If I am to connect everything under my router which runs at 10/100M, everything will of course runs at ...
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1answer
4k views

Connecting WNDR3700 Netgear router as a switch [duplicate]

I recently moved over to Verizon FIOS and I must use their router. So I want to try to use my old Netgear router as a switch (no wireless) for additional ports. I connected the main router into a LAN ...
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1answer
142 views

How to extend the number of ports on a Switch?

Consider that I need to connect 15 computers on different collision domains. I understand that each port on a switch has a separate collision domain. So, all I need to do is to connect 15 computers to ...
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3answers
2k views

Using a VLAN to isolate a device from network broadcasts

I have a device that needs to be isolated from broadcast traffic (excess broadcast traffic is causing the device to crash), but the web console on the device still needs to be accessible via a ...