Questions tagged [switch]
a device that bridges network segments, operating at the OSI link layer level.
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Bonding on centos only and switch without LAG enabled vs Bonding on centos and swtich with LAG enabled
I am a little confused on Bonding on Centos side and Link aggregation on netgear switch side. Would mean a lot if someone can clear it out.
Using switch Netgear XS708E which does not support IEEE 802....
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How to set the mode of port? access, trunk, general
I tried to set (change) the mode of my port, and I read the book and followed it step by step. But I still get a lot of error.
There were what I input.
(Routing) (Interface 0/3)#switchport mode ...
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Cisco Catalyst 3750G series PoE-48 - Private VLAN
I'm working on a Cisco Configuration for the first time and I've run into a problem where the Vlans do not appear to be working correctly, the ports on the switch should be configured to the ...
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sendip IPv6 ICMP ff02::16
I would like to send the following packet out with the sendip program (or any other program):
IPv6, destination address: FF02::16, source address: (mine)
ICMPv6, type: 143 (Multicast Listener Report ...
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Weird networking behavior with a gateway between a switch and CMC module, on Dell VRTX equipment. Am I doing something wrong?
Network Diagram:
Here's the simplest way I know how to explain how the internal networking of this Dell VRTX works.
So, you have your 4 blades and your network switch module that have integrated ...
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Cisco STP with SG550
I have created a lab connecting 4 switches like in the topology below to test a STP with cisco sg550xg, but somehow it's creating storm and gives me this error
1y22w: %SW_MATM-4-MACFLAP_NOTIF: Host ...
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Required switch per building
Conventions:
- Building: Called building, in fact it is a container (used for shipment 42ftx8ft).
The scenario:
- There are 4 buildings installed on the ground, separated between 32ft(10m) and 49ft(...
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cisco sg550 radius configuration
We have cisco sg550xg switch where we first saw how to configure cisco via GUI, and long story short we got stuck on radius. From what we found on manuals we add a new radius client with server ip ...
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Can't Get Cisco Switch SG300 to More Than 100M Half
I have a Cisco SG300-10SFP switch which I purchased just 6 months ago. I had intended to use it as a hub for a fiber network on our premises. It has 8 SFP ports and two Ethernet ports (all 1000M). I ...
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Port security and active directory
I'm using RADIUS for port security in my environment on publicly accessible ports (meeting rooms, etc.) We have HP Procurve switches and Aruba Clearpass is handling the authentication requests (with ...
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A looped hub connected to a switch
---- We don't want to block the use of Hubs ---
If two switches are connected to each other via a hub, STP detects and blocks alternate link (if available).
But if a hub is connected to even one (...
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Can Cisco switches block Fluke network testers
I have two Fluke NetTool Series II network testers, and both network testers are showing extremely erratic behavior while connected to a new Cisco switch. I'll try to describe the behavior below. I'...
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HP Comware 5500 interface status history
How can I check an interface status history (how long a port is down for ?) on a HP 5500 switch?
I can have the current status, but want to know history, to track "real" unused ports.
Thanks for ...
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Procurve Inter VLAN Routing
I have a VLAN routing issue on our network. We have two ProCurve 5406zl's being used as our core switches, each vlan on these switches has an IP address and VRRP is configured on each vlan for ...
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2 VLANs between four switches
I am having a problem that I do not quite understand with my network setup.
I have four switches on the network: Switch A is a managed network switch which is connected to the PC router -- it is set ...
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More Management VLANS for a switch
I created a management interface in vlan 99 to telnet the switch (2900 series). I also wanted to configure another management interface for the same switch from the computer belongs to the different ...
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VLANs with mixed MTUs trunked over a LAG
I'm contemplating enabling Jumbo frames for a specific network/VLAN (a dedicated storage network). Ports are spread across two switches, linked together using a LAG, which is configured to carry all ...
