Re: [LARTC] Re: LARTC Digest, Vol 4, Issue 9

[Daniel Lopes]

Radu CUGUT schrieb:

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.

It seems you can´t read. To ping someone you exactly know is connected 
to the switch is the easiest way to get an arp cache entry. If you don´t 
get an entry the switch is not working or the other one is blocking arp 
what shouldn´t happen because he wouldn´t be able to receive any 
packets. Just try what I said. Blocking protocols like ICMP doesn´t have 
an impact on the work of arp respectively ethernet. Exactly spoken no 
impact of getting the hardware address.

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[LARTC] Re: LARTC Digest, Vol 4, Issue 9

[Radu CUGUT]

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
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