Questions tagged [switch]
For questions about network switches, the term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model.
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Problem with ethernet connection through wall socket - ( Router -> Switch -> Laptops) [closed]
I am new to this forum and I hope that I will get the help that I need.
I am setting up my home network which looks like this:
So I want to connect a router through a switch to all the wall ethernet ...
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Setting up a local network with access to the internet through a wireless access point
Intro
At work we want to setup an 8 node raspberry pi cluster. The purpose of the cluster is to test different technologies and have a good time.
We cant manage the wifi at work and the only way we ...
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What are the reasons for seeing an incomplete ARP?
As was mentioned in this post:
The reason for seeing an incomplete ARP is that "An ARP request was sent for that address, but the host with that address is not up and running on the LAN, so there is ...
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Are integrated networking devices, frequently called routers, of the switch type or of a router / NIC type?
Odom,Wendell-_CCNA_200-301_Official_Cert_Guide,_Volume_1.pdf :
many SOHO Ethernet LANs today combine the router and switch into a single device. Vendors sell consumer-grade
integrated networking ...
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Duplicated Vlan ID
I have one flat network with our data center and it is causing as a lot of issues, so i had to design a new network to separate the buildings from the data center, when I designed the new network i ...
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Why is routing not working on my Dell N2048 switch
I am in the process of replacing some older Dell Powerconnect switches with a some Dell N2048 switches. While doing this I wanted to go ahead and segregate certain areas of my network using VLANs. ...
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dot1q L3 router sub-interfaces and L2 switch ports
I have a router with multiple L3 sub-interfaces. On the other side I have a L3 switch (Nexus 9K) that I'd like to have multiple hosts that are on the switch route their traffic to one of the router ...
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Interface is down/down but internet works
I am managing a network at my company. A patch panel provides connections to the switch, which is connected to the router.
One of the connections on the switch does not display a blinking green light. ...
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Colocation Rack Networking
I'm a sysadmin tasked with finding a managed service provider or networking contractor to build out our new colo space networking. I'm hoping to get some input to make sure I don't sound like an idiot ...
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Switch ping to router with trunk port
If I have a switch port trunk directly connect to a router with the follow scenario below:
-------- g1/0/1 (Trunk) g1/0/1 |------|
|switch| Native VLAN 1 SVI=...
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How to solve problem with two devices with the same MAC address, connected to the switch?
I have two devices with the same MAC address (don't ask why, I can't solve it by replacing those devices or modifying MACs) connected to one switch. Of course both of them get the same IP from DHCP ...
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HP 6125XLG switch in IRF not passing traffic on standby switch
I have HP 6125XLG switches in HP c7000 chassis. I have setup for IRF config (similar to Cisco vPC). I have configured all my blades in LACP active-active and everything works fine. But one of blade I ...
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Cisco port channel identification through SNMP
on a cisco switch is there any way to identify, through SNMP queries, which interfaces are involved and configured in a port channel?
I did some experiment with commons MIB, without result.
Any idea?
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Cisco VLAN Taking up Entire Subnet
I have a default vlan 1 that has an IP configuration of 10.20.11.0 with a subnet mask of 255.255.255.0.
I have an AP 10.20.11.55 that I want to place on its own VLAN because I intend to make this AP ...
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what's the difference between tag-based and Port-based VLAN and which one is better?
what's the difference between tag-based and Port-based VLAN and which one is better ?
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Why my high speed UDP transmitter send package to all devices after being disconnected from the server?
Here is my network configuration:
My Embedded board(192.168.124.249) sends a 16-byte UDP packet to my PC2(192.168.124.10) each 1ms.
Here is my PC2 received data:
Everything works fine until I ...
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Cisco 3560G not passing IPv6 RA when VLAN without IPv6 address
Problem:
When having VLAN without IPv6 address on L3 enabled switch, no RA is passed through VLAN unless there is IPv6 address assigned to the VLAN. Static assigments however are reachable fine.
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Can anyone explain the introduction of Rapid Dual Homing to me?what is the main function of rapid dual homing?
I read some information about Rapid Dual Homing from JetNet 5020G,the figure below is the introduction of Rapid Dual Homing.
Honestly,i don't understand why can the rapid dual homing have multiple ...
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Login local , login synchronous
I dont understand what those two comands mean when im enabling ssh
on Vty-line.
Can someone please explaim me please whatthose comand do and why i need to use them?
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Connecting a hub to my switch bypasses RADIUS/802.1X
I have set up a windows nps server (radius), it works with eap-tls.
In the switch when the authentication is validated the port is passed in vlan 100 and when it is refused it is passed in vlan 101.
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Cisco switch ios update without change license
I need the following ios switches to be updated to the latest "license-free" version to fix vulnerabilities:
C3560CX-12pd-S
C3650-48PS-E
C3850-12S-E
C3850-24T-E
C3850-12S
I didn't find any ...
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Direct connection slower than via switch
My office ISP provides a 1 GBPS connection. When I connect my laptop directly to the router provided by the ISP, and connect to fast.com, I get a speed of approximately 100 mbps.
Our office network is ...
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Cisco nexus 9336-FX2 ETHPORT-5-IF_DOWN_LINK_FAILURE
I am seeing following error on 100G interface. (SFP bought from fs.com)
nxos version 9.3.10
2023 Oct 11 00:41:12 spine-1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/4 is down (Link failure)
...
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Managed Switch, Setting up VLAN Tagged, Untagged, allowed & tagged only etc
Looking for some help setting up a Dell PowerConnect 2724. 1st time setting one of these up.
The best graphic I could find to explain my setup:
My router DHCP is enabled so it will provide IP ...
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Layer 3 switch SVI and static ip confusion
I have not configured the network yet. Every vlan will have a different subnet. I want to assign ip addresses to the switches on the network from another subnet. How can i provide a default gateway ...
