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• • Subnet information which is inferred from the above which also creates all those included IP addresses in the subnet- when/if the subnet is scanned this also generates an IP address for every possible IP in the subnet 
  • Device name
  • Location information
  • Gateways - if the device has two or more interfaces and has location information it is added as a gateway for it's subnets.

NOTES \ CAVEATS

for OAE / \ NMIS imports (as of release 1.0.5)

• • The time and frequency of the import is controlled through cron (/etc/cron.d/opaddress) the default being at 01:11 and 01:21. 
  • OpenAudit must be Enterprise edition as we make use of the API feature for import
  • Gateways are only added if they have a location
  • NMIS import is only known to work with localhost not remote hosts (it may operate for opHA enabled servers but not currently tested ver1.0.5)
    
    

• 30 minute interval subnet_scan process

  • Every IP address in every known subnet is pinged

    • This is done in batches of 50 addresses to limit impact
    • The kick of the batch process is what creates "Addresses" in the address table if they do not already exist.
    • At the start end of each subnet scan batch the ARP tables of the gateways for that subnet are queried for MAC addresses and these MACs are created as endpoints

  • If a live IP is found 

    • The address "Operational Status" is changed to "reachable"

    • The address "Administrative Status" is changed - what it changes to is configurable in opCommon.nmis  / 'opaddress_default_address_state'.  I recommend changing this to "allocated" from the default undef/"unkonwn"

    • The address is associated with a an endpoint / MAC address found from the ARP entry / endpoint table if an ARP entry is available for it

  • At the end of the subnet_scan the DNS lookups are completed for the live IPs to attempt to find a name.  

  • NOTES:

    • The subnet will only be scanned if it's "admin status" is "allocated" or "unallocated" 
      • auto added subnets default to Allocated
      • manually added subnets default to unknown or rather the dropdown when adding subnets manually defaults to unknown.
      • If you do not want an automatically added subnet to be scanned then change the admin status to something such as delegated or unmanaged.
    • An IP address will NOT be pinged if the address has had it's "administrative status" changed to "unmanaged", "delegated" or "reserved"

...

• Manually Entered data

  • You can manually add or modify all classes of information - addresses, subnets, gateways etc.
  • Subnets are the primary information one would manually add  (typically those not found by import from OAE and NMIS).
    • You must at this time enter the subnet in CIDR notation (x.x.x.x/y) for both the NAME field and the Subnet field.
    • You should change the subnets administrative status from "unknown" to "allocated" or "unallocated" if you would like it to be scanned; else if you do not want it scanned change it to "delegated" or "unmanaged" or leave it as "unknown"
    • The adding of a subnet will not create it;'s addresses in the address table, the addresses in the address table are only added once this subnet is scanned, or if the addresses are added manually.
  • You can manually add gateways, with a list of the subnets they cover
  • You can add IP address information manually
  • You can Bulk edit address information 
    • A good example is to denote DHCP ranges, one would bulk edit the address range and change the "type" from "static" to "dynamic" to denote DHCP.

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