snmp question

[mo shea]

Hi.. I have several points about snmp that I would like to get a better understanding for.

- I have a switch that lies on a different subnet tha i am in and is connected to us via WAN link. I can telnet to the switch and it has community strings and engine ID configured. I wanted to obtain information about it using snmp (solarwinds tools) but I receive snmp could not be retrieved using the strings supplied. I added snmp-server host command to the switch but got the same resul. I am thinking the issue lies with the firewall (natting?) that lies between our core and the remote switch. Is there a quick test to see whther the snmp port is open because i do not have access to the firewall?

- Is the engine ID any random number that can be selected arbitrarily or it is a specific string?

- Is SNMP version 3 commonly used and can anyone guide me to some configurations regarding it

Any help is greatly appreciated

[qingguo-jiang]

Hi...

snmp-server community ***** ro

snmp-server community ***** rw

then use ***** as the specific string....

Regards,

Qian Dick

qiandick@hotmail.com

[todd.martin-02]

tacobell,

like the other post specified, it sounds like you are not using the correct password/community string.

the fact that you can telnet suggest it not a L3 problem(NAT).

I dont think the engineID is a player in this problem, but to answer your question each device will generate a unique ENgine ID.

SNMP V3 is a good thing, the bad part of this good thing is that the NMS vendors dont nativly support V3. OpenView or Tivoli for example. So V3 is not commonly used in my experience. at least not yet.

from a command line do a simple snmp query to see if you can get a response. you may need to do this from your solarwinds box because you will need SNMP service/daemon on the machine.

snmpwalk -c community_string xxx.xxx.xxx.xxx 1.3.6.1.2.1.1.1

x= Ip address

string value = OID for sysdescrip

can you try another device on the same network? the router perhaps?

[mo shea]

Thanks for the replies.

Todd, I couldnt get snmpwalk command to go, but I downloaded a tool called polldevice that checks for snmp connectivity from www.netlatency.com. It worked perfectly on my LAN switches but again could not use it for the switches in the remote site, not even for the core switch there. I cannot test for router or firewall because it is under another department. I think the snmp port is blocked somewhere between