Questions tagged [switch]
a device that bridges network segments, operating at the OSI link layer level.
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Upgrade to gigabit switch made long cable stop working
We have two buildings connected by a 30m network cable with a switch on either end. Last week we upgraded some old equipment to support gigabit speeds. One of the two switches was an old 10/100 ...
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Several switches vs one switch for on LAN of 60 computers?
A. Is using one network switch is faster vs 3-4 network switches connected together in same room?
B. Is there difference in speed at all between cheap switch and more expensive model?
P.S. network ...
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Using Internal or External IP for File Transfers in Data Center?
I am pretty sure I know the answer to this, but 2 technical people in my organization cannot agree, so I'm putting this on ServerFault to get a final opinion.
We have a relatively simple set up in a ...
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Failover switch [closed]
I need a server / switch / something (which I'll refer to as a "failover switch") to do the following task.
There are two HTTP servers behind the failover switch.
Normally, all requests are routed ...
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Sharing a switch with both internal and external interfaces
I am wondering if it would be safe to setup my network with a single switch running both internal and external interfaces.
Currently I have a 255.255.255.240 block of IPs from the ISP and a 10.10.10....
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Decent 1gb switch (16-24 port) for rack
For a rack containing a smaller nubmer of servers (5 at the moment, going to stay in this area), I am looking to replace the currently aging 100Mbit switch with a 1Gb switch.
This is for the backend ...
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What to look for in a switch with LAN/WAN verses an iSCSI SAN?
I'm setting up a VMWare ESXi 5 environment with 3 server nodes. Dell recommended 2x Force10 S60 switches shared (iSCSI SAN, LAN/WAN). The S60 switches are extremely powerful. They have 1.25 GB of ...
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Physically switching between two network cables [closed]
I am looking for a small piece of hardware that will allow me to physically switch between two network cables, similar to how a KVM switch works. That is, there are two ethernet input cables to switch ...
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Local and public IPs on the same switch?
It's all pretty much in the title. Is it possible to assign both local and public IPs to different nodes connected to the same switch?
I have 4 servers with 2 gigabit ethernet ports each. I want ...
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Diagnosing and debugging LAN congestion / connection issues
What are the top N tools / methodologies used to diagnose and repair network issues?
Given a LAN, for example, where users are able to consistently ping an outside server, but any data intensive ...
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Configuring VLANs on HP 1910 switch
I understand how VLANs work, but am not quite sure what the various settings in my HP switch actually do.
I have an HP 1910 switch, and I'm using the web interface to configure it (personally I'd ...
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If a managed network switch were to overheat, would you consider it no longer reliable?
Here is the scenario - I have a network switch, one of several in a stack. It's fan failed. Soon, there were reports of users with network issues. After quickly replacing the fan, the users ...
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Determine switches between devices on LAN
I'm on a network where most devices are DHCP. If I have a few switches between device A and a DHCP server, how can I find out what they are?
traceroute just gives me 1 hop, regardless of the number ...
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What does 'Si' mean with respect to network switches?
I am seeing references to Multilayer Switches with Si as in the network symbol below.
What does the 'with Si' qualifier mean?
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Connecting Fiber interfaces on Cisco switches
I'm trying to replace an old Cisco Catalyst 2950 with a new Cisco 3750X. Unfortunately, these SFP's are so expensive, I'm trying to work with what I've got. Please note the diagram to see what ...
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Cutting down network noise on an industrial control network
I have an automation controller that has built in 10/100 networking and uses TCP or UDP for communication with its operator interface, monitoring, data logging and programming. I had a lot of problems ...
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How to calculate required switch speed based on network usage?
I have a 48 100Mbit/s port HP Procurve Switch 2610 (J9088A) that can handle 13.0 million PPS (packets per second) and features wire speed switching capacity at 17.6Gbps.
First off, what does that ...
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Add unmanaged switch to VLAN port
I have a situation where needed to create network within about 20 offices. Typically each office is rented by different company, but some of them has two or more rooms. So i have no idea how many and ...
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Can I have a class A and class B on same switch?
Is it possible to have both a class A and a class B network on the same switch?
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Managed Switch Question?
Guys sorry if this has been asked before. I did search. Actually reading on here has helped me learn a lot. I'm in the market for a managed switch. You might ask yourself why anyone would ever want a ...
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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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Does Gigabit degrade all ports to 100 megabit if there is a 100 megabit device attached?
Our company is buying some HP Procurve managed gigabit switches to replace some of our core switches. However, we aren't able to upgrade all of our switches from 100Mb to Gigabit switches. I think I ...
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ESX(i) Interface Bonding ala Linux?
I'm planning to virtualize some Linux hosts that I've got, and I'm going to be putting ESXi on the physical machines. Currently, I've got two switches set up for redundancy, and I've got bonding setup ...
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What is the proper way to connect cables from a patch panel to a switch when you have more ports on the patch panel than on the switch?
We're in a situation at our new building where we have 58 drops but only 48 ports on our switch. Roughly 40 of our drops will be in use, but it's a random selection ranging from 1 to 58.
Typically I ...
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LAN segregation for security reasons using VLAN
I was asked to segregate the testing environment in our network to improve our security.
Our structure includes:
1 switch Dell Power Connect 3448
1 switch Dell Power Connect 2748
A few 5 ports Star ...
