If you have started to look at BGP you will very soon come across the BGP update-source command. This command tells BGP which interface to source the BGP packets out of. The short demo below will highlight the problem. I have a very simple setup with 2 routers connected with a serial interface and an […]
Network Engineer BLOG by Roger Perkin – CCIE #50038
It was announced at Cisco Live that there will be a CCIE Datacenter cert. Or CCIE Datacentre if you are in the UK! Great blog post from Mark Snow over at INE http://blog.ine.com/2011/07/14/cisco-live-2011-future-of-ccie-voice-data-center-and-overall-ccie-program/#more-5447 Just need to pass the R&S and then maybe this might be the next one. Any cheap Nexux 7000’s on ebay?
How does OSPF work out the interface cost? By default the ospf cost calculation is based on a reference bandwidth of 100Mb The calculation is Reference BW / Configured BW So for a 100Mb interface using the default reference bandwidth of 100Mb The calculation is 100Mb / 100Mb =1 However with modern networks 100Mb is […]
The Cisco implementation of RIPv2 supports two modes of authentication: plain text and MD5 authentication. Plain text authentication is the default setting in every RIPv2 packet, when authentication is enabled. Plain text authentication should not be used when security is an issue, because the unencrypted authentication password is sent in every RIPv2 packet. To configure […]
If you are trying to find the BGP best path selection algorithm on the DOC CD it has been removed from the 12.4 documentation for some crazy reason! You will need to go back to the 12.2 documentation The full path is www.cisco.com / support / configure / producst / cisco ios and ns-ox software […]
One of the essential elements of your CCIE studies is mastery of the DOC CD If you can find any topic on the DOC CD within 15 seconds you will have all the information you need at your fingertips. Today’s DOC CD location is PPOE From the top: www.cisco.com / support / configure / products […]