Who rated this post

Here a documentation of the workaround I used to get SHA1 working on R81 fresh installation:

1. Create SNMPv3 user with SHA256 and test it

r81-system> add snmp usm user checkmates security-level authPriv auth-pass-phrase Cpwins1! privacy-pass-phrase Cpwins1! privacy-protocol AES authentication-protocol SHA256
r81-syste# snmpwalk -v 3 -l authPriv -u checkmates -a SHA-256 -A Cpwins1! -x AES -X Cpwins1! 127.0.0.1 HOST-RESOURCES-MIB::hrSystemUptime.0
HOST-RESOURCES-MIB::hrSystemUptime.0 = Timeticks: (257555406) 29 days, 19:25:54.06

2. Get the Gaia DB config from an older system (R80.x)

r80.x-system# cat /config/active | grep auth:proto
snmp:v3:user:checkmates:auth:proto .1.3.6.1.6.3.10.1.1.3

3. Set Gaia DB setting on new system

r81-system# dbset snmp:v3:user:checkmates:auth:proto .1.3.6.1.6.3.10.1.1.3

4. Check that the Auth-Type has changed to SHA1

r81-system> show snmp usm user checkmates
Username checkmates
Permissions read-only
Security Level authPriv
Authentication Type SHA1
Privacy Type AES

5. Set the passwords again (else it will not work) and test with SHA1

r81-system> set snmp usm user checkmates security-level authPriv auth-pass-phrase Cpwins1! privacy-pass-phrase Cpwins1!
r81-system# snmpwalk -v 3 -l authPriv -u checkmates -a SHA -A Cpwins1! -x AES -X Cpwins1! 127.0.0.1 HOST-RESOURCES-MIB::hrSystemUptime.0
HOST-RESOURCES-MIB::hrSystemUptime.0 = Timeticks: (257576932) 29 days, 19:29:29.32

Hope that helps some of you!