Monthly Archives: August 2008

6 STP States

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NOTE—The current IETF Bridge MIB (IETF RFC 1493) uses disabled, blocking, listening, learning, forwarding, and broken dot1dStpPortStates. The learning and forwarding states correspond exactly to the Learning and Forwarding Port States specified in this standard. Disabled, blocking, listening, and broken all correspond to the Discarding Port State — while those dot1dStpPortStates serve to distinguish reasons for discarding frames the operation of the Forwarding and Learning processes is the same for all of them. The dot1dStpPortState broken represents the failure or unavailability of the port’s MAC as indicated by MAC_Operational FALSE; disabled represents exclusion of the port from the active topology by management setting of the Administrative Port State to Disabled; blocking represents exclusion of the port from the active topology by the spanning tree algorithm [computing an Alternate or Backup Port Role (17.7)]; listening represents a port that the spanning tree algorithm has selected to be part of the active topology (computing a Root Port or Designated Port role) but is temporarily discarding frames to guard against loops or incorrect learning.

Sources.

Living Out My 3 Lives.

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It’s been two months since I joined to a new consulting company, changing my work from support role to professional services. Life’s been really fast. From the first day I started, my manager handed a project documentation to build 3 data centres, reading through it and get involved on day 2. This is when I realized all my study and hard work was challenged and moving to a whole another level.

My first assignment was done about 4 weeks ago, and then I had to come back to office. I thought life was running fast on my first assignment, I was wrong. Once I showed up on the office, several projects already waiting. Currently I’m holding 8 small projects, next few weeks I’m already booked for QOS audit, Wireless project, and Wireless dot1x project.

My knowledge is limited, thus the projects requires me to read more, and more, and more, and more. This is where I feel stretched to the maximum level. I have to learn about Voice, Wireless, and I thought I know about Routing & Switching, I was wrong.

My CCIE study obviously being postponed until I can get my rhythm back. Currently I’m living three lives. As a technical consultant, providing technical solution to the customers. This is taking 8 hours of my life.

Once I got home, I need to spend two hours with my wife. This is my life as a husband and trying to keep my marriage life sane.

the rest of the night up until 12 or 1 am, I spend to study whatever I feel need to learn. From knowledge I need to know to support my work to CCIE reading materials.

I cut unnecessary activities and I have to say no to my friends. I only have time to go out on Sunday, while from Monday to Saturday I’m living out my 3-lifes. What a life.

This is what I call investment because I can see what I can be in the next 5 years. If I can see it, I can achieve it!

Himawan Nugroho, a triple-CCIE, has his blog Living in the Fast Lane. I’m totally not on his par, but I think I get what he means by that. If you living in the fast lane, you gotta run!

UDLD Aggressive is not enabled by default.

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I thought I knew enough about UDLD. Petr Lapukhov from Internetwork Expert writes a good explanation about UDLD Modes of Operation. From this writing I found out that udld aggressive is not enabled by default.

Also, based on Cisco Documentation about UDLD Aggressive Mode, what’s on by default is udld enable which will not bring the link down yet only mark the port as Undertermined.