Why am I seeing the message "Device mapping does not exist for this map"?

This error is encountered when configuring a seed file for Layer2 mapping.

To start with, OpManager checks whether the given seed device is a Router or L3 Switch based on the criteria mentioned below: 

Criteria for Router :

.1.3.6.1.2.1.4.1 - IpForwarding should be 1

.1.3.6.1.2.1.4.20.1.1 - Should return more than two interfaces.

Criteria for Switch :

.1.3.6.1.2.1.17.1.4.1.1 - Bridge mib should be implemented.

OpManager queries the OIDs in following order : First CDP/LLDP OIDs, next IP routing table, then, if there is a switch connection, it queries the Bridge MIB and then ARP cache table. If OpManager is not able to get any device connection to the seed router/L3 switch, the error message "Device mapping does not exist for this map" is displayed.

Both the seed device (router/L3 switch) and the devices in the given IP range should be SNMP enabled

List of OIDs used for Layer2 Discovery : BRIDGE-MIB :

  • .1.3.6.1.2.1.17.4.3.1.1 
  • .1.3.6.1.2.1.17.4.3.1.2 
  • .1.3.6.1.2.1.17.4.3.1.3 
  • .1.3.6.1.2.1.17.1.4.1.1
  • .1.3.6.1.2.1.17.1.4.1.2 

RFC1213.MIB (NetToMediaTable) 

  • .1.3.6.1.2.1.4.22.1.1 
  • .1.3.6.1.2.1.4.22.1.2 
  • .1.3.6.1.2.1.4.22.1.3 
  • .1.3.6.1.2.1.4.22.1.4

RFC1213 (IPRouteTable) 

  • .1.3.6.1.2.1.4.21.1.1 
  • .1.3.6.1.2.1.4.21.1.2 
  • .1.3.6.1.2.1.4.21.1.7 
  • .1.3.6.1.2.1.4.21.1.8 
  • .1.3.6.1.2.1.4.21.1.11

CISCO-CDP.MIB 

  • .1.3.6.1.4.1.9.9.23.1.2.1.1.4 
  • .1.3.6.1.4.1.9.9.23.1.2.1.1.7 
  • .1.3.6.1.4.1.9.9.23.1.2.1.1.9 

LLDP.MIB

  • .1.0.8802.1.1.2.1.4.1.1.4
  • .1.0.8802.1.1.2.1.4.1.1.5
  • .1.0.8802.1.1.2.1.4.1.1.8
  • .1.0.8802.1.1.2.1.4.1.1.9
  • .1.0.8802.1.1.2.1.4.1.1.12

IF-MIB :

  • ifIndex - .1.3.6.1.2.1.2.2.1.1
  • ifName - .1.3.6.1.2.1.31.1.1.1.1

 

 

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