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How FDB (Filtering Database) is filled out
I would like to understand what is used as a VLAN column in the FDB. For ACCESS port it is PVID if frame untagged or frame VID if frame is tagged, for TRUNK it is allowed VLANs?
We can represent the ...
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How do you assign sequential IP addresses to individual ports on a switch? [duplicate]
I am looking for a non-complicated way to set up a network of 50 interchangeable devices such that whenever I plug a device into a specific port on a switch, I will always get the same IP address ...
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HP ProCurve Switch 4100 series - Checking PSU status & S/N from the CLI
Do you know if there is any CLI command available on the very old HPE Procurve 4108gl/J4865A switches where you can see how many PSUs are installed in the chassis, what's their current status and ...
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J9450A HP 1810-24G Switch firmware upgrade
I'm trying to upgrade the firmware on my J9450A HP 1810-24G Switch, which presently has firmware P.1.6, eCos-2.0
The firmware-update-for-an-1810 question is out there on the internet, but the ...
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How to block telnet access for one particular network from all networks except one using Extended ACL
Scenerio is given in the picture. I want to block all the networks except 192.168.5.128/25 from doing telnet of 192.168.5.0/25.
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How does a switch learn a switch table?
Say the switch table is empty. If computer A sends a frame destined to computer B, the switch will broadcast asking who has the MAC address of B. What if C suddenly sends a frame to A? What is the ...
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Layer 3 Switch IP Problem on Packet Tracer
I set up a network. It contains vlans. I assigned devices ip addresses from different subnets. I have 2 layer 3 switches to communicate them. I assigned switches ip addresses from different subnet. I ...
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Is there an equivalent of the Cisco/ Cisco esque command "ip helper-address a.b.c.d" on Mellanox switches?
Apologies for my newbie question. I have recently had a Mellanox switch added to the mix. I was using an "IP helper-address" to forward DHCP requests in different VLANs to my DHCP server(s) ...
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How to get all the device information between two devices
I've two devices: My-PC and Another-PC.
The two devices are connected to a switch, which is connected to main switch with-in the same LAN.
My question is: how do I get all the device information ...
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Configuration recovery on Extreme Networks Summit 200
I need to upgrade a small network I know nothing about.
The only manageable switch in an Extreme Networks Summit 200, running ExtremeWare 7.3 (from 2005!). Of course, the default admin password has ...
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Inter-VLAN using L3 switch
There are 3 VLANs 10, 20 and 30 on these switchs. Everything such as VTP, DTP are working fine. The problem is that inter-VLAN seems not to work correctly. IP routing is activated on the L3SW (even ...
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6125XLG blade switch IRF configuration in c7000 chassis
I have HPE c7000 chassis with 612XLG switches. I am trying to setup IRF between blades switches. somehow i am not able to bring up irf-port interface.
In 6125XGL TE1/0/17-20 ports are internal ...
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How do layer 2 switches route based on MAC when daisy-chained?
Trying to think about this from a hardware design perspective, if I had to design an FPGA or a uC or something to manage a single port being the gateway port and one or more switched ports for routing,...
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RMA'ed device configuration [closed]
Just wondering what are the methods that you use when re-configuring an RMA'ed device.
Do you manually configured all the script that runs on the device or is there any efficient ways configuring the ...
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Can wrong SFP module damage equipment?
SFP modules convert electrical data from the equipment to optical signals. There is no incoming power surging from an optical port to damage the equipment according to my undarstanding of fibre optics....
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100 Mbps vs 1 Gbps in a network
I have a network with an older HP 1400-24G un-managed switch. A while back I noticed that backup for a SQL server database took 15 minutes. Using the performance monitor I found the Ethernet ...
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Brocade 7450 - set MTU to 9000
I have brocade icx 7450.
I already enabled jumbo frames to increase MTU packets on switch.
But unfortunately I am not able to change MTU size of port which I want. When typing after choosing interface ...
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Switches in chain topology for ~40 devices
I am currently looking at a network topology consisting of ~40 DUTs. In this network, there is no hierarchy (like access core and distribution), and all the switches are connected in chain topology. ...
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input discards on Arista 7124SX-F
im seeing input discards on one of our uplink on Arista SW
if i run sh platform fm4000 interface ethernet 22 counters verbose command it is showing smp0DropPkts which is equal to the input discards.
...
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Dividing a network into subnets using a router
I am learning about how L3 and IPv4 addressing works and I need some clarity on certain things.
I've encountered the following topology
So in this topology, the router stands in the center and ...
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Can we have two logging source-interface configured on Cisco Switch?
I would like to understand if its possible for us to have two logging source-interface configured on Cisco Switch:
logging source-interface vlan1 (For syslogs)
logging source-interface vlan2 (For ...
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How to connect 3rd party SFP to the cisco switch?
I am trying to connect "sfp-1ge-fe-e-t" sfp module to CISCO Catalyst C3560G-48TS switch.
When i pluged module to the port and following error was shown:
%GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: ...
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Switch Configuration - Change the trunk allow VLAN
May i know any service interruption if i issue the command on changing the trunk allowed vlan on both end:
switchport trunk allowed vlan 10, 20, 30 to switchport trunk allow vlan 10, 20, 30, 40
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enable https on Dell Networking N1548P
I am trying to enable https and disable http to make dell more secure. I am trying to generate self-sign certificate with these commands and having this error.
(config)#crypto certificate 1 generate
(...
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Does an SDN Controller need to be connected to every Openflow enabled Switch directly? [closed]
Is it possible that the network would still function if the SDN Controller was only connected to one Openflow Switch and every other Openflow switch would be connected to that switch someway?
And if ...
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