The issue the customer is seeing is that he did an SNMPWALK on the VPN that has been working for some time ok but after the snmpwalk command was done the VPN needed rebooting and upon boot up came up with the following error :
...Invalid checksum for section 7: expected 00000002, actual 00000000
NVRAM section 7 (PROBE) invalid, total invalid sections: 1
Invalid Checksum for NVRAM Section 7...Clearing contents
Or has the SNMPWALK got nothing to do with the invalid checksum.
SNMPWALK is performed by doing the following :