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4.2.7 SNMP
4.2.7.1 Community Configuration
By default, two SNMP Communities exist:
private, with 'Read/Write' privileges and status set to enable
。
public, with 'Read Only' privileges and status set to enable
。
These are well-known communities; you can use this menu to change the defaults or to add other communities. Only the
communities that you define using this menu will have access to the switch using the SNMPv1 and SNMPv2c protocols. Only
those communities with read-write level access will have access to this menu via SNMP.
You should use this menu when you are using the SNMPv1 and SNMPv2c protocol: if you want to use SNMP v3 you should use
the User Accounts menu.
Configurable Data
SNMP Community Name - You can use this screen to reconfigure an existing community, or to create a new one.
。
Use this pull-down menu to select one of the existing community names, or select 'Create' to add a new one. A
valid entry is a case-sensitive string of up to 16 characters.
Client IP Address - Taken together, the Client IP Address and Client IP Mask denote a range of IP addresses from
。
which SNMP clients may use that community to access this device. If either (IP Address or IP Mask) value is
0.0.0.0, access is allowed from any IP address. Otherwise, every client's IP address is ANDed with the mask, as is
the Client IP Address, and, if the values are equal, access is allowed. For example, if the Client IP Address and
Client IP Mask parameters are 192.168.1.0/255.255.255.0, then any client whose IP address is 192.168.1.0
through 192.168.1.255 (inclusive) will be allowed access. To allow access from only one station, use a Client IP
Mask value of 255.255.255.255, and use that machine's IP address for Client IP Address.
Client IP Mask - Taken together, the Client IP Address and Client IP Mask denote a range of IP addresses from
。
Figure 4-2-33 SNMP Community
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