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Hello, Cisco Community!I’m really happy to share that I’ll be hosting the Cisco Community Lab Series, a brand-new hands-on learning journey designed to help you build practical networking skills step by step.Every Thursday at 8 PM EST, I’ll post a ne...

Hello folks!I'm dialing with a strange issue, my interface in the sup module appear as inactive, I already change the SFP, change the config routed to access and still the same.CORE-VSS(config-if)#do sh int status mod 3Gi1/3/3 *** LAN-TO-LAN CEN inac...

Hello I setup 5 putty SSH session to 5 Cisco 3850 switches to push the new Denalli 16.3.7 to mitigate a memory leak issue on 16.3.6. At exactly 4 hours into the copy ftp: flash: the putty window closed with "Line Timeout Expired".    Why did this hap...

mlenco by Level 1
  • 1898 Views
  • 2 replies
  • 0 Helpful votes

I wanted to add the ability to telnet/ssh into the switch.  I have been making vlan 2 as the management port and gave it a IP address.  I added the default gateway and I still cannot ping it from any computer on the network.  I am a beginner to this ...

From What I've Read On The Internet About The Reason Behind The Ethernet Frame Data Size Is Limited Between (46 - 1500), Iv'e Found The Reason Is Because Of Historical Limitations Which Doesn't Apply For Today's Hardware And Software Capabilities, I ...

Ali Hazim by Level 1
  • 888 Views
  • 4 replies
  • 0 Helpful votes

Hi Folks,We recently moved to call Express Manager and we have users complaining about the new login process onto their Cisco Phones. Previously, they were only required to type numbers as user and password.Now, the keyboard has changed to Alpha-nume...

Hi All,   I would like to create a database. We work with a lot of Cisco model (Asa, switch, router, ap, etc..) I collect the switches and its interface's name. Forexample: WS-C2960X-48LPS-L ! interface FastEthernet0 ! interface GigabitEthernet1/0/1 ...

Szabo Tomi by Level 1
  • 13714 Views
  • 7 replies
  • 0 Helpful votes

Hi Guys,My company is using IPT phones model CP-7821For the past 2 weeks we've been noticing some strange behaviors with certain phones...Once plugged they display "Network Unavailable" and if we take a look into the switch interface and keeps changi...

nakama2015 by Level 1
  • 11735 Views
  • 6 replies
  • 0 Helpful votes

Hi, I have laptop connected behind IP phone, and problem is, when laptop disconnects from LAN, port still remains authenticated. On PCs I use dot1x and on IP phones MAB, so host-mod is configured to multi-domain. Is there any solution how to prevent ...

vlad09 by Level 1
  • 1419 Views
  • 3 replies
  • 0 Helpful votes

Hi guysI have a really strange problem. I have a WAP 371 cluster with 7 APs, connected to a SG300-52P.Since a few weeks the clients (iphones, W10 PCs) are constantly disconnecting after a few minutes. Sometimes the devices reconnected after a few min...

RobinD by Level 1
  • 1440 Views
  • 6 replies
  • 0 Helpful votes

Hi all! I'm trying to resolve the following task - we have a Nexus 3000 switch which acts as transit L2 switch between our routers, several ISPs and private WAN links. I want to preserve bandwith for routing and management protocols to prevent user-g...

dukenuk96 by Level 3
  • 1350 Views
  • 1 replies
  • 0 Helpful votes

Hello fellow networking geeks!  I recently lost (system corrupted HDD) a configuration file to one of our Cisco SG-300-28 port managed switch and have had to rebuild a switch with less than great notes from the previous IT Manager. In my MDF I've got...

Hi I have a 3850 switch with NTP configured. The connection to the NTP server was disconnected briefly but after the reconnect NTP hasn't syncroniced. It would probably start to work if i remove and add the ntp server statement againt. But are ther...