Configuring Network Manager to use GetBulk

You can configure the SNMP Helper to use GetBulk. You can also exclude specific devices from GetBulk support.

If you configure the SNMP Helper to use GetBulk, then this will apply to all pollers in the current domain. The SNMP Helper will also use GetBulk for all devices in the domain accessed using SNMP v2 or SNMP v3, unless you exclude specific devices as described in the following steps.
Note: When GetBulk is enabled, then for each GetBulk-capable device, a GetBulk request is always sent instead of a GetNext request.

To configure the SNMP Helper to use GetBulk, perform the following steps.

  1. Edit the following configuration file: NCHOME/etc/precision/NcPollerSchema.cfg.
    Note: You can make the NcPollerSchema.cfg file domain specific by copying it to NCHOME/etc/precision/NcPollerSchema.DOMAIN_NAME.cfg, where DOMAIN_NAME is the name of the domain.
  2. Find the insert into the config.properties database and set the value for the UseGetBulk property to 1.
  3. Save the file NCHOME/etc/precision/NcPollerSchema.cfg.
  4. Optional: If you have network devices that do not support GetBulk, then you can exclude these network devices on a device-by-device basis by performing the following steps:
    1. Edit the following configuration file: NCHOME/etc/precision/ SnmpStackSecurityInfo.cfg.
      Note: You can make the SnmpStackSecurityInfo.cfg file domain-specific by copying it to NCHOME/etc/precision/SnmpStackSecurityInfo.DOMAIN_NAME.cfg, where DOMAIN_NAME is the name of the domain.
    2. For each device that you want to exclude from GetBulk support, add an insert into the SnmpStackSecurityInfo.cfg configuration file, similar to the following example.
      The following example insert excludes the device 10.0.13.74 from GetBulk support.
      insert into snmpStack.accessParameters
    ( m_NetAddress, m_UseGetBulk )
values
    ( '10.0.13.74', 0 );
    3. Once you have added inserts for each of the devices to exclude, save the file NCHOME/etc/precision/ SnmpStackSecurityInfo.cfg.
  5. Activate the changes by performing one or both of the following:
    • Start or schedule a new full discovery. Discovery will now make use of GetBulk.
    • Restart the Polling engine, ncp_poller, with the -readsnmpconfig command-line option specified.