from the shiny new ip addresses dept.
During the next weeks, we will be switching over step by step the computers in our network to the final IP range intended for the Physics Department as part of the NETng migration. All hosts in the 126.96.36.199/21 IP range (other ranges are not affected) will move into the 188.8.131.52/21 range which means that the first three bytes of the IP address will change.
Every computer not having a static IP address (i.e. nearly all notebooks) will get its address in the new IP range during the night from next Monday to next Tuesday (22./23. Oct. 2007).
Update Monday, 22. Oct. 2007, 21:21: The switch of the dynamic addresses to the new IP range has been made and seems to work generally. Some of the popular Allied Teleysn AT-AR220 NAT routers seem to not accept new IP addresses during usage, but switching them off and on again should help.
All of our managed workstations (Linux, Windows, Macs) will be rebooted during the next weeks for the change, too.
Please read the whole article for details and implications.
Static IP addresses
Anyone who has an active machine with static IP address registered as administrator will be contacted by us for migration.
Things you may need to do if you are the administrator of a machine with a static IP address in the ranges 195.176.48.*, 195.176.49.*, 195.176.50.* or 195.176.51.*:
Calculating the new IP addresses manually
The IP range will change from 184.108.40.206/21 to 220.127.116.11/21. So the first two bytes of the IP address will change from 195.176 to 192.33 for all hosts. The last byte will stay the same for all hosts. And the third byte will have the same offset to the third byte network's base address. So if the third byte of the old IP address is 49 (difference to base address 48 is 1), the third byte of the new IP address will be 97 (difference to base address 96 is 1).
A small table should help to calculate new IP addresses easier:
The new dynamic IP address range will be 18.104.22.168 to 22.214.171.124 with a few gaps.
Student and Seminar Workstations
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