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Cisco - how to find IOS version and configure SNMP

I'm pretty much a cisco newbie, and I have two things that I need to do on our three cisco routers, and 4 switches.

1.  I need to find out the amount of memory installed, and the IOS version.  If I remember right, I just console in and type:
sh ver
or something to that effect.  Does anyone remember the exact command?

2.  I need to turn SNMP on, and change the read only string from public to our internal one.  Is there a set of commands that can be used on my catalyst switches, and my routers to simply enable this?

Thanks!
Terry
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terrymason
Asked:
terrymason
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2 Solutions
 
JFrederick29Commented:
1. You got it.  "show version" will display the IOS version and memory installed.

2.  To enable SNMP "snmp-server community <string> RO
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terrymasonAuthor Commented:
ok, i think i have it.  How do I actually show the snmp read / right community strings that exist?

Also, how do I deactivate the private rw string?

show config gives me this:

snmp-server community private RW
snmp-server community public RO
!
line con 0
 transport input none
 stopbits 1
line vty 0 4
 password TERRY'S-STRING
 login
line vty 5 15
 password TERRY'S-STRING
 login
!
end
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Don JohnstonInstructorCommented:
When you do a show version, the RAM will be shown in the two "pools" (seperated by a slash). Add the two together to get the total RAM installed.

To remove a command, type in the command preceeded by "no"

no snmp-server community private RW
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terrymasonAuthor Commented:
ahh, I see do I need to remove the current snmp rules before adding new ones?  I noticed that when I typed

snmp-server community public XXXXXX

and then did a show config, it gave the response above.  Do I need to reboot before my changes go into effect, or did I do something wrong?
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JFrederick29Commented:
You are replacing the word "public" with your string XXXXXX.

no snmp-server community private RW
no snmp-server community public RO

snmp-server community XXXXXX RO

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terrymasonAuthor Commented:
thanks guys!
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