+27 64 987 3021 [email protected] Mon-Fri 8:00-17:30 (SAST)
The two core switches cannot communicate with each other

The two core switches cannot communicate with each other

TH Photonics supplies ADSS/OPGW cables, 400G transceivers, OTDR, outdoor cabinets, and data center interconnect solutions for power grid and 5G networks.

Hot

Networking in vSAN: "Host cannot communicate with one or more other

The 3x VM Hosts are using “Management Network” standard switches (each with their own copy of it, respectively), but the physical Host uses “DSwitch-Management Network” and I

Dec 24, 2025
Inquiry Now
Hot

Troubleshooting VLAN and Switch Problems

Learn how to troubleshoot VLAN and switch problems in the first of this two-part series by Joe Rinehart. Video Tutorial.

Jun 16, 2026
Inquiry Now
Hot

Two linux boxes on same network cannot talk to each other

I have two Ubuntu machines that cannot talk to each other. They are sitting next to each other and are plugged into the same switch. They both have static IP addresses and have the same

Oct 08, 2025
Inquiry Now
Hot

Connecting multiple layer 3 switches together each with

Replace the layer 2 switches with layer 3 switches and configure them such that clients communicating from two different vlan on the same switch

Jan 18, 2026
Inquiry Now
Hot

Users in a VLAN Cannot Communicate with Each Other

Users in a VLAN cannot communicate with each other. Possible Causes This fault is commonly caused by one of the following: The link between users is faulty. The interfaces connected to the users are

Dec 19, 2025
Inquiry Now
Hot

Can VLANs with same no but on different switches communicate with each

If i have a VLAN (say VLAN 10) on switch 1 and again a VLAN 10 on switch 2. Can the hosts on these VLANS communicate with each other?

Nov 07, 2025
Inquiry Now
Hot

Why Devices on Different VLANs but on the Same

Therefore, even if devices share the same subnet, they cannot communicate across VLANs without routing, as each VLAN isolates network

Feb 06, 2026
Inquiry Now
Hot

Why Devices on Different VLANs but on the Same

With the growing demand for reliable and organized network infrastructure, VLANs have become essential for optimizing and securing

Feb 17, 2026
Inquiry Now
Hot

Why Devices on Different VLANs but on the Same

A common confusion arises when devices are on different VLANs but share the same IP subnet: they can''t communicate with each other. Learn why

Aug 30, 2025
Inquiry Now
Hot

Can''t communicate between VLANs

The VLANs are already built in the switches and on the trunk links between switches, including the link to port 4 on the MX? Besides that you need

Sep 11, 2025
Inquiry Now
Hot

Solved: Switches don''t talk to each other

We tried to connect two buildings using fiber cable. One building has Catalyst 3520 and other building has 3750. But they don''t talk to each other. To find out the problem, we bring these two

Sep 17, 2025
Inquiry Now
Hot

What to do if devices in the same VLAN fail to communicate with each

As is shown, two PCs with static IP addresses in the VLAN 10 cannot communicate with each other. The data packets need to pass three switches to be transmitted between the two PCs.

Sep 16, 2025
Inquiry Now
Hot

Network Switch Troubleshooting Guide: Common

A comprehensive switch troubleshooting from the physical layer to the data link layer to the network layer to find out why your network switch is not

Apr 20, 2026
Inquiry Now
Hot

Why two device on the same router cannot communicate to each other

So I tried to connect both of device into my old router and both of them can ping each other very smoothly. so is there any setting i should change on my new router to open access

Mar 14, 2026
Inquiry Now
Hot

Users in a VLAN Cannot Communicate with Each Other

If users in different VLANs cannot communicate with each other, rectify the fault according to the IP Forwarding Troubleshooting.

Sep 05, 2025
Inquiry Now
Hot

Best practices when configuring an Access switch stack to Core

Currently, the access switches physically connect to each other via fiber and only a few switches are directly connected to the Core stack. The firewall acts as the router.

May 25, 2026
Inquiry Now
Hot

My switches do not communicate

Hi everyone ! I have a problem with the communication between two switches, here is the simplified configuration: My PC1 and 3 cannot

Apr 18, 2026
Inquiry Now
Hot

Two VMs on the same VLAN or subnet cannot communicate with each other

Two VMs (VM1 and VM2) on the same VLAN or subnet cannot ping each other when hosted on different ESXi hosts. However, migrating VM2 to another host may allow VM1 to ping VM2.

Apr 09, 2026
Inquiry Now
Hot

Unable to ping between devices on the same VLAN

I now have a similar issue on some other devices as follows: There are several devices on a particular subnet, let''s say 10.10.43.0/24, and connected to the same switch, and they can

Jun 30, 2026
Inquiry Now
Hot

Inter-VLAN Routing: Connect VLAN-to-VLAN

This article provides a step-by-step walkthrough, including configuring VLANs on a Cisco switch, setting up trunk ports, creating router sub

Jul 04, 2025
Inquiry Now
Hot

Inter-VLAN Routing Configuration 2026 Guide

Clients on different VLANs need routing to communicate with each other (inter-VLAN communication). To make clients within separate broadcast

Jan 21, 2026
Inquiry Now
Hot

Unable to connect using Local Communication on Nintendo Switch

The information in this article can help you when: You''re attempting to play a multiplayer game using Local Communication and the consoles are unable to communicate with each other. You''re

Aug 13, 2025
Inquiry Now
Hot

Steps to Configure and Verify Interswitch Connectivity

PC1 and PC3 are not able to communicate because there is no Inter-switch connectivity. PC1 and PC4 are not able to communicate because of

Jan 06, 2026
Inquiry Now
Hot

Exam HPE6-A73 topic 1 question 61 discussion

Two AOS-CX switches are configured for VSX at the access layer, where servers attached to them. An SVI interface is configured for VLAN 10 and

Dec 14, 2025
Inquiry Now
Hot

Computers in an unmanaged switch cannot

TL;DR: I have > 2 computers in an un-managed switch which can''t communicate with one another i.e. can''t ping or ssh among one another. Long

Jul 09, 2025
Inquiry Now
Hot

Two switches connected but not talking

Just want to clarify which switches they are. The next work on the right can ping around the right side, but not reach the left. The left can ping around the Left side and reach the Cisco

Oct 11, 2025
Inquiry Now
Hot

communication

Traffic between endpoints does not have to pass through the root complex if there is a shorter route through the switches. Extra switches can be

Aug 24, 2025
Inquiry Now
Hot

Allowing Two vlans to communicate with each other?

@hakeem123 greetings, To allow different vlans to communicate to each other, you will need to enable routing in your multilayer switch using the following command: #ip routing But now all

Feb 10, 2026
Inquiry Now
Hot

How to configure two Core switches in a network with intervlan routing

Dear All, Hi Friends, i have two 3750 switches. I configured intervlan routing between three vlans which are vlan11,vlan12, and vlan13 in Core Switch1. These three vlans are communicate each

Oct 04, 2025
Inquiry Now
Hot

Computers in an unmanaged switch cannot

I''m kind of stumped as to why this is happening. Given that Switch is connected to my Router I''d figure that computers in the switch would be able to

Jul 14, 2025
Inquiry Now

Need Product Pricing?

Contact us for competitive quotes on any of our fiber optic products

Get a Quote