Questions tagged [switch]

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

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Connect 2 VLANs on the same layer 2 switch [closed]

I have looked a lot into this but nothing came up that suited. I want to connect vlan 1 with vlan 2 I have a d link router and a Netgear modem router that I can use if needed. Switch is a dell ...
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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 ...
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1answer
45 views

In virtual networking, how does a Virtual Switch differ from a linux kernel bridge?

I have seen that in virtual networking, guest VMs/containers can be connected with host and internet either by using kernel bridges(linux) or Virtual Switches. Example - Bridges docker uses linux ...
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20 views

Hyper-V Virtual Switch High Network Usage When Idle

Using Windows Server 2019, I have an External Virtual Switch created in Hyper-V Manager with physical Ethernet adapter selected. Problem is that the adapter is constantly showing high network usage ...
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2answers
657 views

When to use routers and when to use layer 3 switches

If you were to connect two buildings on the same site via fiber, what is best to use - routers or layer 3 switches? The layer two switches in each building have VLAN's, so these will either connect to ...
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1answer
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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 ...
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1answer
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Is the total bandwidth for a typical NIC / switch connection full duplex?

I have a standard consumer grade NIC and switch combination connected over cat 5e ethernet, that both support 1 Gbps operation. Is that simultanteous 1Gbps send and receive (full duplex) or is the ...
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1answer
39 views

Redundant L2 Uplink (OS10)

I am trying to design a redundant uplink to a service provider from a pair of Dell S4112 switches running OS10. We a getting two uplink connections from the service provider, but they cannot be ...
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4answers
80 views

What are the disadvantages if routers (layer 3) didn't existed? [closed]

I'm new to networking and I'm trying my best to understand some concepts. Therefore, if routers never existed and we had only layer 2 switches, what would be the problems that arise and cannot be ...
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1answer
45 views

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 ...
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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 ...
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1answer
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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 ...
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1answer
145 views

What variant of STP is implemented in the Linux kernel?

(moved to SF from NEng on moderator's request) We are developing some switch management software on top of Debian 10, Linux kernel 4.19. We are using Linux bridges (offloaded to proprietary hardware ...
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1answer
25 views

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 ...
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1answer
24 views

How to make old router as access point? [closed]

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 ...
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1answer
34 views

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 ...
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Layer 2 Broadcast filtering on VLAN? (Access ports on Cisco SG-500-52MP)

This is my first time setting up VLANs on a Cisco so I've probably made some mistakes - would appreciate some suggestions. Thank you in advance. ... From my understanding of switches, when a layer ...
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2answers
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Is it possible to apply firewall on LAN to LAN packets with just PfSense and a layer 2 switch?

Is it possible to apply firewall rules on LAN to LAN packets? Imagine the following architecture: To get a valid IP, the clients must authenticate to PfSense LAN network using 802.1x against the ...
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A single switch for multiple options of connection LAN, AP or direct ethernet access

I have a few ubuntu machines that I want to put on a switch. I want to access these machines via the following methods: LAN, this is as easy as plugging in the LAN cable to the switch AP, using one ...
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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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2answers
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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.
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1answer
30 views

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 ...
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155 views

Cisco switch extended ping

I'm trying to use the extended ping on a Cisco 2960-X switch. It's just plain not working for me! Basically, the whole point I'm using it is to have the source be a specific interface (or IP on that ...
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Fan failure alert appears after replacing fans in 3COM 5500G-EI

The Superstack switch has started be more and more noisy so I decided to replace the fans. After this I get constant changes in fan status, every 10s or so. From OK to failure and then back again to ...
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3answers
845 views

Connecting a NAS directly to a 4 port switch directly to two computers, offline?

I'm looking to purchase a portable NAS, say the Synology DS1019+ for example, to use as a shared storage drive between two workstations beside each other. There is no wired network access anywhere ...
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2answers
59 views

Tag/Trunk Cisco 350x

I am pretty new on the networking and cisco world. As far as I learned, tagging is just assigning a port to a vlan, and, as per definition, trunking is assigning a port to more than one vlan I am ...
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1answer
119 views

Ethernet patch or crossover router to router [closed]

I we have run Ethernet in the house, through a fast Ethernet switch, through a wall patch, over the river and through the woods as it were. From router A, through switch, through wall patch, then to ...
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HP ProCurve 2910al dual personality ports media type

I got my hands on a few HP ProCurve 2910al switches and they have 4 dual-personality ports (either rj45 or SPF module), and I need to force the switch to use rj45. The rj45 ports were working before, ...
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1answer
398 views

Troubleshooting Network Switching Connectivity

I am managing a network that sporadically has network outages that present as follows no TCP or ICMP traffic is working between any devices on the network. Two computers with valid ip addresses are ...
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1answer
203 views

How to fix DHCP server after main switch replacement

I am a computer science teacher in a small school who is getting to grips with a role as server/network admin. Today, we all lost internet connection and were unable to access the server remotely. It ...
2
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1answer
150 views

ProCurve 2910al-48G-PoE+ (J9148A) configuration

I'm (re-)configuring a ProCurve 2910al-48G-PoE+ (J9148A). Although I thought I had a reasonable understanding of routing etc, I've never done this with enterprise hardware. I can't seem to make the ...
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1answer
33 views

HPE J9265A 6600-24XG switches & java for the web interface?

