Re-enable debugs on router reload – EEM Script

I was recently troubleshooting one issue and i ran some debugs on Cisco Voice Gateway and wrote the config by issuing the command “write memory”. Since the router received high call volume, the CPU spiked and the router was reloaded. Upon router reload, the debugs were turned off automatically.  Upon investigation, i realized that this […]

Re-enable debugs on router reload – EEM Script was last modified: March 12th, 2018 by Administrator
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TCP UDP Port Usage – CUCM Voice Gateway and Gatekeeper

It is very important to know the port numbers being used by the devices we work on as it makes life easier. If you are aware of the port numbers, it becomes little easier to troubleshoot. Port numbers are used to determine what protocol incoming traffic should be directed to. Ports are assigned when a session is […]

TCP UDP Port Usage – CUCM Voice Gateway and Gatekeeper was last modified: February 17th, 2017 by Administrator
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Simulate PRI E1 T1 Calls

Hi All, Don’t have a real PRI? Want to simulate E1/T1 PRI on your lab? If yes, then here is the solution. You need two routers, let’s say 2800 series router which has E1/T1 Card connected on each. One router would be Service Provider’s router and another router would be End Customer’s router. You need […]

Simulate PRI E1 T1 Calls was last modified: January 23rd, 2016 by Administrator
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Recover Cisco Corrupt IOS Router Image

Hi All, Cisco Router IOS Image Corrupted? Are you facing this issue? If yes, then here is a way you can recover/restore corrupted router ios image. Assumptions – You have physical access to the Router or you can take console using HyperTerminal remotely. Solution – Take a console using HyperTerminal and get the router rebooted. When […]

Recover Cisco Corrupt IOS Router Image was last modified: February 10th, 2016 by Administrator
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Upgrading Cisco Router IOS

Hello All, In this post, we will learn how to upgrade Cisco Router IOS. Please follow the below steps to start with the upgrade. Assuming you are aware of setting up a TFTP Server and the consequences if the router does not come up after the upgrade. Login to the router using Hyperterminal (recommended in […]

Upgrading Cisco Router IOS was last modified: January 25th, 2016 by Administrator
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Reset Cisco Router Password or Reset Switch Password

Hello All, This is going to be very old but very informative post. People often search for this info in websites on how to reset a cisco router or cisco switch when they forget the password. The below post will help to reset the router password along with configuration. Once the below steps are performed, […]

Reset Cisco Router Password or Reset Switch Password was last modified: January 21st, 2016 by Administrator
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