SNMP
The SNMP protocol support is an important feature of all communication devices because it allows the system administrator to manage the operation of a network as a whole, as well as of each component.
SNMP section contains a set of parameters to exchange data about network activity of the device.
The SNMP Protocol has two sides, the agent and the management stations:
The agent sends data to the management station
The management station collects data from all the agents on the network. You can set several destinations of traps with individual set of traps as well as several users with individual access rights.
The agent sends alerts called traps (see Traps zone) and answers requests that were sent by the management station
The management station captures and decodes the traps. The management station also requests specific information from the agent.
The information is passed through requests and replies with the use of the MIB
The management station is responsible for decoding the SNMP packets and providing an interface to the administrator. The interface can be a GUI or a command line.
Access
In the "Access" section, you can view and edit the current SNMP access settings; you can delete the current SNMP v.3 users by clicking the «Remove User» button or create new ones by clicking the «Add SNMP v.3 User» button:
Start SNMP
Enable/disable SNMP daemon in the device.
Version 1 enable
Enable/disable SNMP v.1 and v.2c support.
The first version of the SNMP protocol lacks security in the operation of the protocol itself, which hinders its use for network management, so SNMP v.1 and v.2c works only in read-only mode.
By default, it is enabled.
Community
Set the community name for read-only mode (SNMP v.1 and v.2c only).
The default SNMP v.1 and v.2c community name is "public".
It is a security method for SNMP v.1 and v.2c, as Agents can be set to reply only to queries received by accepted community names.
In SNMP v.1 and v.2c the community name passes along with the data packet in clear text.
Contact
Set the contact information.
Used as a reference information about the device owner.
Location
Set the geographical location where the unit is installed.
Used as a reference information about physical device’s location.
User Name
Set the authorization user name of SNMP v.3.
Password
Set the authorization password of SNMP v.3.
Security
Set the security level:
the lowest level means no authentication or privacy (No Authorization No Privacy), you have to set the User Name only.
the medium level means authorization and no privacy (Authorization No Privacy), you have to set User Name and Password.
the highest level means authorization and privacy (Authorization and Privacy), you have to set the User Name, Password and Privacy Password.
Read only
Enable/disable the read-only permission.
Read/Write is the default value.
Admin
Enable/disable the full access to the variables.
For example: ability to reboot the device.
Limited access is the default value.
Privacy Password
Set the privacy password.
It is necessary when privacy is enabled for the required security level.
Traps
SNMP protocol operation requires a network agent instance to send asynchronous messages (traps) whenever a specific event occurs on the controlled device (object). Astra Wireless units have a built-in "SNMP Traps" support module (which acts as an agent) that performs a centralized information delivery from unit internal subsystems to the SNMP server. This zone focuses on "SNMP Traps" agent configuration.
In this section, you can view and edit the current "SNMP traps" settings. You can clone, remove and clear target and traps by clicking the corresponding buttons:
Enable SNMP Traps
Enable/disable to send "SNMP traps".
Agent IP
Set the IP address of the device which sends traps.
Transport
Set the transport method.
Two options are available:
“IP” - all SNMP traps are sent to the server specified in the “Destination” field below.
“MINT Gateway” - this option should be used when the SNMP server is located beyond a gateway that acts as an SNMP agent for the whole MINT network.
Gateway MAC
Set the MAC address of the gateway in your MINT network (relay device) if you selected “MINT Gateway” option.
If there's no MAC address specified, all "SNMP traps" are sent to the MINT SNMP relay.
The relay can be specified by checking the "Trap Gateway" check-box in the "Link Settings" section.
Destination
Set the IP address of the server and the UDP port (162 port is commonly used).
SNMP trap types
The check boxes below specify traps or trap groups that are sent to the server:
topoGroup
Events about topology changes in MINT network.
topoEvent
Number of neighbors or their status has changed (full neighbor list).
newNeighborEvent
The new Neighbor has appeared.
lostNeighborEvent
The Neighbor has been lost.
radioGroup
Events which are related to changes of radio link parameters.
radioFreqChanged
The Frequency has changed.
radioBandChanged
The Band has changed.
mintGroup
Events about link quality changes in MINT network.
mintRetries
Retries has changed by more than 10%.
mintBitrate
The Bitrate has changed.
mintSignalLevel
Signal Level has changed by more than 10%.
ospfGroup
Events about OSPF table changes in MINT network.
ospfNBRState
The State of the relationship with this Neighbor has changed.
ospfVirtNBRState
The State of the relationship with this Virtual Neighbor has changed.
ospfIFState
The State of the OSPF Interface has changed.
ospfVirtIFState
The State of the Virtual OSPF Interface has changed.
ospfConfigError
Parameters conflict in the configuration of 2 routers.
others
Other changes in MINT network.
linkEvent
One of the communication links represented in the agent’s configuration has come up or come down.
trapdColdStartEvent
Cold Start event has occurred.
snmpdAuthenticationFailureEvent
Not properly authenticated SNMP protocol message has been received.
syslog
Events about messages recorded in a system log.
Click the «Clone» button if you need to setup multiple SNMP servers. Each server can have an individual set of traps directed toward it.
Click the «Clear» button in order to clear all check-boxes for the current server.
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