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2
answers
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Linux bridge redundancy
I make heavy use of Linux Bridges (brctl) as I have a Xen environment. At the minute, only one physical NIC is connected to the bridge (There are many virtual NICs for the Xen VMs though). In order to ...
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Cisco SG200-26 - Can't change management VLAN
I've purchased a new SG200-26 switch and upgraded it to the newest possible version:
I configured multiple VLANs - nothing special - however if I try now to change the management VLAN (as I did ...
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Massive packet duplication
Short Version:
We've had a problem with a particular server receiving massive duplicates of packets. After much fault finding we found the problem was caused by a switch sending my packet out every ...
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Is there a way to pass VLAN tagged frames through managed switch?
I currently have a managed switch (DGS-3120-24SC) configured for private VLANs (secondary and primary port groups). Secondary ports are isolated from each other and forwarding is not possible between ...
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HP Procurve 2512/2524 protected port, source port filter or similar?
HP Procurve switches usually have a setting so that the ports are told which other ports they can communicate with. An easy setup using this is to only allow communication with the uplink, so that no ...
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Appropriate Network switch for small server cluster
Need to build a small business server cluster for the purpose of crunching data. It will not host a web site that needs to be available 24/7.
It does need to support servers that host Redis, a ...
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Should I limit end-user gigabit ports to avoid saturating uplink/trunk connections?
We have a campus with 16 buildings and older 850nm 1Gbps fiber links between the buildings, that all come to a core switch for our servers that also uses 1Gbps ports. We're finally starting to replace ...
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Stack Switch Failure Check using Nagios
We have a Cisco 2960S series switch which is a stacked switch with multiple physical switches managed as a single unit. A single management IP is assigned to the entire stacked switch.
Therefore, if ...
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pfsense port-security limit mac to 1 (any mac allowed)
I am trying to set up HP procurve routers (25xx and 26xx) with port-security. Goal is to allow client devices and routers. But to disallow a switch, AP or a router in bridge mode. This should be ...
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VLAN ACLs and when to go Layer 3
I want to:
a) segment several departments into VLANs with the hopes of restricting access between them completely (Sales never needs to talk to Support's workstations or printers and vice-versa) or ...
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Cisco FC SAN switch decision
I've got to buy a bunch of FC SAN switches in the next week or so, I have to, and want to, buy Cisco MDSs.
Servers are HP BL490c G6's in C7000 chassis with Virtual-Connect Flex-10 ethernet ...
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Network card or wiring causing physical damage to a switch?
About two weeks ago I replaced a switch because it had spawned a number of bad ports over the last year. Now, the new switch also has failing ports. Of course I'm looking into the environment. I've ...
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How do I reset this switch so I can use it?
I bought a used 24 port Enterasys VH-2402S fast Ethernet switch at a government surplus warehouse for use at a small private school.
After researching, I found that it is a level 2 and level 3 ...
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inter VLAN routing with Ubuntu
I have 4 VLANs created and I'm trying to use my Ubuntu machine as the DNS,DHCP, and L3 router. I want my 4 VLANs separated but still able to talk each other. Here is a bit about my setup.
Cable ...
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Linux server reboot brings down LAN network
I have a strange problem in my office network.
I have a physical server which runs ESXi 4. Every time I reboot a linux virtual machine (Ubuntu Server 12.04.1 LTS) the entire LAN network goes down. ...
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What would cause a PBX or SIP phone to not register on the network when using Netgear Switches?
We have 3 different types of switches in our network.
All of our IP Phones are running on HP 2520-24 PoE switches.
Our primary backbone is "supposed to be" running on Netgear GS748T switches.
...
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Configuring Sonicwall to route VLAN traffic to internet
I have a Sonicwall NSA 2400 that had its configuration reset and I'm having trouble reconfiguring it.
The Sonicwall's WAN port (X1) connects to the internet. Its LAN port (X0) connects to a 3Com ...
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will heavy network traffic affect other connections on HP ProCurve V1810-48G?
I have a HP ProCurve V1810-48G switch with a few servers running Citrix XenServer connected to it (everything in one rack). The switch is almost in its default configuration (no VLAN, no port ...
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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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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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Am I understanding right about linux bonding and switch?
If there are one server and one switch, if the switch dies, service on the server down.
So there are normally two switches, and the server should be connected to the two switches, therefore there ...
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How to fix an aborted firmware upgrade on Cisco SLM2048
There is a Cisco SLM2048 switch and the last firmware upgrade aborted, now the switch doesn't work anymore. I can't access the switch. The only evidence is a blinking system LED. As the switch doesn't ...
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Inexplicable STP Behaviour
I have a problem with a couple of Dell PowerConnect 6248 switches (latest firmware) connected to a pair of external (3rd party) switches providing Internet connectivity via HSRP.
I'll post more ...
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Should the MAC Tables on a switch Stack be the same between sessions?
According to Cisco's documentation:
"The MAC address tables on all stack members are synchronized. At any
given time, each stack member has the same copy of the address tables
for each VLAN."
...
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Network hanging, switch lighting up like crazy
I have a switch on which all the network lights are going crazy on and none of the systems have network access or internet access. Below is my detailed configuration. I have 2 routers (DLink and ...
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