At work we switched from a Cisco Catalyst 3560G to a Catalyst 4500E a few weeks ago. Remember to issue the spanning-tree extend system-id command prior to enabling VTP version 3. During the test period, the Icinga instances logged packet losses of varying degree around the clock when doing ICMPv6 pings.

Read More → Lessons learned on Cisco Catalyst 4500E

After installing KB3114409, Outlook 2010 started only in safe mode, even when told not to do so. Removing KB3114409 solved the problem. QA at Microsoft keeps lagging behind. A few weeks ago, HTML email made Outlook 2013 crash due to “improved” font handling, courtesy of KB3097877. Others were unlucky and couldn’t login until KB3097877 was […]

Read More → Outlook 2010 and KB3114409

Sometime ago I switched from a Huawei E220 to a Huawei B593s-22. My 3G internet connection became a 4G internet connection in an instant. I recently turned on IPv6 on the 4G WAN interface, only to be really disappointed. NetCom does not offer IPv6 service to its 4G customers. That’s a shame. With ARIN running […]

Read More → NetCom 4G and Huawei B593s-22

ARIN, the American Registry for Internet Numbers, is closing in on their Z day. Soon only AfriNIC will have IPv4 address blocks available for their customers, and even AfriNIC will run out of IPv4 addresses sometime in the year 2019. See ARIN’s IPv4 depletion webpage for more information. The bottom line is: Start using IPv6!

Read More → ARIN close to Z day