Abu Dhabi finished

Reached home yesterday after 7 hour journey from Abu Dhabi to Heathrow. Finished the migration in Abu Dhabi. Was very quick and never expected that to be quick. Next i am off to Amman, Jordan for the next migration and then back in Dubai for two weeks for the migrations in Dubai. Have this week so expecting to do some reading on my CCIP exam.

Migration in Abu Dhabi

Off to Abu Dhabi tommorrow morning for another migration. Not a big site this one !!! 2 WAN repeaters and few 3560 switches with one 6509 switch. Hopefully should have no problems....

Will keep you posted !!!

CCIP Study Started

Got my books for CCIP today. So the countdown has begun. Have been reading BGP, QOS and MPLS for a while but now its time to put the real experience to test. Got my two books

1) CISCO QOS --Exam Certification Guide (Second Edition)
2) Internet Routing Architectures -- Second Edition

Will give my first composite exam .. BGP + MPLS within next 15 days. Will keep you updated...

LAN Migration Done

Last week was busy migrating a site in Austria and preparing it so that it is ready for this week for the WAN migration. Site wasnt that big but configuring 1 x 6500 swtich, 22 x 3560 switches and migrating the users from the OLD entrasys switch in two days was tiring. But i am glad all of that worked without much of problems. Only one small problem which nearly brought the whole site down. I stil dont understand the real problem but if someone can shed some light on why this happened then that will be great.

What happened was that i had configured port channel on port 49 and 50 . Ports 51-52 were empty. By mistake the Fibre SFP was connected on port 51. We never noticed that while racking the switch and connected the fibre on that. We kept on racking the switches but after around 10-15 minutes users started complaining that they are not getting any IP from the DHCP and within 10 more minutes everyone in the office was complaining. I was quick to find the problem as i worked my way backwards and within 5-7 minutes i traced back to the switch where the SFP was plugged in wrong. Plugged it back into the righ port and .......it worked.

I still dont know how can SFP plugged into a wrong port can cause loop and bring the whole network down. Your comments !!!!!