Lately, I have been struggling to understand the logic behind route-map and its functioning when used along with a prefix-list in order to filter prefixes. Basically configurations where the permit/deny of prefix-list couples with permit/deny of route-map. So I decided to lab it out in GNS3 – only allow 172.1.1.0/24 to pass through; filter everything […]
Ttcp can be used to test P2P links, however, the drawback of generating the traffic from router is high CPU usage as this is a control-plane operation. Therefore, it is not really recommended to use this utility to determine throughput for bigger interfaces. TTCP is a hidden undocumented and unsupported IOS command. For testing of […]
The Datacenter NOC where I work requires the network team working in night shifts to test the working status of ISDN circuits as they are very prone to failure due to multiple reasons. Let’s find the WAN IP address of a remote branch by logging into the Regional Office (RO) router. Login to the remote […]
Mistypes holding up work This is often an annoying problem. Mistype a command and the router thinks you just typed a host name. For example, here we just mistyped the word “show”. We didn’t want to telnet to a device named “shwo”. The way to handle this is to change the preferred transport method. Problem […]
As the famous words go, The journey of a thousand miles must begin with a single step. These words stand true in my case. I have joined one of the leading IT Services companies as a Networking Engineer at a NOC, handling the WAN for a National Banking customer. It is a ‘small big step’ […]
