ZyXEL Communications OLT2406, Руководство пользователя

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Chapter 44 Access Control
OLT2406 User’s Guide
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The following table describes the labels in this screen.
44.7 Technical Reference
This section provides technical background information on the topics discussed in this chapter.
44.7.1 About SNMP
Simple Network Management Protocol (SNMP) is an application layer protocol used to manage and
monitor TCP/IP-based devices. SNMP is used to exchange management information between the
network management system (NMS) and a network element (NE). A manager station can manage and
monitor the OLT through the network via SNMP version 1 (SNMPv1), SNMP version 2c or SNMP version 3.
The next figure illustrates an SNMP management operation. SNMP is only available if TCP/IP is
configured.
Figure 225 SNMP Management Model
An SNMP managed network consists of two main components: agents and a manager.
Table 172 Management > Access Control > Remote Management
LABEL DESCRIPTION
Entry This is the client set index number. A “client set” is a group of one or more “trusted computers”
from which an administrator may use a service to manage the OLT.
Active Select this check box to activate this secured client set. Clear the check box if you wish to
temporarily disable the set without deleting it.
Start Address
End Address
Configure the IP address range of trusted computers from which you can manage this OLT.
The OLT checks if the client IP address of a computer requesting a service or protocol matches
the range set here. The OLT immediately disconnects the session if it does not match.
Telnet/FTP/
HTTP/ICMP/
SNMP/SSH/
HTTPS Select services that may be used for managing the OLT from the specified trusted computers.
Apply Click Apply to save your changes to the OLT’s run-time memory. The OLT loses these changes if it
is turned off or loses power, so use the Save link on the top navigation panel to save your
changes to the non-volatile memory when you are done configuring.
Cancel Click Cancel to begin configuring this screen afresh.