[LARTC] how can I monitor a (dumb) switch ?
Hello there, Can anyone help me with a problem i have I have an ethernet LAN, made over dumb fast-ethernet switches (10/100mbit) without management, so there is no IP for the switches. What I want, if possible, is to find out if a switch is down or not. It's like with routers... if you want to find out if a router is OK, either you send ICMP directly to the router, or to a host behind the router. Is there any device, or ANY OTHER possibility that I can find out if a switch is unplugged or broken. Users on my LAN aren't reliable (they have firewalls, closed computers, etc.), so pinging users that are linked to a switch to find out is out of the question. I have got an ideea that if I take an ehernet card, and somehow manage to put power in it, than I would have a device with MAC addres to arping ... is this correct ? MANY thanks in advance, and SORRY for being a bit out of topic. Best regards, Radu. -- Radu Cugut mobile: +40 742 045686 web:http://rcugut.has.it ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
[LARTC] Re: LARTC Digest, Vol 4, Issue 9
Daniel Lopes wrote: Ping a client you surely know should be connected to the switch. ARP will take the part to find out the hardware address so the packet can be delivered. If the switch is on it should find a hardware address and ARP should put it in your ARP cache. It´s independet from ICMP blocks and similar. So after trying to ping you should have an entry in your ARP table which you can control with arp command. It seems that I didn't make myself quite clear ... I want to know if there is a way to find out if a switch is working ok or not. If there is something like a small device, that I plug into the switch, ant then if that device reports in ok, then I know the switch is working. Like on a router... if you want to know if a router is doing it's job, than you send an ICMP echo request to a host on the other side of the router. ME ROUTER - testing host well, I want the same thing but on an inferior layer, on a switch. ME - SWITCH testing device I want to know if thare can be such thing as a testing device. I thought of an ethernet card, that i plug in the switch, power the card up, and then somehot arping the card, from witch I know the MAC. ... but i don't think it works just like that :(. Hope I was specific enough this time Thanks for the (possible) answers. Best regards, Radu. -- Radu Cugut mobile: +40 742 045686 web:http://rcugut.has.it ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
[LARTC] pppoe gateway under linux
Hello to everyone, Can someone help me with hints on how to configure a pppoe gateway on a linux box with 200+ clients behind it ? I've read that user-space daemons give A LOT of CPU overhead. I'm opened to ANY solution ! -- Radu Cugut mobile: +40 742 045686 web:http://rcugut.has.it ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
Re: [LARTC] IMQ: why do I need IMQ ?
OK, i've got the ideea. In conclusion if i have a simple: LAN --- router --- WAN i don't need IMQ stuff :) thanks bye -- Radu Cugut mobile: +40 742 045686 web:http://rcugut.has.it ___ LARTC mailing list LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
