You simply follow the instructions I’ve laid out in the past above for the ERS 4500 series switches.

Good Luck!

I need to update my Nortel 4550T-PWR switches with the new snmp v3 read-only and read-write passwords. Also i need to enable md5 Authentication and AES encryption on it. Currently it is running snmpv2c. How can i do that.

What are you doing via SNMP when the CPU utilization goes to 100%? If you are walking a large MIB then the reaction is expected since you are heavily polling the switch. If I walk the RFC 1493 Bridge MIB I’ll spike my CPUs as well. That’s because I have some 6000 devices in my FDB/MAC tables so that’s a lot of information for the CPU to gather.

Unless you are having performance issues it’s probably safe to ignore.

Cheers!

You most likely have a configuration error. You should review your configuration.

Good Luck!

usmStatsDecryptionErrors: The packet can’t be decrypted

Thanks for your reply.
Below are the relevent sections:

#
# SNMP V3 GROUP MEMBERSHIP CONFIGURATION
#

snmp-v3 group-member create Manager usm admin

#
# SNMP V3 GROUP ACCESS CONFIGURATION
#

snmp-v3 group-access create “admin” “” usm authPriv
snmp-v3 group-access view “admin” “” usm authPriv read “root” write “root” notif
y “root”

#
# SNMP V3 MIB VIEW CONFIGURATION
#

snmp-v3 mib-view create root 1.3 type include

#
# SNMP V3 NOTIFY CONFIGURATION
#

#
# SNMP V3 TARGET ADDRESS CONFIGURATION
#

snmp-v3 target-addr create “HPopenview” 10.0.23.31:162 “TparamV1″ tdomain i
pv4_tdomain timeout 1500 retry 3 taglist trapTag mms 484
snmp-v3 target-addr create “Testpc” 172.16.0.222:162 “TparamV1″ tdomain ipv4_
tdomain timeout 1500 retry 3 taglist trapTag mms 484

#
# SNMP V3 TARGET PARAMS CONFIGURATION
#

#
# SNMP V3 NOTIFY FILTER CONFIGURATION
#

snmp-v3 ntfy-filter delete profile1 99.3.6.1.6.3.1.1.4.1

#
# SNMP V3 NOTIFY FILTER PROFILE CONFIGURATION
#

#
# SNMPLOG CONFIGURATION
#

snmp snmplog enable true
snmp snmplog maxfilesize 256
#

Can you post the relevant sections of your configuration?

Cheers!