+-----------------+ +-----------------+
| HP A7500 | | HP A7500 |
| | IRF | |
+-----------------+ Links +-----------------+
| 10Gb +<--------->+ 10Gb |
| Module +<--------->+ Module |
+-----------------+ +-----------------+
| | | |
| | | |
| | | |
| | | |
+-----------------+ +-----------------+
In our environment, we have an HP IRF (Intelligent Resilient Framework) switch cluster running between two HP A7500 chassis connected via 2 10Gb Fiber interfaces.
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I used to post in Blogsome couple of years ago before until the site closed down. In here, I have posted blogs about RANCID which is a set of scripts (PERL) used to monitor network devices configurations and maintain history of changes via CVS (Concurrent Version System). Here are some of my post about RANCID (version 2.3.2) which are now archived in the Internet which might be of used to someone interested in RANCID and customizing it.
RANCID under the hood (posted October 23, 2011) This post show the internal working of RANCID and understand how it works and which scripts are executed and dependent on each other RANCID additional commands (posted November 2, 2011) Normally, RANCID executes some commands when connecting to network devices, this post discusses how to include additional commands. RANCID Customization (posted November 9, 2011) This post is discusses how to poll different groups of network devices with different sets of commands I hope in the future I can update my knowledge with the current release of RANCID. This is continuation post of the usage of Python Paramiko network device configuration script (netscript.py) I am currently testing. Let us say you have around 100 network devices accessible via SSH and you need to update their configuration. For example you need to add a new syslog server and remove the current one. In Cisco IOS, you would need to run these set of commands: # Enter Configuration mode We had this problem with one of our Internet links which was an ADSL/PPPoE connection. Every now and then this Internet connection seems to be unstable and it affected Internet access through this line. One solution we came across is resetting the ADSL connection either by pulling the cable off or shut/unshut the interface. Once the ADSL/PPPoE gets reconnected, Internet access becomes stable again. While waiting for the service provider to fix the issue (if it gets fixed), we needed to every now and then reset the interface connecting the ADSL/PPPoE line. This can be during after office hours (i.e. 12MN) but should be automated (I can't be doing this manually) Here comes my Python Network Script (netscript) discussed here in my post along with cron. Below are my steps in automating this task. First we create the command file (interface_reset.txt) which will shutdown and enable the network interface. #!/bin/bash |
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