Questions tagged [switching]

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Configure VLANs on Open vSwitch for use with Netgear GS728TPv2 Managed Switch

I have looked all over the internet and while I have found some documentation, I am still a bit confused about how to configure everything properly. So I am hoping that someone here will be able to ...
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7 views

Packet Processing Limitation of OpenFlow Pipeline in Hardware Switches

I have a one-hop network containing 2 servers (DellPowerEdge 4700r) and a hardware switch ( ARUBA 2930F) in between. The two servers are connected via 10G SFP+ ports to the switch. I send TCP traffic ...
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3answers
116 views

Learning MAC address of next hop without knowing IP address

Say we have a LAN - 5 hosts connected to a switch. I have not configured any IP address to any of the hosts. Can I communicate with another host machine by sending L2 traffic - L2 header and data ...
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1answer
181 views

Difference between tcpdump and port mirroring? (Layer 3 switch)

When you can use TCPdump on an interface of a layer 3 switch in order to analyze the packets, why do we need to use the mirroring feature and make duplicate copies of the packets on that interface in ...
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32 views

Brocade FastIron Basic Switch Configuration

I am new to complex switching and stumbled upon a free Brocade Fastiron x648 Layer 3 switch. I am looking to integrate it into my home network and get it up and running just as a switch and then ...
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15 views

Pass-trough traffic from ISP device via switches to achieve Public IP in different building

This is our scenario: Building #1 To the Device from our ISP on port number 4 we have delivered public IP interface with SIP. When I connect to it direct all working fine as expected. Building #2 is ...
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12 views

Comms between uplinks on same vSwitch on ESX

I'm driving myself crazy thinking this should work, but it's just not! I have the below setup in ESX. The vubuntu VM has an IP of 10.0.10.99/24 as do the VMkernel interfaces (I have two as a backup)....
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78 views

ESXI Host cant reach public network

Was wondering if anyone could assist with a problem I'm trying to resolve in building my Collab. My setup is ISP->Home router->Lab router(Collabv2-RT) gi0/0 10.10.10.1 to switch Collabv2-SW1 fa0/48 ...
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37 views

Bandwidth limitation, router-on-a-stick

I have a router-on-a-stick setup with one router and multiple switches, as well as multiple vlans. The router performs all access control (ACL) and routing between the different networks/VLANs. I am ...
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25 views

External DHCP not working in Cisco Switch C3750

I have Cisco Switch C3750 (IOS version 12.2 ) and I have four physical computers and one physical Dell t30 Server connected to it. In Server, I have created DHCP with a Pool of IP Addresses. How ...
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42 views

Computer switching on but turns off before boot

My PC was working fine 2 days ago, I have switched it onfor a short time to check something, then shut it down properly, seemingly no issues. Yestersay I tried to switch it on again, heard the fans ...
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42 views

Having issues connecting PC to home media/gaming setup

Huge wall of text incoming, so please bear with me! I have a media/gaming home setup consisting of an HDMI switch (this one) which allows me to connect my various devices to my fairly recent Acer ...
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1answer
127 views

Can I swap harddrives with identical laptop, and different operating systems

My laptop had coffee spilled on it. After cleaning it up with alcohol, everything seems to work fine besides for some keys on the keyboard (which was replaced after the spill) The technician in ...
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1answer
494 views

Connecting switch through to virtual machine host-only network

I have a mac book running Mac OS High Sierra. It is host to three virtual machines running Ubuntu 16.04. All VMs have two adapters enabled; NAT and Host-Only. The mac is connected to another host via ...
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1answer
65 views

Internet Protocols: calculating end to end delay when a header is added to each packet

I have been trying to teaching myself about internet protocols, and I learned how to calculate the end to end delay for a packet switched network from this website (1c): http://www.ics.uci.edu/~...
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51 views

Switch “goes to sleep” … sometimes

tl;dr: a switch will pass traffic between 2 segments for a while, but then "goes to sleep"(?) for 1 of the two directions on that data path. Packets from 1 segment will wake it up, but not from the ...
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130 views

