U2.5 SNMPv1

1. network mgt protocols provide
   1. configuration management
   2. accounting
   3. event logging
2. defines network mgt security in general

1. RFC 1155-1157
2. RFC 1441-1448
3. RFC 2570-2576

Attachments:

• U2.5 SNMPv1 - architectural model

1. at least one management station
   1. acts as management role
2. a number of network elements
   1. acts as agent role

1. SNMP access MIB on top of UDP and IP

   Attachments:

   • U2.5 SNMPv1 - SNMPv1 protocol stack
   1. connectionless!!
   2. ports
      1. 161
         1. for requests (GET, SET)
      2. 162
         1. for traps

1. enables mgt station to retrieve object values from managed entity

1. enables the management station to set object values in managed entity

1. enables a managed entity to notify the management station of significant events

1. 3 parts to a PDU message
   1. version
   2. community
   3. SNMP operation

1. Assure the destination device that the SNMP PDU does come from the source from which it claims to be

1. Limit the SNMP operations that a device can request according to device's identity

1. community name
   1. All PDUs from mgt station must contain the community name

1. community profile
   1. Each device stores a community profile that specifies which MIB values and how those values can be access by an entity bearing the associated community name.

1. data modification
2. masquerade

1. message stream modification
2. eavesdropping