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Netflow problems

kristian_tomol13

Hi All,

I implemented NPM and NTA on our client..

I'm having a problem in discovering the routers using NTA

Our client have 5 routers lets say R1, R2, R3, R4, R5

R2, R3, R4, R5 are all connected to R1 via MPLS.

I enabled ip flow-export source on R2 at Serial0/1/0.361

I enabled ip flow-export source on R3 at Serials0/1/0.160

I enabled ip flow-export source on R4 at Gigabitethernet0/0

I enabled ip flow-export source on R2 at Serial0/0/1

I also enabled SNMP on all of these router and I discovered them all on NPM

I set public as their credential in SNMP

But when I'm discovering them on NTA using manual discovery

I'm having an error when I type their credential on the "Read/Write Credential"

It seems that NTA doesn't accept the credential that I typed.

This scenario happened except for R4, but for the remaining routers (R2, R3, R5) the one one that I mentioned above are the scenarios that I encountered.

What could be the possible solution for this?

Please help..

Thanks

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nrms

public is normally used as a Read Only SNMP credential. Also, using public is not wise - it is the first thing someone will try if they want to hack into your systems!

If you do a 'sh run | inc snmp' on the routers, do the 'snmp-server community' lines end with 'RO' or 'RW'?

kristian_tomol13

Oh, I see, it seems I figure out my problem.

I type this on CLI of the routers

snmp-server community public RW

I think I have to change public to any secure credential

Right?

Thank you very much, I really appreciate your help.

nrms

As long as the <string> from the 'snmp-server community <string> RW' command matches the <string> you specify in NTA (and it is an RW line) it should work; even if you have used 'public'.

The advice to not use public/private is just best practice since they are a universal default that offers about as much protection as a chocolate tea-cosy!