Netgear ProSafe with Cisco Aironet - Guest VLAN no Internet

I'm running into an issue setting up a guest VLAN on my Netgear Prosafe switch using a Cisco Aironet 1832i Access Point. The Management VLAN works as expected (issues IP addresses, can access Internet,...
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1answer
853 views

How to switch from SATA 2 to SATA 3 after cloning HDD to SSD

I have recently cloned my old HDD of my laptop to a new Kingston HyperX Savage. But it only shows half the speeds it should get. I followed the tips from this thread: How can I determine the SATA ...
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1answer
3k views

How to automate the backup of Dell switch

We are trying to automate the configuration backup of Dell L2 switch N2048. Switch is in the network with SSH, HTTPS enabled, and Telnet disabled. Steps we've tried: Plink – we could connect ...
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42 views

Use input switch as output switch?

I am trying to find a good HDMI output switch (1 input and multiple outputs), but they are pretty hard to find. But since there are so many HDMI input switches out there it got me wondering: Is it ...
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54 views

Switching Techniques - Vlan

Assume I have 3 switch connected to each other and port connected to each other are in trunking mode and sw1 have a user in vlan 10 and sw3 has a user in vlan 20. How can both user (which are in vlan ...
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1answer
886 views

layer 3 switch with vlans and home router

I have a home wireless router let's say a cisco e2500 and a layer 3 switch with 3 vlans, how can I get them to comunicate? vlans are like this 172.168.10.0 172.168.20.0 172.168.30.0 wireless has the ...
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4answers
7k views

How smart is my network?

There is an argument within my office about how smart/efficient the network we have set up really is. We have a fibre line and a cable line running into a load balancing router, which has a hardware ...
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1answer
978 views

RS232 switching matrix for multiple devices and PCs? [closed]

I have six pieces of equipment which con be controlled via RS232. I want to be able to select which pieces of equipment are connected to any one of my three computers at a given time. I know that I ...
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1answer
1k views

Netgear GS724Tv4 inter-VLAN routing

Summary I am toying with a relatively small home LAN and I am baffled and idealess as to how to configure inter-VLAN routing on GS724Tv4. I suspect it's because of some oversight on my part or simply ...
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1answer
652 views

Can I connect a CM820 modem to a switch to get more ports?

I have an Arris Touchstone CM820 cable modem (DOCSIS), but it has only one RJ45 socket. Can I connect a switch to it (like TL-SF1005D for example) in order to have more internet ports?
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1answer
74 views

Connecting router as a switch [duplicate]

In a home LAN, I have connected one router A (which is also connected to the Internet) to router B but router B is supposed to work only as a switch (I am not using the WAN port in router B at all). ...
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761 views

Switch between desktops in windows 7 when we pin many programs to taskbar

When we pin many programs to the taskbar another desktop window is added which we can switch between them as you can see in the picture: my question is how we can add them (without pinning the ...
2
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1answer
1k views

connect two vlans in cisco switch to one server

I have two VLANs on a Cisco switch. The first VLAN includes 24 PCs and the second has another 24 PCs. Now the company has decided to install a server for these computers. How can we connect these ...
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1answer
29 views

Can I use a VLAN to prevent naming conflicts from devices on the same subnet?

My scenario is this... I have a business where all of the devices are connected to two layer 2 HP switches that are joined by a static port team. All of the connected devices are on the same IP ...
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0answers
69 views

Identifying unknown switch in network

I have a managed switch and I want to identify an unknown switch that is connected to it.I have the MAC addresses of all the devices connected to it. how to identify which one is the switch?
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2answers
18k views

How to enable ip masquerading/forwarding on CentOS 7

I want to enable IP masquerading/forwarding on CentOS 7, but when I specify net.ipv4.conf.default.forwarding=1 in /etc/sysctl.conf, it doesn't work. Can any one help with this problem?
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499 views

Inter vlan routing through Layer3 switch vs Router

I am trying to understand a network configuration that I have recently inherited. I am trying to diagnose slow network speeds, internet latency, dropped packets... you name it, the network it kind of ...
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1answer
38k views

What happens if an unmanaged ethernet switch is looped (connected to itself)?

