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SNMP community strings are text strings that act as a rudimentary authentication mechanism for SNMP v1/v2. An SNMP manager places a community string (in plaintext) into an SNMP request when sending the request to a managed device such as an

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0model1
. The SNMP agent in a managed device ignores SNMP requests that do not contain a community string matching with the previously configured one. The
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supports configuring up to eight SNMP community strings using the communityString object described below.

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For additional details about configuring SNMP,

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refer to Configuring SBC for SNMP.

Command Syntax

Code Block
languagenone
% set oam snmp
	communityString
		<snmpCommunity_Index>
		snmpCommunityName <community name>
	localEngineId <Id>
	securityLevel <authNoPriv | authPriv | noAuthNoPriv>
	trapTarget <trap target name>
		ipAddress <IP address>
		port <port number>
		state <disabled | enabled>
		targetSecurityLevel <authNoPriv | authPriv | noAuthNoPriv>
		targetUserName <name>
		trapType <inform | v1 | v2 | v3>
	users <username>
		authKey <colon separated hex string>
		authProtocol <HMACMD5 | HMACSHA>
		group <admin | user | operator>
		privKey <colon separated hex string>
		privProtocol <DES | AES128>
	version <v1v2c | v3only>

% show oam snmp trapTarget <trap target name>
   displaylevel <displaylevel>
   ipAddress <IP address>
   port <port number>
   state <disabled | enabled>
   trapType <inform | v1 | v2>
 
% delete oam snmp trapTarget

Command Parameters

Caption
0Table
1SNMP Parameters
 

Parameter

Length/Range

Description

communityStringN/A

SNMP Community String. A maximum of eight community strings may be configured.

  • <community string Index> – The index of this SNMP Community String (length: 1-32 characters).
  • snmpCommunityName – The name of the Community String.
localEngineId5-32 octetsThe value of User-based Security Model (USM) user engine ID and the SNMP community context engine ID.
securityLevelN/A

The vacm security level for all users in model 0 and 3. Options are:

  • authNoPriv – Authenticated but unencrypted
  • authPriv (default) – Authenticated and encrypted
  • noAuthNoPriv – Unauthenticated and unencrypted

trapTarget

N/A

<trapTarget name> – The name of the trap target.

  • ipAddress – The IP address of the trap target, which can be of type:
    • IPv4 – This is V4 IP address in dotted decimal form (for example, 128.127.50.224).
    • IPv6 – This is V6 IP address in hexadecimal/colon form (for example, 1280:1276:3350:2224:2222:3333:8888:1245 or fd00:21:445:128::7880)
  • port – The port number for SNMP traps (range: 1-65535 / default = 162).
  • state – Configured state of the trap target entry. Options are:
    • disabled (default) – No traps are sent to the trap server.
    • enabled– Traps are sent to the trap server.
  • targetSecurityLevel– The trap target security level.
    • authNoPriv – Authenticated but unencrypted
    • authPriv (default) – Authenticated and encrypted
    • noAuthNoPriv – Unauthenticated and unencrypted
  • targetUserName – The trap target SNMPV3 security name (up to 32 characters).
  • trapType– The type of the trap sent to the target. Options are:
    • inform – SNMP notifications will be sent to the trap target server.
    • v1 – SNMPv1 traps will be sent to the trap target server.
    • v2 (default) – SNMPv2 traps will be sent to the trap target server.
    • v3 – SNMPv3 traps will be sent to the trap target server.
Note

Up to 32 trap targets can be configured on the SBC.

usersN/A

<username> – Use this parameter to define SNMP users for the USM privacy facility. Enter a user name, and then choose from the options below:

  • authKey – SNMPv3 authentication key (colon separated hex string). Once set, the user cannot retrieve this value.
  • authProtocol –  The type of authentication protocol to use.
    • HMACMD5
    • HMACSHA (default)
  • group – Choose the user's group type:
    • admin
    • user
    • operator
  • privKey – SNMPv3 privacy key (colon separated hex string). Once set, the user cannot retrieve this value.
  • privProtocol– The privacy protocol to use:
    • DES
    • AES128 (default)
version

 N/A

The SNMP versions to support in SNMP configuration. Set to "v3only" if using SNMPv3 trap configuration.

  • v1v2c (default) – Support SNMPv1 and SNMPv2.
  • v3only – Support SNMPv3 only.

Command Example

To display the configuration of SNMP parameters:

Code Block
languagenone
% show oam snmp
trapTarget emaTarget {
    ipAddress 127.0.0.1;
    port      8162;
    trapType  v2;
    state     enabled;
}
version       v1v2c;
localEngineId 80:00:0b:3f:03:00:10:6b:2e:e5:e8;
securityLevel authPriv;
users admin {
    group        admin;
    authProtocol HMACSHA;
    authKey      00:00:00:00:00:00:00:00;
    privProtocol AES128;
    privKey      00:00:00:00:00:00:00:00;
}
users guest {
    group        guest;
    authProtocol HMACSHA;
    authKey      00:00:00:00:00:00:00:00;
    privProtocol AES128;
    privKey      00:00:00:00:00:00:00:00;
}
users operator {
    group        operator;
    authProtocol HMACSHA;
    authKey      00:00:00:00:00:00:00:00;
    privProtocol AES128;
    privKey      00:00:00:00:00:00:00:00;
}