I ran four tests yesterday using iperf3. The T6225-CR NIC still runs with Chelsio’s SM10G-SR optics. It’s amazing that receiving TCP streams runs at full speed. Sending TCP streams limps away only at a few megabits per second. This wasn’t expected at all. Even IPv6 runs faster than IPv4 for these particular tests. The Cisco switch at the other end uses Fiberworks’ SFP-10G-SR optics. Does anyone have any clues? Continue reading iperf3 and Chelsio T6225-CR→
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.
Today at work, we received an ATEN/ALTUSEN KN2132 KVM switch. Unlike our previous KVM switch, this model has IPv6 capability.
Sadly, version 1.8.174 of the firmware contains an annoying bug. If you want to use SLAAC, then the firmware neglects to invert the universal/local bit while transforming the MAC-48 address to a modified EUI-64 format interface identifier. Continue reading ATEN/ALTUSEN KN2132 and SLAAC→
After long hours of googling at work and at home, I finally arrived at http://www.excaliburtech.net/archives/192, stating this is the way to disable IPv6 autoconfiguration, say when you’re more keen on using a manually configured IPv6 address:
netsh interface ipv6 set interface "Local Area Connection" routerdiscovery=disabled