Does the latest firmware for HPE J9265A 6600-24XG switches still require java for the web interface?
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1answer
120 views

VLAN not working on PFSense (SG 1100) with HP switch (HP E3500-48G-PoE yl)

Recently I bought a PFSense server (SG 1100) and a HP switch (HP E3500-48G-PoE yl). My idea is to create VLANs on the PFSense server, and use them on the connected HP switch. I have found a ...
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1answer
24 views

Cisco SG500X 10G-capable SFP+ port up at 1000Mbps

I am not an expert using SFP. I got a Cisco SG500X L3 switch with 4 SFP+ 10G ports. I got 2 mini-gbic HP AJ718A (8Gbps) and 1 fiber (HP 3PAR-10G-10M 850-200029 10Gbps). I plug the fiber into XG1 &...
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3answers
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I want extend CAT5 cable, more than 100m

I have a track like 130 meters. CAT5 cable limit is 100m. Is it possible to cut it in half and get a switch in the middle of the track? Will it work?
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1answer
61 views

A way to configure DMZ zone on Ethernet Mellanox Switch

Can't find any information is it possible at all and how to configure DMZ zone on Mellanox MSN2100 switch. If I setup ACL disabling traffic from DMZ to LAN, I can't receive response to requests made ...
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1answer
20 views

Opensense - Uses route but is directly connected

I have the following configuration: Network Architecture Router 1 (192.168.5.1/28) with Network 192.168.1.0/24 (Opensense) Router 2 (192.168.5.2/28) with Network 192.168.2.0/24 (PfSense) Server 192....
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How to mirror traffic on a tunnel interface to external switch?

I have a vpn tunnel interface in a VM. I somehow need to get this traffic to a switch for monitoring. I can attach some other physical interfaces to the VM but I don't know how to copy the traffic ...
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Web Access and broadcast issues for HP Switch V1810-48G, PK.1.40

I have some trouble with an HP Switch: HP V1810-48G PK.1.40 After few days after the reboot, its LAN webinterface becomes unaccessible, its IP address not pingable anymore and it starts to block some ...
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46 views

Routing managed switch VLAN to unmanaged switch

Setting up a network with UniFi routers, 2 access points for each router "public" and "private". I wanted to isolate them and from finding devices/ports on the private network. Do I require to use ...
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Mysql NDB with non stackable switch and teaming (Centos7)

My question concerns database, Linux and network. I have network latency and problems probably due to trunking & teaming issue when I try to add 2 more data nodes. Both 48ports switchs are ...
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0answers
61 views

NIC bonding on Linux in redundant network topology

I want to implement NIC bonding on Linux server in redundant network topology as shown in the network diagram below. Network topology Both interfaces of the Linux server fa0 and fa1 would be in one ...
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1answer
57 views

Switch seems to be allowing only one device

I have a simple 5 port switch which I recently connected to the ethernet jack in my office. There is a main cisco switch for the entire office lan. Anyway all my devices were connected, I could check ...
4
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1answer
73 views

Dropped large packets on VMWare

We have a strange issue in our network, which according to networkengineering.stackexchange is off-topic there, even though in my eyes it is a network problem. We saw it the first time when we ...
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2answers
70 views

Is there a command to physically identify a particular Allied Telesyn switch in a rack among multiple switches?

I have several identical older Allied Telesyn switches (model AT-FS8326) mounted in a rack without any labeling. I know their IP addresses and I have the access to their CLI over the SSH protocol. I ...
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1answer
44 views

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 ...
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2answers
66 views

Feasibility of having two independent subnetworks on interconnected switches

I have the following setup, using two standard cheap switches that are interconnected by a long Ethernet cable: |------ SWITCH #1 | [ ] Equipment with public IP 217.x.x.101 (subnet 217.x.x.96/29) | [ ...
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2answers
225 views

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. ...
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47 views

Does a Network-Switch changes TCP-Packages?

I am investigating a network issue, where our driver(s) under VxWorks7 is generating errors-messages like: "Notice: resend delayed, network driver has not finished the previous TX attempt on this ...
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1answer
239 views

Why Cisco port is not connected but other side come up

On my Cisco Catalyst 3850 there is a SFP Module which is connected to another device, the port on the Other device (vendor equipment) come up but my interface is still down. The DOM Information show ...

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