Discover common mistakes in switch port configuration and learn best practices to avoid them for a more reliable, secure, and efficient network.
Learn how to troubleshoot VLAN and switch problems in the first of this two-part series by Joe Rinehart. Video Tutorial.
This article explains how to create Virtual LAN. Which is we need to put subnets into our switched environments.
Learn to configure Port ACLs (PACLs) and VLAN ACLs (VACLs) in Cisco IOS Release 12.2SX. Secure your network with this configuration guide.
Enable Trunking: On a Cisco switch, enter the interface mode and use the command switchport mode trunk to enable trunking on a port. Specify
You can assign a static-access port to a VLAN without having VTP globally propagate VLAN configuration information by disabling VTP (VTP transparent mode). If you assign an interface
Trunk port — A port that is capable of carrying traffic for any or all the VLANs that are accessible by a specific switch. This article aims to show you
If your Cisco switch VLAN is not working, the issue usually stems from a missing database entry, an incorrect port assignment, or strict trunk
Access port — A port that carries traffic only to and from the specific VLAN assigned to it. Trunk port — A port that is capable of carrying traffic for
This article provides instructions on how to configure the VLAN mapping settings on Sx350, SG350X, and Sx550X Series Switches.
This article offers practical tips and solutions for VLAN troubleshooting, including how to verify VLAN tagging, and check trunk ports.
This article provides instructions on how to configure an interface VLAN as an access or trunk port on your switch through the CLI.
Use these steps to configure the VLAN settings: Click VLAN Management > Interface Settings. Select an interface type (Port or LAG), and click Go. Ports or LAGs and their VLAN
Use these VLAN troubleshooting steps to evaluate the symptoms of a VLAN issue and determine how to fix the problem.
Master configuring VLANs on Cisco switches. Learn to configure Access and Trunk ports, and Native VLANs and Allowed VLAN Lists. Learn to verify with show
These ports are typically placed in “access” mode to carry traffic for a single VLAN. Below are common issues that arise with switchport mode access
In the example above, all access ports in the topology, which include PC connections to S2 and S2, are configured in access mode and assigned to
Incorrect configurations of the virtual portgroups and physical switch ports can cause connectivity issues between VLANs. Data path issues (i.e. the physical network uses multiple
Note: Switch ports configured for 802.1x are exempt from this requirement. If there are any access switch ports not in use and not in an inactive VLAN, this is a finding.
Disable Unused Ports: Disable all switch ports that are not in use, effectively reducing the number of entry points an attacker might exploit.
The common problem is VLAN 1 can access internet but other VLANs can''t access internet, in this case if you apply EIGRP routing in both Cisco router and in cisco
VLANs serve two major functions: splitting up one switch into smaller virtual-switches, and extending those virtual-switches to other physical switches.
Chapter Description In this sample chapter from CCNA 200-301 Official Cert Guide, Volume 1, Wendell Odom discusses the configuration and verification steps related to three methods of routing between
What we have to do is we have to associate a switch port with that particular VLAN. We go to the interface configuration mode, interface FastEthernet 0/2 in this
Incorrect VLAN settings can cause traffic disruptions, unauthorized access, and inefficient network performance. This guide will help you identify and fix VLAN
It is possible that a disabled port that is assigned to a user or management VLAN becomes enabled by accident or by an attacker and as a result gains access to that VLAN as a
This tutorial explains VLAN configuration commands. Learn how to configure, test, and verify VLANs on Cisco switches.
Article ID:5306 Assign an Interface VLAN as an Access or Trunk Port on a Switch Objectives Virtual Local Area Network (VLAN) is a group of ports that enables devices to
This section summarizes the concept of ports in a Layer 3 switch.Imagine the association of the virtual router, VLAN, and port inside a Layer 3 switch.
Improper VLAN setup can lead to security breaches or unwanted data leaks between VLANs. To maintain strict separation, regularly audit VLAN
See the Cisco Nexus 9000 Series NX-OS Interfaces Configuration Guide, for information on assigning Layer 2 interfaces to VLANs (access or trunk
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