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Author Topic: SNMP usernames being saved to ROM in Avaya/Nortel 55xx.  (Read 2809 times)

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Offline mikeyvanhecker

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SNMP usernames being saved to ROM in Avaya/Nortel 55xx.
« on: August 25, 2013, 11:37:06 AM »

I've run into an issue when trying to change my SNMPv3 passwords.  I've never had issues with this in the past either.  I use the command "no snmp user suser" and this is what I get back.
% Cannot modify settings
% notWritable 2
% Cannot delete user suser.

This is only happeing on a handful of our switches and there is no difference(that me or my team can tell) between the switches that are free from problems and the ones that are havving issues. 

When I go into JDM edit-> SNMPv3 -> VACM ->group access- storage type:  The username with the issues says "readOnly".

The only thing I can think of to work around this issue is to create all new rw usernames on all the switches or to boot default the ones with the problems... 

Offline Victor

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Re: SNMP usernames being saved to ROM in Avaya/Nortel 55xx.
« Reply #1 on: November 25, 2013, 12:53:42 PM »

I also had the same problem trying to delete snmpv3 users on some switches. I found a method that although maybe it is not the best it was ok for me.

Try this:

- type "snmp-server bootstrap semi-secure" (be careful, this command deletes all existing snmp config)

- after this, it will ask you for all the different passwords for initial, md5, sha template users....

- type the password you want to (I wrote the same for all templates as I was going to erase them later)

Now, you can create the correct snmp user, and delete the rest (initial, MD5, SHA...)

Hope this helps.

Best Regards.


Offline Dominik

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Re: SNMP usernames being saved to ROM in Avaya/Nortel 55xx.
« Reply #2 on: November 27, 2013, 02:49:19 AM »
You can do the task also on the CLI, here I never had problems on the ERS5k switches.
Here is an example how to modify SNMPv3 User in the CLI:

no snmp-server user <username>
snmp-server user <username> sha <pass> aes <pass> read-view nncli write-view nncli

This is only an example you can use different auth protocols loke e.g. DES and different read/write views.
The nncli view is the default admin view that gives you access to everything.
It is also possible to define custom user views like this:

snmp-server view myview +1.3

Good Luck
Itīs always the networks fault!