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Archive for January, 2010

BPDU Filtering Vs BPDU Guard – What is the difference?

January 17, 2010 9 comments

BPDU Filtering, BPDU Guard, and Root Guard are STP security mechanisms. In this post I will only describe BPDU Filtering and BPDU Guard.

These 2 features provide protection against spanning-tree loops being created on ports where PortFast has been enabled. A device attached to a PortFast interface is not supposed to send BPDUs but should this happen BPDU Filtering and BPDU Guard provide protection.

BPDU Guard and BPDU Filtering can be configured in 2 different ways, from global configuration mode or in interface configuration mode. In global configuration mode the feature (either BPDU guard or BPDU Filtering) will have effect on PortFast enabled port only. In interface configuration mode it will only affect  a specified port.

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Cisco Networkers 2010 – Barcelona

January 17, 2010 Leave a comment

My company has offered me the opportunity to go to Cisco Networkers which will take place in Barcelona next february. I am really happy as it is the first time that I am going to this kind of event.

It will be in Barcelona from the 25 to the 28 of february.  My programme is mostly focused on EEM (Embedded Event Manager) and QoS.