Siemens SIMATIC NET ET 200SP - Page 101

Diagnostics and maintenance
6.2 Diagnostics with SNMP
CP 1542SP-1, CP 1542SP-1 IRC, CP 1543SP-1
Operating Instructions, 01/2017, C79000-G8976-C426-03
101
Supported MIB objects in SNMPv3
If SNMPv3 is enabled, the CP returns the contents of the following MIB objects:
●
MIB II (acc. to RFC1213)
The CP supports the following groups of MIB objects:
– System
– Interfaces
The "Interfaces" MIB object provides status information about the CP interfaces.
– IP (IPv4/IPv6)
– ICMP
– TCP
– UDP
– SNMP
The following groups of the standard MIB II are not supported:
– Adress Translation (AT)
– EGP
– Transmission
●
LLDP MIB
●
Siemens Automation MIB
Note that write access is permitted only for the following MIB objects of the "System"
group:
– sysContact
– sysLocation
– sysName
A set sysName is sent as the host name using DHCP option 12 to the DHCP server to
register with a DNS server.
For all other MIB objects and groups, only read access is possible for security reasons.
Access rights using community names (SNMPv1)
TCP uses the following community strings to control the permissions for access to the SNMP
agent:
Table 6- 1 Access rights in the SNMP agent
Type of access
Community string
*)
Read access
public
Read and write access private
*) Note the use of lowercase letters!