Switching

SG220-50P PoE lights on, Copper test says open cable, nothing connected. There have been strange issues with this switch regarding PoE passing through to phone (which get an IP address fine) but when a PC is connected to the same port, it gets nothin...

Hello, I´ve got little problem. I need to connect 2 subnets together with multiuser. I saw lot of videos how to do that but nothing works. Please help me!  There are some tutorials that I saw:  http://www.examtut.com/2013/10/cisco-packet-tracer-mult...

This morning I had a customer network down due to a network loop, it turned out that the loop was caused by a single switch port were an AP1242 was connected to. I discovered that the AP went down during the night due to the failure of the power supp...

Hello! I have a number of 1841 routers as part of my lab.  All worked perfectly until yesterday, when one suddenly failed to boot.  The output is below. I have been unable to find the exact same issue in any of the forums. System Bootstrap, Versio...

Hi all,  I have a 3945e router running Version 15.4(3)M5, RELEASE SOFTWARE (fc1).  Yesterday I attempted the deploy of a ehwic-4esg in this router and received the following from sh diag: WIC Slot 1: UNKNOWN PCB Serial Number : FOC194881CC Hardware R...

I was trying to build a small office network  with 2 multilayer  HP 1920-24g switches  and Cisco 5505 ASA with SECPLUS license.  I finally came up with something that works, although I realize that solution may be suboptimal. My goal was to achieve ...

Hello Guys We are having issue after upgrading the ISP link from 40mbps to 100 mbps checking on speed test website getting only 35 to 45 mbps max download speed however ISP confirmed form there side (testing directly from their link after router) tha...

Hi, im currently setting up a DMZ for servers with private vlan and i have a theoretical question about the Community PVLAN and Proxy ARP design. Let say i have a Isolated secondary PVLAN and a Community secondary PVLAN with servers that connects to ...

Dear all  i have a Linksys N900 EA4500 i want to know if the device is under warranty and if the device is V1 or V3 Serial : 12A1060B400185

AUTHENTICATION_FAIL: This Switch may not have been manufactured by Cisco or with Cisco's authorization.  This product may contain software that was copied in violation of Cisco's license terms.

Hi, I have the access list on my main switch as below and I can not figure out why I can not telnet on any port from 10.2.0.51 ip address to 10.2.26.63 ip address? Could you help? Thanks, ip access-list extended "100" 10 remark "ACL-CURRICULU...