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Set a upper bandwidth limit for Infiniband HCAs
I have to deal with PCIe congestion and I need to find a way to reduce PCIe traffic. I get several IB cards in one node (among other PCIe devices). HCAs are FDR Infiniband.
Putting those HCAs in FDR-...
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How should I use Cisco ASA 5510 and Catalyst 3550 together
So I took on a project at my job moving four separate networks into one Colo center.
Currently I broken everything down from the four networks into 4 VLANS on the ASA 5510. Each are assigned IPs ...
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Configure Cisco QoS for VLAN
I have two VLANs (20 and 21) that are accessing the same resource on a switch. Clients on VLAN 20 access this resource only at schedule times, but when they do, they generate lots of traffic as they'...
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Zabbix drops in SNMP from Cisco SG200 switch
I'm using Zabbix 3.0 to monitor our main switch in which the port from the firewall as well as other ports show what appear to be drops of either sending or receiving. One would conclude that if this ...
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Manage Windows Server 2012 and trunk the Hyper-V VM (same physical NIC)
I'm trying to use Hyper-V to deploy a pfSENSE box inside of it.
But, the scenario is:
3 VLANs
VID: 1000
VID: 2000
VID: 3000
On a physical switch port, I've tagged the Server physical port with ...
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Difference between VPI and VCI in ATM
I don't really understand the difference, neither the necessity of including two fields (VCI and VPI) in asynchronous transfer mode. As far as I understand the main difference between a virtual path ...
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DHCP Server Port-Based Address Allocation on Cisco switch 2960-x
I am trying to configure DHCP Server on a Cisco 2960-X switch to achieve port-based address allocation. I would like the IP address assigned to any device connected to that port to be the same every ...
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limited connectivity at end nodes
I am running a campus wide network of a University and experienced a very unusual scenario for my network. The problem is two folds and therefore i would like to explain that separately after briefly ...
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657
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How to implement lacp cross switches
I have a question of lacp on Cisco 2960x.
Are they in the same group "1" or not? isolated?
Lab setting:
Server-4pt (linux) -> sw1 channel-group "1"
Gi0/1-2
Server-4pt (linux)...
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Connecting 2 single switches to a stack
I have a core switch made with 2 stacked Cisco SG500XG-8F8T switches.
Now I have to connect 2 3Com Baseline Switch 2920-SFP Plus to extend my gigabit network, but they are not stacked. So I connected ...
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CentOS, 4 NICs: two teams redandant, each team has 2 NICs, is it possible?
We have one CentOS7 or RedHat 7 "BIG" HP Proliant DL360 Gen 9 server with 4 NICs, two external switches Switch 1 and Switch 2 and many "small" servers.
Those small servers have two NICs: those NICs ...
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burnt Switches connected directly to the internet
We got a setup with a switch between the cable modem/bridge and the two router ports.
We burn this switch every 6 months, and it has to be replaced.
Symptoms are heavy packet loss or in general very ...
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Setting up a small network with a redundant WAN setup
Asked on the network stack but referred here, partly because lower grade equipment.
Small office and we are trying to piece together a network with our two wans (diff ISPs) a switch and a few ...
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Dell PowerConnect Link Aggregation Failover Failed
We are a small office with two Dell PowerConnect 5548 switches that, together, cover all of our servers and hosts. I had them connected using ports 47 and 48, which I placed in a LAG. Port 47 was ...
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Setting up VLANs using GS724T & Draytek 2860n-Plus
I am having a world of problems here and can't see what is going wrong!
The Plan:
Use the Draytek to connect to the internet and provide WLAN access.
Single port to connect to the GS724T and tag ...
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Why don't TP-Link 24x-switches propagate clients when cascaded in two?
I'm behind two TP-Link switches those are cascaded behind a TP-Link router, which is in turn behind a consumer router that works as in modem only mode.
Clients connected to the first switch work ...
