June 2006 Archives
Sat Jun 24 16:35:54 UTC 2006
Cisco 760 Configuration
It's finally there. Sorry for the delay. If you want to connect to the Internet, follow these steps:
- Use a serial modem cable to connect to the Cisco 760. The serial
line settings should be "
9600,N,8,1". - Reset the Cisco 760 by typing "
set default". - Now you should be ready to set it up:
set system your_hostname set switch net3 set multidestination on set ppp multilink on set 2 auto off cd lan set ip address 192.168.0.1 set ip netmask 255.255.255.0 set ip routing on set ip rip update periodic cd set user your_ISP_user set ip routing on set ip framing none set encapsulation ppp set ip route destination 0.0.0.0 gateway 0.0.0.0 set number 0123456789 set bridging off set ppp secret host your_password your_password set timeout 60 dropped automatically cd set ppp authentication incoming chap set ppp authentication outgoing chap set ppp secret client your_password your_password
This should work. If you want to use both ISDN channels, type
"set 2 auto off". Please note that
"set switch net3" only works for Europe. I
don't know the appropriate command for other ISDN infrastructures.
Customize the other settings to your leisure.
Sat Jun 17 19:08:35 UTC 2006
Nur Ärger mit der GEZ...
Today's article is special: It's in German and it's not written by me. But don't be afraid, the article about Cisco Routers is coming - sooner or later.
Wer kennt das nicht: kaum von zuhause ausgezogen, schon landet das böse Schreiben der GEZ im Briefkasten, und sorgt für den ersten Gewissenskonflikt: Zahlen oder nicht zahlen, das ist hier die Frage! Doch selbst, wenn man auf das schlechte Gewissen hört und brav sein Radio anmeldet, wird man nach nicht allzu langer Zeit erneut mit unnötiger Korrespondenz belästigt. Dabei ist der Tonfall des ersten Briefes noch gewohnt scheinheilig-freundlich, während nach Ignorieren desselbigen dann ganz andere Töne angeschlagen werden (dies ist hier zu sehen).
Dabei sollte man sich vor Augen halten, dass es sich bei der GEZ noch nicht mal um eine Institution der Bundesrepublik Deutschland handelt. Da ich mir von einer "öffentliche-rechtlichen, nicht selbständig rechtsfähigen, durch Verwaltungsvereinbahrungen errichteten Gemeinschaftseinrichtung der neun in der ARD zusammengeschlossenen Landesrundfunkanstalten, des ZDF und des DeutschlandRadio" (Quelle: wikipedia.de) einen solchen unverschämten Tonfall nicht gefallen lasse, habe ich mich für einen Antwortbrief (zwei-seitig) entschieden. Mal sehen, wie es weitergeht...
Thu Jun 1 10:44:54 UTC 2006
Connection Trouble - again
The ISP wars were not successful so far. And the situation is getting better: Something in this dreadful world (say, a tree or some other horrible entity) destroyed parts of our leased line. The engineers are still looking for a way to reactivate the connection, but I guess this doesn't work out.
So I am going back some evolutionary steps: I happen to own an old Cisco ISDN router. This gagdet will now connect my LAN to the "intarweb". I was told that this is a good way of handling your life: Don't see problems, see solutions. Well, I do. I think the perfect solution contains me, some bulldozers and a beautiful countryside.
Yet, maybe it's helpful for me if I know a way to set up old Cisco routers via serial consoles. The next entry will be a tutorial about that, so stay tuned.
Thu Jun 1 10:31:21 UTC 2006
The joys of real algebraic geometry
Quadrics are very interesting. To visualize some of your equations, you should use surf. It works smoothly and allows you to create animations as well as static images. A fellow student has created a web page with some nice gifs.
I am not too familiar with surf, but I have created some files which allow you to draw a paraboloid and a torus. Look for them in my surf directory. The .avi movie you can see there was my first try, but I like it.