Core switch found all IPs

PINO OPTICS delivers premium fiber optic cables, adapters, distribution boxes, PLC splitters, QSFP transceivers, industrial switches and power systems for FTTH, PON, campus and carrier networks.

Latest Updates
Jan 06, 2026

Useful Cisco Switch Verification Commands

These commands give you general details about your switch, like the software it is running, how long it has been powered on, and what hardware is installed. Operating system (IOS) version, uptime,

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Latest Updates
May 09, 2026

Internet not reaching Core/Access Switch

Router has internet but Core Switch not picking, what i''m i missing? Router and Switch can ping each other Router Configs Router#sh run Building configuration... Current configuration :

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Latest Updates
Mar 01, 2026

Core to access switch ping working and access to core is not pinging

you are not able to ping CORE to Access switch - may be using default ip to ping try using source vlan 103 ? how is your routing configured on Core and Access switch ? Look for me

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Latest Updates
Aug 26, 2025

HP/Aruba 5406 reports duplicate IPs when I connect another edge

When I try connecting an edge switch on our netowrk, our core switch - HP/Aruba 5406 - shows multiple duplicate IP detected messages on various VLANs. The dupe IPs are the gateway addresses for

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Latest Updates
Oct 30, 2025

Rejecting duplicate static IP addresses on core switch

Currently, we are implementing static IP addressing for our clients to easily identify them for troubleshooting purposes. Is there a possible way to reject duplicate static IP addresses on our

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Latest Updates
Nov 27, 2025

Access switches can ping endpoint, core cannot.

Layer 3 Core switch with single fiber trunk ports heading out to multiple Layer 2 access/idf switches. Hosts connected to various access/idf switches are complaining about loosing

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Latest Updates
Dec 18, 2025

Check all the active IP addresses on a switch

IP is a layer-3 protocol, and IP addresses are in the packet

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Latest Updates
Jan 11, 2026

Finding IP addresses of Switches and Wireless Lan Controller

Go to the Cisco website and download any utilities that manage, or locate the devices. Unless set up when set in place, most switches do not have a management IP anymore once

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Latest Updates
Oct 13, 2025

What is a Core Switch?

What is a Core Switch? A Deep Dive A core switch is the backbone of a network, providing high-speed switching for data packets between different network segments; essentially, it''s

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Latest Updates
Jun 05, 2026

Core Switches: The Pillar of Network Infrastructure

Get a closer look at core switches: the nerve centers of network infrastructure that enhance performance and facilitate growth.

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Latest Updates
Jan 08, 2026

Finding IP addresses of Switches and Wireless Lan Controller

If you have physical access to all network devices I suggest using console port to connect. Sometimes console login passwords are also not set and left default like “cisco/Cisco”.

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Latest Updates
Oct 01, 2025

Understanding the Core Switch: Key Differences and Uses

Explore the core switch''s role as the backbone of your network. Discover key differences, uses, and insights into layer 3 core switch technology.

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Latest Updates
Jun 24, 2026

Re: CoreSwitch MACAddress everywhere

Here the answer from one of our engineer: ''The "core switch" is probably an L3 switch, meaning it replaces MAC addresses. So any traffic from end device to FGT through switch will arrive

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Latest Updates
Oct 19, 2025

Core Switch vs. Distribution Switch vs. Access Switch

Comprehensive guide to Core, Distribution, and Access Switches. Roles in the network and important parameters explained.

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Latest Updates
Aug 18, 2025

Internet not reaching Core/Access Switch

Please rate and mark as an accepted solution if you have found any of the information provided useful. This then could assist others on these forums to find a valuable answer and

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Latest Updates
May 25, 2026

Cisco CLI Switch Command Cheat Sheet for 2025

Here''s the Cisco CLI Switch Command cheat sheet you need for

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Latest Updates
Mar 22, 2026

Solved: Trace network port

Solved: Hi, i have core switch 6509.I need to trace this server A is connected to which port in the Core Switch.I found out that this is the correct way

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Latest Updates
Aug 19, 2025

Core Switch Port Problem

Dear All, I have Core Switch 4506 and i have 2 vlan : vlan 2 : 192.168.1.2 255.255.255.0 vlan 10 : 192.168.10.2 255.255.255.0 and no switchport uplink to firewall router 192.168.100.1 My

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Latest Updates
Aug 13, 2025

How to find the IPs connected to an Access Switch

In this figure, you can find a Core Switch and two Access switches connected to it. There are two end devices PC0 and PC1 connected to Switch A and B respectively.

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Latest Updates
Jan 03, 2026

A device can be pinged from core switch ( router) but not the switch it

Our school district has A/V devices in every classroom. I sometimes get a report that a device can not be found with a ping. I have found that if I do a ping sweep of the whole school IP

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Latest Updates
Feb 20, 2026

Core Responding with Wrong MAC for Edge Switch IPs...

Cores have no ARP entries for edge switch IPs (they''re ISIS/CLIP addresses, not in VLANs) The Question: When traffic from the firewall (VLAN 100) is destined for edge switch CLIP

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Latest Updates
Jan 23, 2026

Solved: Core Switch

Dears This is my first time to configure core switch on packet tracer and still confusing in core switch how to interconnect all the core switch? and I can''t put any IP ADDRESS for each port

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Latest Updates
Apr 30, 2026

Useful Cisco Switch Verification Commands

Switch ports (interfaces) are where devices like computers, servers, or other switches connect. It''s important to make sure these interfaces are working. To see all ports quickly, their IP addresses, and

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Latest Updates
Aug 10, 2025

User not getting IP via DHCP from Core Switch

Hi, we are using cisco catalyst 9300 stack as core switch. DHCP is configured in core switch. But from yesterday many users (LAN and Wifi) are facing issue as they are getting

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Latest Updates
Sep 11, 2025

What is Core Switch and How to Choose?

Discover what a core switch is and learn how to choose the right one for your network. Explore key features in selecting a core layer switch. Make

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Latest Updates
Jul 20, 2025

A device can be pinged from core switch ( router) but not the switch it

This is likely related to how the vlans are setup with the gateways on the core switch, and the vlan where the mgmt interface is on the edge switch where the device is connected.

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Latest Updates
Nov 29, 2025

FS Community

Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu.

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Latest Updates
Jan 04, 2026

How to find core switch

Hi, Can anyone help me to find out that connected switch is core switch. Is there any command or trick to find it. There are 7 switches connected but unable to find which is core one .

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Latest Updates
May 25, 2026

HP-Aruba Core switch reporting occasional duplicate IPs

HP-Aruba Core switch reporting occasional duplicate IPs Our HP/Aruba 5406 core switch is occasionally showing multiple duplicate IP detected messages on 3 of our VLANs.

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Latest Updates
Oct 19, 2025

Re: Not able to grab IP from Core Switch

OK. Disconnect it from the Core switch factory reset it, re-configure the VLAN and ports and then test again. IF that fails its definitely a defective switch.

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