Configure SNMPv3
Follow this procedure to configure SNMPv3, which supports Ethernet switch health monitoring (CSHM).
The following commands configure an SNMPv3 username on Cisco 3232C switches:
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For no authentication:
snmp-server user SNMPv3_USER NoAuth
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For MD5/SHA authentication:
snmp-server user SNMPv3_USER auth [md5|sha] AUTH-PASSWORD
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For MD5/SHA authentication with AES/DES encryption:
snmp-server user SNMPv3_USER AuthEncrypt auth [md5|sha] AUTH-PASSWORD priv aes-128 PRIV-PASSWORD
The following command configures an SNMPv3 username on the ONTAP side:
cluster1::*> security login create -user-or-group-name SNMPv3_USER -application snmp -authentication-method usm -remote-switch-ipaddress ADDRESS
The following command establishes the SNMPv3 username with CSHM:
cluster1::*> system switch ethernet modify -device DEVICE -snmp-version SNMPv3 -community-or-username SNMPv3_USER
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Set up the SNMPv3 user on the switch to use authentication and encryption:
show snmp user
Show example
(sw1)(Config)# snmp-server user SNMPv3User auth md5 <auth_password> priv aes-128 <priv_password> (sw1)(Config)# show snmp user ----------------------------------------------------------------------------- SNMP USERS ----------------------------------------------------------------------------- User Auth Priv(enforce) Groups acl_filter ----------------- --------------- --------------- --------------- ----------- admin md5 des(no) network-admin SNMPv3User md5 aes-128(no) network-operator ----------------------------------------------------------------------------- NOTIFICATION TARGET USERS (configured for sending V3 Inform) ----------------------------------------------------------------------------- User Auth Priv ----------------- ------------------ ------------ (sw1)(Config)#
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Set up the SNMPv3 user on the ONTAP side:
security login create -user-or-group-name <username> -application snmp -authentication-method usm -remote-switch-ipaddress 10.231.80.212
Show example
cluster1::*> system switch ethernet modify -device "sw1 (b8:59:9f:09:7c:22)" -is-monitoring-enabled-admin true cluster1::*> security login create -user-or-group-name <username> -application snmp -authentication-method usm -remote-switch-ipaddress 10.231.80.212 Enter the authoritative entity's EngineID [remote EngineID]: Which authentication protocol do you want to choose (none, md5, sha, sha2-256) [none]: md5 Enter the authentication protocol password (minimum 8 characters long): Enter the authentication protocol password again: Which privacy protocol do you want to choose (none, des, aes128) [none]: aes128 Enter privacy protocol password (minimum 8 characters long): Enter privacy protocol password again:
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Configure CSHM to monitor with the new SNMPv3 user:
system switch ethernet show-all -device "sw1" -instance
Show example
cluster1::*> system switch ethernet show-all -device "sw1" -instance Device Name: sw1 IP Address: 10.231.80.212 SNMP Version: SNMPv2c Is Discovered: true SNMPv2c Community String or SNMPv3 Username: cshm1! Model Number: N3K-C3232C Switch Network: cluster-network Software Version: Cisco Nexus Operating System (NX-OS) Software, Version 9.3(7) Reason For Not Monitoring: None <---- displays when SNMP settings are valid Source Of Switch Version: CDP/ISDP Is Monitored ?: true Serial Number of the Device: QTFCU3826001C RCF Version: v1.8X2 for Cluster/HA/RDMA cluster1::*> cluster1::*> system switch ethernet modify -device "sw1" -snmp-version SNMPv3 -community-or-username <username> cluster1::*>
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Verify that the serial number to be queried with the newly created SNMPv3 user is the same as detailed in the previous step after the CSHM polling period has completed.
system switch ethernet polling-interval show
Show example
cluster1::*> system switch ethernet polling-interval show Polling Interval (in minutes): 5 cluster1::*> system switch ethernet show-all -device "sw1" -instance Device Name: sw1 IP Address: 10.231.80.212 SNMP Version: SNMPv3 Is Discovered: true SNMPv2c Community String or SNMPv3 Username: SNMPv3User Model Number: N3K-C3232C Switch Network: cluster-network Software Version: Cisco Nexus Operating System (NX-OS) Software, Version 9.3(7) Reason For Not Monitoring: None <---- displays when SNMP settings are valid Source Of Switch Version: CDP/ISDP Is Monitored ?: true Serial Number of the Device: QTFCU3826001C RCF Version: v1.8X2 for Cluster/HA/RDMA cluster1::*>