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Questions tagged [switch]

a device that bridges network segments, operating at the OSI link layer level.

Switches (in the context of this site) are devices with multiple network ports, which allow interaction between all devices connected to these ports.

Basic switches operate at the data link layer level (in TCP/IP networks) and forward packets based on the link layer address in the packet headers. They are different to hubs in the way that hubs generally broadcast incoming packets to all other ports, whereas switches keep tables of link layer addresses they have seen at specific ports and only forward packets to the relevant ports. Basic switches are also known as layer 2 devices.

Higher grade switches can include functionality at higher layers of the OSI stack. This can range from IGMP snooping (for multicast support) and VLANs through to NAT, VPN, firewalls or even application layer functionality (web caching or proxying). Such switches are known as multilayer devices.

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How do I provide Internet Access to both of my VLANS?

I have a TP-LINK T1600G-28TS, and I have 2 different VLANS (10.0.0.0/24 ID 101 and 10.1.1.0/24 ID 102), their IP addresses are defined by the switch's DHCP server. This part is working fine, I can see other devices in the same VLAN, and can't see…
user613017
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Connecting two 16 port gigabit switches

I have connected a second Netgear Prosafe 16 ports switch to a new rack of blade servers. I assumed that when added there would be 32 ports less the one to the incoming Internet and the one port on each switch used to connect them together.. That…
Johnnycobra
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HP ComWare - Detecting mac/hardware address of CONNECTED interface

Alright, so I'm adding an IRF member to our switch stack. They are 5130's, JG937A. Only problem is the IRF cables are BURIED in the rack channel (I mean buried buried), and there's no way for me to look at the switches and tell which 10GBX…
boog
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LAN cable-tester's LEDs fire at 3 and 6 (without passive side attached)

I have hardware question. I am running a duplex CAT7 cable from a patch panel to a wall socket. One connection works, the other struggles when I test the cable. Below I describe how I tested the cable and what the able tester shows. Maybe someone…
1cedsoda
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Connect two switches with two VLANs each

I have two switches (A and B), each one divided into two "Sub-switches", i.e. two VLANs. Port 1 to 12: VLAN 100 (untagged) Port 13 to 24: VLAN 200 (untagged) Now, I want to connect the switches. Of course, I could configure one port to transport…
TomS
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Remotely click Power button for equipments after blackout

I am wondering on what improvements to make to our server room, as to we won't be in the office for quite a while because of COVID. I want something like an auto clicker (physical device) that I can remotely access so that I can click the power…
Joshua Dela Cruz
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Cisco 2960 reload without rebooting

I have a Cisco 2960X (48) with a weird behavior. I keep seeing alerts from my nagios telling me that the "site" is DOWN, then UP. It happens almost 10 times a day. It looks like the switch is rebooting, people are losing their IPs, all ports are…
benbelo
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ip addresses on Vlan

I have a question maybe a dumb one but I got just started exploring VLAN's. I got a vlan and I need to give it a IP address and I have two switches. Can the IP addresses on the different switches be the same ip address like twice 172.10.15.1 or do i…
Benoit Debusschere
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Radius Authentication error between Active Directory NPS - Aruba 2930f

I am trying to configure Radius authentification using NPS backend. I have configured both ends but it does not seem to work.I am not sure if this is even correct. Kindly help. NPS Config: I have added my switch info under Radius Clients by giving…
Shruthi
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How to access a host on 192.0.2.0/24 from Linux?

I've got my hands on the FSM-510G switch that has a default IP set to 192.0.2.1. It's obviously not in the LAN CIDR block, so what should I do on a Linux host to be able to access it directly? The Linux host runs CentOS 7 and is connected to the…
monday
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Traffic not traversing VLAN over multiple hops?

I am configuring a new Cisco edge switch stack, and temporarily I am trunking this stack through another edge switch back to my core switch (no spare fiber pairs to use to trunk directly). This is how they're configured (lots of extraneous stuff…
NaOH
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Cisco Catalyst 6509 Not Powering Up WS-X6716-10GE Module

I just inserted a 10GbE 16 port line card into a Cisco Catalyst 6509 series switch and nothing happens(™). The chassis recognizes the new line card but doesn't boot it up. show power and show modules follow: #show power system power redundancy mode…
pfo
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VLAN 'Bridging' for Core on Multiple Networks

I think I have a very unique use-case that I need help with since I am not a network engineer. Here's the layout. I help operate a gaming floor network for a Casino. The thing that I noticed right away is that we have been operating under the…
Duane Gatewood
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Virtual Switch High Network Receive Traffic When Idle

Having an issue where my network adapter is constantly showing relatively high Receive traffic when system is completely idle. This happens after Hyper-V creates an external Virtual Switch. Is this normal? Any way to fix this? Environment &…
AlexVPerl
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Cisco SG switch interface statistic length of time

I am trying to determine the length of time the interface statistic screen is recording for the bytes columns on my Cisco Sg300-52 switch. I went to the cisco website for documentation but the page does not specify the length of time for the…
Zorpho
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