> ## Monitoring

> This chapter discusses the following monitoring options:

> - Version: Provides version information for the Access Point's system components.
> - ICMP: Displays statistics for Internet Control Message Protocol packets sent and received by the AP.
> - IP/ARP Table: Displays the AP's IP Address Resolution table.
> - Learn Table: Displays the list of nodes that the AP has learned are on the network.
> - IAPP: Provides statistics for the Inter-Access Point Protocol messages sent and received by the AP.
> - RADIUS: Provides statistics for the configured RADIUS server(s).
> - Interfaces: Displays the Access Point's interface statistics (Wireless and Ethernet).
> - Station Statistics: Displays statistics for stations and Wireless Distribution System links.
> - Mesh Statistics (AP-4000M and AP-4900M only): Displays statistics for the Mesh portal, including the network topology and the Neighbor Table.

> To monitor the AP using the HTTP/HTTPS interface, you must first log in to a web browser. See Logging In for instructions.

> You may also monitor the AP using the command line interface. See Command Line Interface (CLI) for more information

> To monitor the AP via HTTP/HTTPS:

> 1. Click the Monitor button located on the left-hand side of the screen. The main Monitor screen will be displayed.

> Figure 5-1 Monitor Main Screen
> 2. Click the tab that corresponds to the statistics you want to review. For example, click Learn Table to see the list of nodes that the AP has discovered on the network.
> 3. If necessary, click the Refresh button to update the statistics.

> Each Monitor tab is described in the remainder of this chapter.

> ## Version

> From the HTTP interface, click the Monitor button and select the Version tab. The list displayed provides you with information that may be pertinent when calling Technical Support. With this information, your Technical Support representative can verify compatibility issues and make sure the latest software are loaded. This screen displays the following information for each Access Point component:

> - Serial Number: The component's serial number, if applicable.
> - Component Name ID: The AP identifies a system component based on its ID. Each component has a unique identifier.
> - Variant: Several variants may exist of the same component (for example, a hardware component may have two variants, one with more memory than the other).
> - Version: Specifies the component's version or build number. The Software Image version is the most useful information on this screen for the typical end user.

> Figure 5-2 Version Monitoring Tab

> ## ICMP

> This tab provides statistical information for both received and transmitted messages directed to the AP. Not all ICMP traffic on the network is counted in the ICMP (Internet Control Message Protocol) statistics.

> Figure 5-3 ICMP Monitoring Tab

> ## IP/ARP Table

> This tab provides information based on the Address Resolution Protocol (ARP), which relates MAC Address and IP Addresses.

> Figure 5-4 IP/ARP Table Monitoring Tab

> ## Learn Table

> This tab displays information relating to network bridging. It reports the MAC address for each node that the device has learned is on the network and the interface on which the node was detected. There can be up 10,000 entries in the Learn Table.

> Figure 5-5 Learn Table Monitoring Tab

> ## IAPP

> This tab displays statistics relating to client handovers and communications between ORiNOCO Access Points.

> Figure 5-6 IAPP Monitoring Tab

> ## RADIUS

> This tab provides RADIUS authentication, EAP/802.1x authentication, and accounting information for both the Primary and Backup RADIUS servers for each RADIUS Server Profile.

> NOTE: Separate RADIUS servers can be configured for each RADIUS Server Profile.

> Select the RADIUS Server Profile to view statistics on from the Select Server Profile drop-down menu.

> Figure 5-7 RADIUS Monitoring Tab

> ## Interfaces

> This tab displays statistics for the Ethernet and wireless interfaces.

> Figure 5-8 Interface Monitoring Tab (Ethernet)

> ### Description of Interface Statistics

> The following statistics are displayed for the Ethernet interface only, either of the wireless interfaces only, or for all interfaces:

