![[previous]](../../../graphics/l_arrow.gif){kind=icon}
![[next]](../../../graphics/r_arrow.gif){kind=icon}
This chapter describes the details for performing the system monitoring on the OfficeConnect Remote 840.
The OfficeConnect Remote 840 Manager provides a wide range of monitor screens, including real-time throughput graphs, routing tables, and interface and protocol counters. The screens help to troubleshoot connection problems and are grouped by topic below.
Real-time throughput graphs display both the transmit and receive ATM throughput for up to four remote site connections. To access this screen, go to the OfficeConnect Remote 840 Manager home page and select Monitor > ATM Throughput.
The throughput is displayed as line graphs that move from left to right across the screen. The color-coded list of remote site names to the right of the graphs correspond to the colored lines on the graph. A maximum of four remote sites are monitored simultaneously. Performance is measured in kilobytes per second (Kbps), with samples taken every five seconds. The maximum throughput for all remote site connections combined is determined by the service provider when the SDSL link comes up. This maximum can be calculated from the negotiated SDSL baud and constellation rates (see ATM Interface section below.)
Because the SDSL link is shared by all remote site connections, the throughput for a specific connection varies depending on the traffic of the other connections. If one connection is using most of the bandwidth, there is less available for the other connections. Throughput also depends on the type of traffic on the connection. For example, downloading a text file from the Internet may generate a very low volume of incoming traffic, while receiving high resolution graphics display will cause the received throughput to increase dramatically.
Figure 11¯1 Throughput Graphs
The Interface Status screen provides real-time information about the interfaces. To bring up this screen, from the OfficeConnect Remote 840 Manager home page, select Monitor > Interface Status. Ethernet interface information is displayed in the row containing the interface name eth:1.
The Oper Status column indicates whether the interface link is operationally up or down. If it is down, there may be a cabling problem. The Admin Status is set to up by default. If the Admin Status is down, then the interface has been disabled by a user and will not operate until it is re-enabled. (Use CLI to enable or disable the operational state.)
The Ethernet counters screen shows real-time counters based on data packets that cross the Ethernet interface. Access this screen from the OfficeConnect Remote 840 Manager home page by selecting Monitor > Ethernet.
The counters displayed include the number of bytes transmitted, bytes received, and errors.
Error counters may not increment consistently. For example, rebooting the device may generate a few interface errors as the hardware resets. Errors that increase rapidly and consistently indicate a problem, either in the LAN connection, a connected device, or the OfficeConnect Remote 840 hardware.
The Interface Status screen provides real-time information about the interfaces. To bring up this screen, from the OfficeConnect Remote 840 Manager home page, select Monitor > Interface Status. ATM interface information is displayed in the row containing the interface name atm:1 or hdlc:1.
The Oper Status column indicates whether the interface link is operationally up or down. If it is down, there may be a cabling problem. The Admin Status is set to up by default. If this field says down, then the interface has been disabled by a user and will not operate until it is re-enabled. Use CLI to enable or disable the operational state.
You can view real-time cell status from the ATM Status screen. To access this screen from the OfficeConnect Remote 840 Manager home page, select Monitor > ATM.
The information includes Cell Delineation status, Data and Idle Cell counters, and error detection, all of which are used to determine the health of your ATM link. A few error counts are not unusual but errors which increment consistently should be reported to your service provider. 
The transceiver status screen provides line information that can be useful to the service provider when you experience line problems. Access this information in the Monitor > SDSL > Transceiver Status screen. 
When the line is up, the Link Status is "Link Up." Any other status should be reported to the service provider. Other values may help the service provider identify line problems.
You can view remote site connection traffic and error counters. From the OfficeConnect Remote 840 Manager home page select Monitor > Remote Sites > Remote Site Counters. Then select the remote site name from the list and press the Show button.
The counters include the number of packets and bytes transmitted and received and error counters. The error counters may increment occasionally, and should be ignored unless they increment quickly and consistently. Rapidly increasing errors should be reported to the service provider
To view a complete list of configured remote site profiles and their status, access the Remote Site Status screen by selecting Monitor > Remote Sites > Remote Site Status.
The status table includes the configured network service, VPI and VCI for each remote site as well as the operational status of the profile. 
IP networks are created when you configure IP over the LAN and when a remote site connection is configured to route IP traffic. To view the list of IP networks and their status, bring up the Network Status screen. This screen lists the status of all OfficeConnect Remote 840 IP, IPX, and Bridge networks. To see this screen, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Networks > Network Status.
The network status table shows the network name, the protocol, the interface over which the network runs (eth:1 for LAN, atm:1 or hdlc:1 for WAN), how the network was created (static for LAN, dynamic for WAN) and the network address assigned to the connection. IP and IPX WAN network names incorporate the name of the remote site profile.
Below is an example of a network status table. IP Routing Table:
The IP routing table contains the list of all IP routes known by the OfficeConnect Remote 840. To view the IP routing table, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Routes and Services > IP Routes.
Routes that were put in the table when a network came up have the protocol type of LOCAL. STATIC routes are those that have been configured statically. The protocol type of RIP indicates routes that were learned from IP RIP information exchange with other routers. The interface indicates whether the network is accessible from the LAN (eth:1) or WAN (atm:1 or hdlc:1) interface. 
