642-812 bcmsn

passed at last - fair few hsrp/glbp question, lots of lwapp - my lab had a problem after i had done all the work and wouldnt let me "copy running-config startup-config" which had me convinced i'd failed - but i scraped through all the same. Definately a much harder exam than i was expecting.

i have already started on the bsci (642-901), but got an email that i need to do a load of specialisation exams (ccna voice and the related specialisation exam) so a break whilst i do my ccna for the 4th time - at least it will not voice related questions!

Separately we are working on a approx 1000 user voice deployment at work based on 4 x 4507 and around 30 2960/3750 switches. We are working with an avaya specialist and covering subnet design and configuration and deployment. The only hitch we have come up against is ...

they use a server 2003 dhcp server which is clustered. each of the vlans (around 80) has a helper address configured. This was behaving unexpectedly and returning incorrect ip assignments for the vlan e.g. it would give an ip address for the 160 subnet on the 120 vlan resulting in connectivity problems.

Normally this is because a trunk port is configured to the dhcp server, but in this case we discovered the use of superscopes caused the problems. The answer: Dont use superscopes unless you know exactly what you are doing!