> - Admin Status (Ethernet/Wireless-Slot A/B): The desired state of the interface: Up (ready to pass packets), Down (not ready to pass packets, or Testing (testing and unable to pass packets).
> - Alignment Error (Ethernet): The number of frames received that are not an integral number of octets in length and do not pass the Frame Check Sequence check.
> - Carrier Sense Errors (Ethernet): The number of times that the carrier sense condition was lost or never asserted when attempting to transmit a frame. The count increments at most once per transmission attempt.
> - Deferred Transmission (Ethernet): The number of frames for which the first transmission attempt is delayed because the medium is busy.This number does not include frames involved in collisions.
> - Description (Ethernet/Wireless-Slot A/B): Information about the interface (e.g., the name of the manufacturer, the product name and the version of the hardware interface).
> - Duplicate Frame Count (Wireless-Slot A/B): The number of duplicate frames received.
> - Ethernet Chipset (Ethernet): Identifies the chipset used to realize the interface.
> - Excessive Collisions (Ethernet): The number of frames for which transmission fails due to excessive collisions.
> - Failed ACK Count (Wireless-Slot A/B): The number of times an acknowledgment (or ACK) is not received when expected.
> - Failed Count (Wireless-Slot A/B): The number of packets not transmitted successfully due to too many transmit attempts.
> - Failed RTS Count (Wireless-Slot A/B): The number of times a Clear to Send (CTS) is not received in response to a Request to Send (RTS).
> - FCS Error (Wireless-Slot A/B): The number of Frame Check Sequence errors detected in received MAC Protocol Data Units (MPDUs).
> - FCS Errors (Ethernet): The number of frames received that are an integral number of octets in length but do not pass the Frame Check Sequence check.
> - Frames Too Long (Ethernet): The number of frames received that exceed the maximum permitted frame size.
> - In Discards (Ethernet/Wireless-Slot A/B): The number of error-free inbound packets that were chosen to be discarded to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space.
> - In Errors (Ethernet/Wireless-Slot A/B): The number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol.
> - In Non-unicast Packets (Ethernet/Wireless-Slot A/B): The number of non-unicast (i.e., subnetwork-broadcast or subnetwork-multicast) packets delivered to a higher-layer protocol.
> - In Octets (bytes) (Ethernet/Wireless-Slot A/B): The total number of octets received on the interface, including framing characters.
> - In Unicast Packets (Ethernet/Wireless-Slot A/B): The number of subnetwork unicast packets delivered to a higher-layer protocol.
> - Internal MAC Receive Errors (Ethernet): The number of frames for which reception fails due to an internal MAC sublayer transmit error. A frame is only counted if it is not counted by the Frames Too Long, Alignment Error, or FCS Error counters.
> - Internal MAC Transmit Errors (Ethernet): The number of frames for which transmission fails due to an internal MAC sublayer transmit error. A frame is only counted if it is not counted by Late Collision, Excession Collision, or Carrier Sense Error counters.
> - Last Change (Ethernet/Wireless-Slot A/B): The value of the sysUpTime object at the time the interface entered its current operational state.
> - Late Collisions (Ethernet): The number of times that a collision is detected on a particular interface later than 512 bit-times into the transmission of a packet
> - MAC Address (Wireless-Slot A/B): The station's assigned, unique MAC address,
> - Maximum Packet Size (Ethernet/Wireless-Slot A/B): The size (in octets) of the largest datagram which can be sent/received
> - MIB Specific Definition (Ethernet/Wireless-Slot A/B): A reference to MIB definitions specific to the particular media being used to realize the interface. For example, if the interface is an Ethernet interface, then this field refers to a document defining objects specific to ethernet.
> - Multicast Received Frame Count (Wireless-Slot A/B): The number of multicast packets received.
> - Multicast Transmitted Frame Count (Wireless-Slot A/B): The number of multicast packets transmitted.
> - Multiple Collision Frames (Ethernet): The number of successfully transmitted frames for which transmission is inhibited by more than one collision.
> - Multiple Retry Count (Wireless-Slot A/B): The number of packets successfully transmitted after more than one retransmission.
> - Operational Status (Ethernet/Wireless-Slot A/B): The current state of the interface: Up (ready to pass packets), Down (not ready to pass packets, or Testing (testing and unable to pass packets).
> - Out Discards (Ethernet/Wireless-Slot A/B): The number of error-free outbound packets chosen to be discarded to prevent their being transmitted. One possible reason for discarding such a packet could be to free up buffer space.
> - Out Errors (Ethernet/Wireless-Slot A/B): The number of outbound packets that could not be transmitted because of errors.
> - Out Non-unicast Packets (Ethernet/Wireless-Slot A/B): The total number of packets that higher-level protocols requested be transmitted to a non-unicast (i.e., a subnetwork-broadcast orsubnetwork-multicast) address, including those that were discarded or not sent.
> - Out Octets (bytes) (Ethernet/Wireless-Slot A/B): The total number of octets transmitted out of the interface, including framing characters.
> - Out Unicast Packets (Ethernet/Wireless-Slot A/B): The total number of packets that higher-level protocols requested be transmitted to a subnetwork-unicast address, including those that were discarded or not sent.
> - Output Queue Length (Ethernet/Wireless-Slot A/B): The length of the output packet queue (in packets).
> - Physical Address (Ethernet): The interface's address at the protocol layer immediately below the network layer in the protocol stack.
> - Received Fragment Count (Wireless-Slot A/B): The number of successfully received Data or Management MAC Protocol Data Units (MPDUs).
> - Retry Count (Wireless-Slot A/B): The number of packets successfully transmitted after one or more retransmissions.
> - Single Collision Frames (Ethernet): The number of successfully transmitted frames for which transmission is inhibited by exactly one collision
> - Speed (Ethernet/Wireless-Slot A/B): An estimate of the interface's current bandwidth in bits per second.
> - SQE Test Errors (Ethernet): The number of times that the Signal Quality Error (SQE) Test Error message is generated by the physical layer signalling (PLS) sublayer.
> - Successful RTS Count (Wireless-Slot A/B): The number of times a Clear to Send (CTS) is received in response to an Request to Send (RTS).
> - Transmitted Fragment Count (Wireless-Slot A/B): The number of transmitted fragmented packets.
> - Transmitted Frame Count (Wireless-Slot A/B): This number of successfully transmitted packets.
> - Type (Ethernet/Wireless-Slot A/B): The type of interface, distinguished according to the physical/link protocol(s) immediately below the network layer in the protocol stack.
> - Unknown Protocols (Ethernet/Wireless-Slot A/B): The number of packets received that were discarded because of an unknown or unsupported protocol.
> - WEP Undecryptable Count (Wireless-Slot A/B): The number of undecryptable WEP frames received.