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HP 5120 vlan not working
So I have this odd issue with our HP 5120 switches. The VLANs will not pass traffic unless a interface with a IP is assigned to the VLAN. Problem is there is a limit of 8 VLAN interfaces that are ...
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Measuring latency with switch and identifying flow path
I have two machines, A and B, connected via switch S1(master) and s2(slave). I want to measure latency and identify packet flow path from machine A to Switch,switch to machine B. If the link between ...
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DRAYTEK - VLANs with VLAN tagging switches / router
Our company uses Draytek routers (various models, slowly upgrading to 2860n at each site).
We have recently purchased a new site, and want to split the network up into separate VLANs, so as to ...
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Windows mounted network drives slow after upgrading switch
On our small business network our old 10/100 consumer grade switch gave up the ghost, and we replaced it with a proper business-grade gigabyte switch. After wiring it in our Linux and Mac users ...
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Connecting internet uplink to switch or firewall
While I am using Cisco kit, this isn't really Cisco related, more general network design.
In the past I have connected internet connections straight in to a layer 3 core switch, 3750X's, 6509's and ...
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Routing between L2 isolated ports
I am to deploy some managed switches for FTTB/FTTH and preparing configuration to introduce isolation between customers (by disabling L2 forwarding between client ports or using private VLANs). ...
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Backup slowness after changing the SAN switch
We have a netbackup environment
Recently we changed the connectivity of two of our sql servers(cluster servers) from one SAN switch(MDS 9509) to another (MDS 9513) followed by which we are ...
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why do I lose ping to a machine when using port mirroring / monitoring (sniffing)?
I am using port mirroring / monitoring in my 3COM layer 3 switches to look at network traffic (using wireshark).
Sometimes, I have found that I loose connectivity with the remote monitor machine (...
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Juniper 802.3ad Link between Switch and Router 3x link issue
We have a live 20Gbps link between our switch and router and we are trying to add another 10Gbps link to the LAG, we've changed all the settings on both end to add the third interface to the LAG yet ...
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Cisco Auto Smartports on catalyst 2960-s
I have Cisco Catalyst 2960-s, I want to configure user defined macros on it. I searched a lot in Cisco documentation but its not for beginners :(
How to create a user defined macro that runs when a ...
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IGMP 2.0 snooping switch timeout
Suppose a host computer has joined a multicast group 239.0.0.50 via IGMP 2.0. As per the IGMP 2.0 spec, when the host computer receives either a general query on 224.0.0.1 or a group wide query on ...
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Cisco vlan entry missing in vlan.dat, but appears in running-config
One of our vlan's (ID: 104) stopped working suddenly and computers on that vlan failed when trying to obtain a dhcp ip address.
On the Cisco switch if we do show vlan, this command is supposed to ...
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Is the Foundry BR-FGS624P switch stackable by adding the 10GbE ports, or is it never stackable?
I'm looking at buying a Foundary BR-FGS624P 24 port switch which will suit our purposes now, but thinking into the future I might like to stack the switch when we add a few more servers to our rack.
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Tool to parse Dell PowerConnect switch configs to make them more readable and diff friendly
I've been working with many Dell PowerConnect switch configurations over the years, and even though their configuration console is quite IOS like, it doesn't manage configuration statements the same ...
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How can I use multiple NICs on Windows Server 2008 function as a switch
I have a win2008 Server with 4 network ports (A,B,C and D) where only 1 port A is connected to the LAN (192.168.0.0/24). The other 3 ports (B,C and D) are not in use.
I have another PC want to join ...
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HP E3800 switch to switch LACP connection dropping
I have a problem with 2 sets of stacked (2 switches in each stack) HP E3800 48 port switches. One set of stacked switches per rack for a total of 4 switches. I have a 4 port static LACP connection ...
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Cisco 2950 Express Setup
I've been donated a Cisco Catalyst 2950 Switch by the company I work for to have a play with.
I've reset it back to Factory Defaults, but having an issue with getting to Express Setup.
I've followed ...
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