Se venligst den engelske version!

Kære kollegianer
Der har over den seneste tid, mest i dag og i går, været problemer med
internettet hos K-Net.
Dog skulle de fleste have internet på nuværende tidspunkt.
Der arbejdes på at finde frem til specifikt hvad fejlen er og i den
process vil vi gerne høre fra brugerne, hvis nogen stadig oplever at
nettet svinger (fra online til offline), hvert ~10. minut.
Skriv til netdrift@nybro.dk
Mikkel, Netgruppen

See English version hereAs many noticed, K-Net had trouble and the internet was down until 11 PM instead of 5 PM last Monday. They apologize.

Tomorrow Friday at around 3 PM there will be another interruption. This time a lot shorter they say. They estimate it to be around 30 minutes.

Sincerely,
The network group at Nybrogård Kollegiet

See English version.

During the Autumn break you will experience downtime due to maintenance on our network infrastructure located here at the dormitory and at K-Net as well. We are upgrading our network equipment so that the K-net Utilliy will become obsolete.

Specifically Monday 17th from 12 noon to 5 PM K-Net has announced that they will be changing core equipment and the internet connection will be unavailable. During the next days until Thursday K-Nets website might be unavailable in periods, and mails sent to @nybro.dk and @k-net.dk addresses might be delayed in periods.

This upgrade will also affect the Wireless Network.

We will do our best to keep you updated on www.nybro.dk/for-beboere/nyheder

For the technically interested, the work during this upgrade is the following:

We will reconfigure our network switches so that each room plug on the wired network has its own VLAN. This will enable K-Net to do the traffic counting and by law required traffic logging without the K-Net Utility. We will be changing the main switch to support this.

K-Net will set up a new firewall which will take over from FW2 with settings for the new VLAN setup. K-Net will setup new switches and two new servers (DNS, mail, management, etc.) to work together with the new firewall. They will also be changing rack closets.

The wireless network and kitchen computers will remain with the old system with the K-Net Utility and FW2 a little longer, but will also eventually be free from the K-Net Utility. We will be changing at least one switch in each block to support this, but we do not expect that the new switches can be delivered in the autumn holidays.

While not being 100% certain yet, as it has not yet been approved by the board of K-Net, the idea is that the traffic limit will be much higher than now, and will be more “soft”. If you exceed the traffic limit you will have limited internet speed instead of being blocked completely. It is also planned that it should be possible to choose to have your incoming ports open.

Because the wireless network and the kitchen computers will be running on the old system for at while longer, the old traffic limit will still be in place there.

Sincerely,

The network group at Nybrogård Kollegiet.

K-net har det sidste lange stykke tid oplevet problemer med at brugere ikke kan logge på i aftentimerne.
Det er selvfølgelig beklageligt at man ikke kan logge på når man skal bruge internettet, men der er ved at blive fundet en løsning på problemet. Det skulle meget gerne løse sig i løbet af sommerferien.

K-net har den sidste uges tid kørt med et forsøg hvor trafiktællingen har været deaktiveret, denne bliver genaktiveret i morgen tidlig kl. ca. 08.30.

Med venlig hilsen
Mads Pedersen
Formand for K-netK-net have problems during the evening, because of the heavy usage.
This is of cause not how it should be, and K-net is working on a solution that hopefully will work after the summer holidays.

The last week there has been no accounting of traffic. This was to see the effect on the server load. Unfortunately this only helped for a couple of days. The accounting will be reenabled tomorrow morning around 08.30.

Best regards
Mads Pedersen
The Chairman of K-net

(all in English)As many has noticed it can be a hard time to log on to K-nets firewall (fw2) doing the time interval from 16-23, especially Saturdays and Sundays.

The problem is not at Nybrogård dormitory but at the firewall server at DTU.
The server cannot handle the pressure of the many user logins on doing this time period, due to lack of memory.

Personnel at K-net are aware of the problem and didn’t want to disturb the examperiod. Also they are voluntary and don’t get paid for their work, therefore they have not had the time to get the work to be done.

Within the next period of time K-net will work on a new system or an upgrade of the exiting system. Until then you have to be patient.

The more technical term for the lack of memory in the server: Every time a user logs on, a small amount of memory are reserved for that user and when the server reach about 1500 simultaneous users it runs out of memory and all CPU power are used for interrupts and errorhandling therefore the users able to login will notice it takes some time, others see a connection timed out for both servers.

I hope this will clean things a bit.

If you need to address the anything about the problem you should go the the K-net forum (http://www.k-net.dk/tiki-forums.php)

Mikkel, the Netgroup

Brugertilbagemeldninger er ønsket.

Som nogen nok lagde mærke til, så har der på nogle gange været en hel del aktivitet nogle søndage over de sidste 2 måneder.
Netværksgruppen har været en tur rundt for at opgradere alle gange til samme opsætning, hvad angår WiFi

Det vil sige at nu sidder der  3 Access Points (AP) i alle blokke og alle disse er tilsluttet via PoE, hvilket vil sige at rengøringspersonalet ikke længere afbryder AP’erne en eller flere gange om ugen. Alle næsten alle AP’er er a samme slags og kører med samme software.

I den næste periode vil vi i Netgruppen meget gerne have jeres tilbagemeldninger, om hvordan det fungere, så vi kan forbedre det til alles fordel. Oplever du problemer, hvordan er styrken på dit værelse, hvilket OS bruger du, bliver du smidt af netværket, bliver du smidt af K-net men ikke netværket og sker det også for dine naboer?

Ligeledes bedes alle med private AP’er/WiFI Routerer kontrollere deres opsætning, således at de ikke sender på de samme kanaler som det NYK AP som er tættest på. Dette minimere genre fra interfrens hos naboerne.

Er der spørgsmål er I velkommen til at kontakte os via netdrift@nybro.dk eller i kontortiden

English version will be updated later today

Så er NykTV online igen efter noget tid med nedetid, pga. en uforudset fejl i hardware.

Netværksgruppen arbejder så småt på en ny løsning til at køre NykTV og vi beklager hvis NykTV igen går ned.
Dette kan ske pga. den gamle hardware som kører den (5+ år på nogle af delene)

Hej alle, særligt beboere i NO-blokken.

Short english: the network on NO block and O-appartments is now working again.