View other devices on network

[krokkie]

I have a Cisco 837 router coneected to a 3COM 12 port switch, and was wondering if there is any way I can see the IP address of this switch?
I cannot connect via console into the switch, and have tried the default IP address, but to no avail.

 

[unclerico]

You can use a piece of software like Angry IP Scanner to scan your subnet and see what addresses are alive.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[krokkie]

Thanks, I will give it a try.
I am not sure in which subnet it is and if it is configured at all.

 

[burtsbees]

Can you even configure an SVI on it? That sounds like a very small network...is there a serial port you can get to on it?

Burt

 

[unclerico]

Good point Burt. Do you have any documentation on the switch?? can you go to 3Com's site and see if it is managed switch?? If it is perhaps they'll have a formal rest procedure that you can walk through. Obviously there are risks with a switch reset if you don't have a valid backup of the config.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[krokkie]

It is a managed switch. I've been on the 3COM site and tried everything they suggested, tried everything in the manual too.
I am trying to connect with a Cisco console cable, which according to me should be a standard console cable.
I bought it secondhand, it doesn't appear to have been configured. It works OK as a switch, but obviously I would like to play around a bit.

 

[DallasBPF]

Could you post the model # on here? Also, it might take a specific type of console cable or could take a null modem cable...

------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[krokkie]

It's a Superstack II Switch 3000.
Ideally I would love a Cisco switch, but I got it for $5, so I'm not complaining.

 

[Linkers]

It looks like this switch is not manageable. Can you log into your router. If yes give "Sh arp" command.

Linkers

 

[burtsbees]

By the way, the Cisco console cable is NOT a standard null modem console cable---it is a rollover cable. Different manufacturers sometimes have different pinouts and baud speeds for their products. I know Cisco and HP are two of them.
You can also do a sh cam/sh mac-address-table. If that is an unmanaged switch, then it probably won't even have a serial port on it, and definitely no IP address. I especially love the ones that have STP enabled and there is nothing you can do about it...like you're going to have redundant $30 switches...lol

Burt

 

[DallasBPF]

Actually the switch is a managed switch;

http://support.3com.com/infodeli/tools/switches/s_stack2/pdf/16942au3.pdf

But you need to go and get yourself a NULL modem serial cable, and set your hyperterminal settings to 8 bit, no parity, and 1 stop bit. As for where to get one, Radio Shack might have one, I know Fry's Electronics do, ummm there is also AllTex (but I do believe they are only in Texas could be wrong though)... Or just find one online...

------------------------------------
Dallas, Texas
Telecommunications Tech
CCVP, CCNA, Net+

CCNP in the works

 

[krokkie]

THanks for all the help, I think my problem is the console cable. I will have to get it from Dick Smith, as I am in NZ.
I will give it a go, everything is in pieces at the moment, as I am relocating the network, so most of it is unplugged.

 

[tjbradford]

just fireup tcpdump or alike packet capture , on a pc and power cycle the switch , during the startup process its sure to fire out a request for the default gateway or alike which will contain its ip , using a packet capture your see the subnet even if your not on the same subnet as it.

 

[krokkie]

Thanks for all the help.
I will giove it a go, probably next week as I am rather busy right now.

 

[l33byt1980]

3coms are cisco pin out,
BUT run @ 19200 8 - N - 1 try that.

Then;

<HOSTNAME>display saved (Will display saved config)

<HOSTNAME>SYS
[HOSTNAME]Int VLAN 1
[HOSTNAME]IP address xxx.xxx.xxx.xxx zzz.zzz.zzz.zzz

You should see that VLAN come up.




ACA - IPOffice implement
ACA - IP Telephony
CCNA - Passed at last

 

[krokkie]

Thanks, will do.