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Changing community strings

If you have Read/Write/All access authority, you can modify the SNMP community strings for access to the device through Device Manager.

To change SNMP community strings:

  1. From the Device Manager menu bar, choose Edit > Security.
  2. The Security dialog box opens with the Access Policy tab displayed.
  3. Click the SNMP tab.
  4. The SNMP tab opens.

Table 11 describes the SNMP tab items.


Item Description
ReadWriteAll
The first string with which the community string of an incoming SNMP message is compared. If the community string matches this string, Read/Write acces is granted to all items in the MIB. If it does not match, the community string is compared to the next string.
ReadWrite
ReadWriteLayer3
ReadWriteLayer2
ReadWriteLayer1
The second, third, fourth, and fifth strings respectively with which the community string of an incoming SNMP message is compared.Once a match is made, Read/Write acces is granted to the appropriate items in the MIB. If no match is made, the community string is compared to the ReadOnly string.
ReadOnly
The sixth and final string with which the community string of an incoming SNMP message is compared. If the community string matches this string, ReadOnly acces is granted to all items in the MIB accept community strings. (Community strings appear empty when read.) If no match is made, no access is granted, no response is sent back to the SNMP requester, and SNMP traps are sent to the SNMP trap receivers if configured.
OutTooBigs
The total number of SNMP PDUs generated by the SNMP protocol entity for which the value of the error-status field is "too big."
OutNoSuchNames
The total number of SNMP PDUs generated by the SNMP protocol entity for which the value of the error-status field had "no such name."
OutBadValues
The total number of SNMP PDUs generated by the SNMP protocol entity for which the value of the error-status field had a "bad value."
OutGenErrors
The total number of SNMP PDUs generated by the SNMP protocol entity for which the value of the error-status field had "generated errors."
InBadVersions
The total number of SNMP PDUs delivered to the SNMP protocol entity that were for an unsupported SNMP version
InBadCommunityNames
The total number of SNMP PDUs delivered to the SNMP protocol entity that used an unknown SNMP community name.
InBadCommunityUses
The total number of SNMP PDUs delivered to the SNMP protocol entity that required an SNMP operation that is not allowed by this community.
InASNParseErrs
The total number of ASN.1 or BER errors encountered by the SNMP protocol entity when decoding received SNMP messages.
InTooBigs
The total number of SNMP PDUs delivered to the SNMP protocol entity for which the value of the error-status field is "too big."
InNoSuchNames
The total number of SNMP PDUs delivered to the SNMP protocol entity for which the value of the error-status field had "no such name."
InBadValues
The total number of SNMP PDUs delivered to the SNMP protocol entity for which the value of the error-status field had a "bad value."
InReadOnlys
The total number of SNMP PDUs delivered to the SNMP protocol entity for which the value of the error-status field is "read-only."
Note: It is a protocol error to generate an SNMP PDU that contains the value "readOnly" in the error-status field. This field is provided as a means of detecting incorrect implementations of the SNMP.
InGenErrors
The total number of SNMP PDUs delivered to the SNMP protocol entity for which the value of the error-status field had "generated errors."

  1. In the SNMP tab, enter the necessary information.
  2. Click Apply.

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