I don't know much at all about networking, and I when I tried to find an answer to this online I found someone who posted a one sentence answer saying "It would cause lots of broadcasts and collisions....
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0answers
498 views

In XOrg, can i switch keyboard-layout per application and still honor ~/.Xmodmap

I'm using my ~/.Xmodmap to map: keycode 38 = a A adiaeresis Adiaeresis and similar to be able to type German umlauts (äöü) on a US-qwerty layout. For switching keyboard layouts between German qwertz ...
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1answer
60 views

Computer goes haywire when connected to modem/router or switch, but not AP

I've got a really weird situation with one workstation on my network. Topology: Comcast Business class modem/router -> D-Link gigabit switch (192.168.42.0/24) -> Linksys EA6500 router/AP (192.168.1....
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1answer
3k views

Instead of VTP , what protocol can be used for non Cisco switches?

I got to know that VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol. So VTP can be used only on CISCO switches. So if there is a non-Cisco switch in a network, what kind of protocol can ...
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0answers
747 views

Cascading KVM switches

I have a not-so-small number of computers (say, 5) which I want to access with a single keyboard, USB and monitor. I can get an 8-port KVM switch, which is a pretty expensive piece of hardware; ...
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1answer
807 views

Disable of discrete/native graphics on MacBook Retina when using apps like VMware, VLC, etc

I got a MacBook Pro Retina a few months ago and I'm really happy with it. However, since I do a lot of work in different environments/OSes, I make heavy use of VMware to have them with me when I'm on ...
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1answer
71 views

Switching Between Desktops does not Stick

I am using a MacBookPro and use the three-finger swipe gesture to move between desktops. However, this feature seems to stop working randomly. Interestingly though, when this happens, I am still able ...
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2answers
4k views

SFP Expansion Slots - Bad terminology or Bad understanding?

I'm doing a bit of product research for my company as we need to select a special use switch for an industrial customer which requires the use of both Ethernet and Fibre connectivity from the switch. ...
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2answers
34k views

Extract and overwrite existing files

I am trying to write a batch script to extract files out of an existing ZIP file, into another folder on my desktop and to have the system not prompt me as to whether I want to overwrite the existing ...
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1answer
1k views

Moving “Workspace Switcher” in Ubuntu Unity Launcher

I need the Workspace Switcher in Unity's Launcher at the very top just below Dash or Nautilus. I need this because when I run VirtualBox the commands CtrlAlt↑/↓/←/→ are not ...
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1answer
552 views

wireless networking: can wicd switch wireless cards automatically

I have slackware64 13.37 installed on my laptop, with wicd 1.7.0 as network manager. By default wicd connects using the internal wifi card. I have a much better usb wifi card that I would prefer wicd ...
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4answers
3k views

What is the security risk of using WLAN and LAN network on a computer at the same time?

We have a few older HP laptops that when docked in a port replicator the WLAN connection is disabled and the LAN connection is enabled. We have since replaced these with Toshiba R700s which do not ...
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2answers
1k views

Enabling Alt+Tab buffer switching like Windows or Firefox in Vim

How do I set up a buffer switch like Alt-Tab on Windows:? It cycles through a list sorted by last access first? So if I pressed Alt+Tab, I'd get the last accessed buffer. If I pressed it again, I ...
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2answers
188 views

Is it possible to share a big-screen monitor - switching between personal Windows 7 laptops in the office?

We use laptops & WiFi in the office. We often make demo to each other and need to show the demo on a big screen monitor hang in the middle of the room :). I want to switch the display between ...
7
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3answers
3k views

In Opera 11, how can I set up shortcuts to switch to specific tabs?

In Firefox on Linux, we can use Alt+1, Alt+2, etc. to switch to the first, second, etc. tabs, till the 9th tab. This is very useful to switch between tabs. In Opera 11 on Linux, I couldn't find a way ...
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2answers
13k views

Switch buffers in vim without saving to a currently modified file

Ok, I'm a vim user with the Minibufexl plugin which shows buffer tabs, I've mapped Shift+J and Shift+K to switch between tabs. One thing that frequently frustrates me is while editing a file, and ...
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3answers
88 views

Get multiple systems at once?

I heard that there are some programmes that allow to feel like you have 2 OS at once, that is to say, you can easily, without rebooting, switch between them. So I have the follwing question concerning ...