> ## Station Statistics

> This tab displays information on wireless clients attached to the AP and on Wireless Distribution System links.

> Enable the Monitoring Station Statistics feature (Station Statistics are disabled by default) by checking Enable Monitoring Station Statistics and click OK.

> You do not need to reboot the AP for the changes to take effect. If clients are connected to the device or WDS links are configured for the device, the statistics will now be shown on the screen.

> Click on the Refresh button in the browser window to view the latest statistics. If any new clients associate to the AP, you can see the statistics of the new clients after you click the refresh button.

> Figure 5-9 Station Statistics Monitoring Tab

> ## Description of Station Statistics

> The following stations statistics are displayed:

> - MAC Address: The MAC address of the wireless client for which the statistics are gathered. For WDS links, this is the partner MAC address of the link.
> - IP Address: The IP address of the associated wireless station for which the Statistics are gathered. (0.0.0.0 for WDS links)
> - Interface to which the Station is connected: The interface number on which the client is connected with the AP. For WDS links this is the interface on which the link is configured.
> - Station Type: The type of wireless client (STA or WDS).
> - MAC Protocol: The MAC protocol for this wireless client (or WDS link partner). The possible values are 4.9 GHz, 802.11a, 802.11b, 802.11g
> - Signal / Noise: The Signal /Noise Level measured at the AP when frames are received from the associated wireless station (or WDS link partner)
> - Time since Last Packet Received: The time elapsed since the last frame from the associated wireless station (or WDS link partner) was received.
> - Number of Clients: The number of stations and WDS links monitored.

> The following stations statistics are available through SNMP:

> - Octets Received: The number of octets received from the associated wireless station (or WDS link partner) by the AP.
> - Unicast Frames Received: The number of Unicast frames received from the associated wireless station (or WDS link partner) by the AP.
> - Non-Unicast Frames Received: The number of Non-Unicast frames received (i.e. broadcast or multicast) from the associated wireless station (or WDS link partner) by the AP.
> - Octets Transmitted: The number of octets sent to the associated wireless station (or WDS link partner) from the AP.
> - Unicast Frames Transmitted: The number of Unicast frames transmitted to the associated wireless station (or WDS link partner) from the AP.

> ## Mesh Statistics (AP-4000M and AP-4900M only)

> This tab displays statistics relating to the Mesh portal: the network topology or the Neighbor Table. Selecting Network Topology displays a tree structure representing the Mesh network. Selecting Neighbor Table (shown below) displays the MAC address, channel, path cost, number of hops, RSSI, type, and status of all Mesh APs within range of the AP.

> Figure 5-10 Mesh Statistics Monitoring Tab (Neighbor Table)

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