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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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Ping between hosts with separate subnet

I have two hosts with different subnet Host1(Linux) has Ip Address of 172.29.1.xxx Host2 has IP Address of 192.168.1.xxx Host2 with 192 address can ping the host1 and all the servers with 172 address Host1 with 172 address can only ping the gateway…
user3784040
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Need feature name: ethernet switch recognizes manual cable disconnect and shuts down the port

Once in a hospital's radiology department, we had this nifty security feature -- I just cannot remember the proper name to succeed at various search engines: If a host's ethernet cable was disconnected, the uplink switch recognized this and as…
Twonky
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How to ssh into system connected to same network switch?

I have a few systems which are connected to the same network switch. All of them are running linux / Ubuntu 18. I want to remotely access one machine to another through ssh. That is, if I'm operating on one of the machines, I want to remotely access…
the_dance
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Stateful Firewall Rules Obeyed by Switch?

I have a stateful firewall (pfsense) with a WAN and LAN port, with the LAN port connected to an unmanaged switch (DLink Gbit) and several computers connected to the switch. I was wondering if the switch obeyed firewall rules, i.e. if I blocked all…
homeuser
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Do managed switches ping on all VLANs by default?

Amateur network admin here. I'm trying to create a link via VLAN between a VOIP PBX and an internet router. It's a large installation, so there are 4 managed switches between the two endpoints. I created a VLAN on each switch (3 HPs, 1 Cisco) and…
daveslab
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How to make old router as access point?

I have installed a new router at my home, the new router has 4 ports. And the ISP only allowed for one port to have internet connection using ethernet. That port is taken by another person, and now only 3 ports left that don't have internet…
John Sall
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Networking, MST between HPE and CISCO switches

can anybody help with this issue? I have 2 HP Procurve switches 2650 and one Cisco switch 2950 connected together like this: HP MST root (prio 16384) <-> HP IST root (prio 24576) Trk1 <-> Po1 Cisco IST member (prio 32768). There is a MSTP…
RANE
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How to secure this power cable on a network switch?

The device is an HP EI A5120 network switch. Is there a way to secure this power cable? Some other devices you can use a zip tie on these tabs. I searched but did not find a retention bracket from HP.
Bert
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Access static web-server through managed switch

I have three devices: Windows PC Managed switch: D-Link DGS-1510-20 Linux Webserver with static IP Schematic How do I configure the switch to access the static IP webserver from the Windows PC through the switch in a local Network? (complete…
imperialcode
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Router masquerade delegation to a switch

While thinking how an ISP may configure its internal network, I was wondering if it was possible to delegate a router's masquerade to a switch. Details: Let's assume there is a 48 port Gbps switch that has 48 vlans. The router is connected to the…
Pierre-Luc Bertrand
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Malware infection possible on Cisco switches?

Are there any malware that target Cisco switches? I recently got one from a friend whose company threw them out after a ransomware attack, and are wondering if there is anything to be concerned about. Edit: model number is SG200-50.
Chris
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How can I make an ACL list work within a LAN?

I added an ACL list to Router A and permission is working fine if the packet comes from another LAN. The problem is, when a Packet is sent within the LAN that is connected to Router A, the packet is sent only to the switch (and doesn't reach the…
Manu922222
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Replace Cat5e with Fiber?

I have (2) LGS326P switches linked by one cat5e cable. I am considering replacing that cable with MM fiber but want to be sure it is worth the upgrade. Here is my setup in more detail.... House: (1) LGS326P switch 90% maxed Garage (1) LGS326P…
gable74
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Two switches one router

If i have one router connected to two switches separately (as shown in diagram), will a device on switch 1 be able to communicate with a device on switch 2. I would just like to make sure before i buy the switches.(any recommendations?) Thanks
Stanley Shearman
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Err-disable in Switch 2960

I have a problem. I have a Cisco 2960, this switch conect 23 Macs. The problem is that a pc puts the port in err-disable. When I put the command "show interfaces status err-disabled" the output is this: Port Name Status …
Joshua HG
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