The Address Resolution Protocol (ARP) table displays the list of IP addresses and their associated hardware addresses that have been learned using ARP. The table is built dynamically. To view this table, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Networks > IP > ARP Table.
The OfficeConnect Remote 840 Manager provides various counters and tables for the IP, TCP, UDP and ICMP protocols. To get to the counter and table screens, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Networks > IP. Select the desired counters from the screen shown below:
Workstations on the LAN 'lease' IP addresses from the OfficeConnect Remote 840 when it is the DHCP Server.
You can view all of the currently outstanding leases by examining the DHCP Lease Table. From the OfficeConnect Remote 840 Manager home page select Monitor > Networks > DHCP > DHCP Leases.
Each lease table entry lists the IP address and lease duration assigned to each client hardware (MAC) address.
You can obtain detailed statistics and error counters for the DHCP protocol. Access this screen from the OfficeConnect Remote 840 Manager home page by selecting Monitor > Networks > DHCP > DHCP Counters.
You can view the dynamic Network Address Translation (NAT) and Port Address Translation (PAT) mapped address table. To access this table from the OfficeConnect Remote 840 Manager home page, select Monitor > Networks > NAT/PAT. Select the remote site profile whose address translations you want to look at, and then select Mapped Addresses.
This table is created when the OfficeConnect Remote 840 is configured to use address translation before routing IP packets to the remote location. The mapped addresses table keeps track of private-to-public address mappings.
Table of Port AssignmentsThe OfficeConnect Remote 840 address translation process also creates a dynamic port assignment table when NAT or PAT is used. To access this table from the OfficeConnect Remote 840 Manager home page, select Monitor > Networks > NAT/PAT. Select the remote site profile whose address translations you want to look at, and then select Port Assignments.
This table is created when the OfficeConnect Remote 840 is configured to use address translation before routing IP packets to the remote location. The port address translation table keeps track of private-to-public address and port mappings and shows the length of time (seconds) before the translation expires.
IPX networks are created when you configure IPX over the LAN and when a remote site connection is established that is configured to route IPX traffic. To view the list of IPX networks and their status, bring up the Network Status screen. This screen list the status of all OfficeConnect Remote 840 IP, IPX, and Bridge networks. To see this screen, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Networks > Network Status.
The network status table shows the network name, the protocol, the interface over which the network runs (eth:1 for LAN, atm:1 or hdlc:1 for WAN), how the network was created (static for LAN, dynamic for WAN) and the network address assigned to the connection. IP and IPX WAN network names incorporate the name of the remote site profile.
An example of the network status table is provided below. 
The IPX routing table contains the list of all IPX routes known by the SDSL router. To view the IPX routing table, from the OfficeConnect Remote 840 Manager home page, select Monitor > Routes and Services > IPX Routes.
Routes that were put in the table when a network came up have the protocol type of OTHER. STATIC routes are those that have been configured statically. The protocol type of RIP indicates routes that were learned from IPX RIP information exchange with other routers. 
The IPX services table contains the list of all IPX servers known to the OfficeConnect Remote 840. To view the IPX services table, go to the OfficeConnect Remote 840 Manager home page and select Monitor > Routes and Services > IPX Services.
The services table contains statically configured services as well as those learned through SAP. If the server type is a well known type, it is displayed in text, otherwise its hex value is displayed.
Bridge networks are created when you configure bridging over the LAN and when a remote site connection is established that is configured to bridge traffic. To view the list of bridge networks and their status, bring up the Network Status screen. This screen lists the status of all OfficeConnect Remote 840 IP, IPX, and bridge networks. To see this screen, from the OfficeConnect Remote 840 Manager home page, select Monitor > Networks > Network Status.
The network status table shows the network name, the protocol, the interface over which the network runs (eth:1 for LAN, atm:1 or hdlc:1 for WAN), how the network was created (static for LAN, dynamic for WAN) and the network address assigned to the connection.
The screen capture below provides an example of the network status table.
The bridge forwarding table is used for forwarding packets and contains the list of learned media access control (MAC) addresses. To access this table, go to the OfficeConnect Remote 840 home page and select Monitor > Routes and Services > Bridge Forwarding Table.
The table contains the learned MAC addresses and counters for data traffic that has been received, forwarded or not forwarded (filtered), and transmitted.
Bridge counters provide transmit and receive counts for the bridge process. To view the counters table, from the OfficeConnect Remote 840 home page, select Monitor > Networks > Bridge. 
The Office Connect Remote 840 router maintains logs of certain events. These logs contains a running list of text messages generated during connection to the WAN or whenever a critical event happens.
The connection event log contains a text description of WAN interface events. This includes cell delineation detection as well as the progress of remote site connections. To access this log, from the OfficeConnect Remote 840 Manager home page, select Monitor > Events > Connection Events.
The following screen capture shows a successful connection to a remote site named red using PPP network service. 
Critical Events Log
The Critical Event Log contains a running list of text messages generated by the OfficeConnect Remote 840 when a critical event occurs. To access this log, from the OfficeConnect Remote 840 Manager home page, select Monitor > Events > Critical Event Log. Critical events are rare and may indicate an operational problem.
