You can use the System tab to specify, among other things, tracking information for a device and device descriptions. The following table describes the System tab fields.
Field Description sysDesc The assigned system name. sysUpTime The time since the system was last booted. sysContact The contact information (in this case, an e-mail address) for the system administrator. sysName The name of this device. sysLocation The physical location of this device. Authentication Traps Select enabled or disabled. When you select enabled, SNMP traps are sent to trap receivers for all SNMP access authentication.
The Chassis tab displays information about the operating status of the hardware and whether or not the default factory settings are being used. The following table describes the Chassis tab fields.
Field Description Type The switch type. Descr A description of the switch hardware, including number of ports and transmission speed. Ver The current hardware version of the device. MacAddr The MAC address of the device. LstChng The value of sysUpTime when it was detected that the component or subcomponent was added to the chassis. If this has not occurred since the cold or warm start of the agent, then the value is zero. AdminState The switch administration state. OperState The operational state of the switch. Location The physical location of the chassis (e.g., fourth floor wiring closet in building A). The value is a zero length string if no information is available.
This object is different from sysLocation in MIB-II. However, an agent may use this value for sysLocation if none is configured in the agent.
The SNMP Info tab displays the addresses that the agent software uses to identify the switch. The following table describes the SNMP Info tab fields.
Field Description LastUnauthenticatedIpAddress The last IP address that was not authenticated by the device. LastUnauthenticatedCommunityString The last community string that was not authenticated by the device. TrpRcvrMaxEnt The maximum number of trap receiver entries. TrpRcvrCurEnt The current number of trap receiver entries. TrpRcvrNext The next trap receiver entry to be created.
The Trap Receivers tab displays the devices that will receive SNMP traps from the switch.
When Device Manager opens a device, it automatically adds the device on which Device Manager is running to the top of the Trap Receivers list. The following table describes the Trap Receivers tab fields.
Field Description NetAddr The address (or DNS hostname) for the trap receiver. Community Community string used for trap messages to this trap receiver.
The Fan Detail tab displays information about installed fans.
The following table describes the Fan Detail Tab fields.
Field Description Type Identifying code for the fan. Descr The model number of the fan. LstChng Describes whether or not this component has had a configuration change since being installed. This field always reads "none." OperState The operational state of the fan. RelPos The installed position of the fan. Fan positions are numbered 1 and 2, starting at the top.
The Power Supply Detail tab displays information about installed power supplies.
The following table describes the Power Supply Detail Tab fields.
Field Description Type Identifying code for the power supply. Descr The model number of the power supply. LstChng Describes whether or not this component has had a configuration change since being installed. This field always reads "none." OperState The operational state of the power supply. RelPos The installed position of the power supply. Power supply bays are numbered 1 to 3, starting at the far left.
The Interface tab displays the basic configuration and status of the port.
The following table describes the Interface Tab fields.
Field Description Index A unique value assigned to each interface. Descr The type of switch and number of ports. Type The media type of this interface. Mtu The size of the largest packet, in octets, that can be sent or received on the interface. PhysAddress The MAC address assigned to a particular interface. AdminStatus The current administrative state of the interface, which can be up, down or testing. When a managed system is initialized, all interfaces start with AdminStatus in the down state. AdminStatus changes to the up state (or remains in the down state) as a result of either management action or the configuration information available to the managed system. OperStatus The current operational state of the interface, which can be up, down or testing. If AdminStatus is up, then OperStatus should be up if the interface is ready to transmit and receive network traffic. If AdminStatus is down, then OperStatus should be down. It should remain in the down state if and only if there is a fault that prevents it from going to the test state. The testing state indicates that no operational packets can be passed. LastChange The value of sysUpTime at the time the interface entered its current operational state. If the current state was entered prior to the last reinitialization of the local network management subsystem, the value is zero. Speed The current operating speed of the port. Port The name of the port being viewed.
The VLAN tab shows VLAN settings for the specified port.
The following table describes the VLAN Tab fields.
Field Description Type Indicates the type of VLAN port (Trunk or Access port). If the port is a trunk port, the port is probably a member of more than one VLAN. If the port is an access port, the port can only be a member of one VLAN if there is no membership conflict. VlanIds The VLAN IDs of which this port is a member. DiscardTagged Frames This field only applies to access ports. It acts as a flag used to determine how to process tagged frames received on this port. When the flag is set, the frames are discarded by the forwarding process. When the flag is reset, the frames are processed normally. DiscardUntaggedFrames This field only applies to trunk ports. It acts as a flag used to determine how to process untagged frames received on this port. When the flag is set, the frames are discarded by the forwarding process. When the flag is reset, the frames are assigned to the VLAN specified by rcVlanPortDefaultVlanId. DefaultVLANId The VLAN ID assigned to untagged frames received on a trunk port. Port Allows you to change the switch port being viewed.
The Spanning Tree Port tab displays the status and configuration of the port spanning tree parameters.
The following table describes the VLAN Tab fields.
Field Description Priority The value of the priority field that is contained in the first (in network byte order) octet of the (2-octet long) Port ID. The other octet of the Port ID is derived from the value of dot1dStpPort. State The port’s current state as defined by application of the Spanning Tree Protocol. This state controls the action a port takes when it receives a frame. If the bridge detects a port that is malfunctioning, it places that port into the broken state. For ports that are disabled (see EnableStp), this object has a value of disabled. PortEnable The enabled or disabled spanning tree status of the port that affects only the operation of the Spanning Tree Protocol on the port. Disabling STP at the spanning tree group takes precedence over what is configured here. PathCost The contribution of this port to the cost of paths toward the spanning tree root, which include this port. The IEEE 802.1D-1990 standard recommends that the default value of this parameter be in inverse proportion to the speed of the attached LAN. DesignatedRoot The unique Bridge Identifier of the bridge recorded as the Root in the Configuration BPDUs transmitted by the Designated Bridge for the segment to which the port is attached. DesignatedCost The path cost of the Designated Port of the segment connected to this port. This value is compared to the Root Path Cost field in received bridge PDUs. DesignatedBridge The Bridge Identifier of the bridge that this port considers to be the Designated Bridge for this port’s segment. DesignatedPort The Port Identifier of the port on the Designated Bridge for this port’s segment. ForwardTransitions The number of times this port has transitioned from the Learning state to the Forwarding state. Port Allows you to change the switch port you are viewing.
The IP Address tab displays the switch IP address information.
The following table describes the IP Address Tab fields.
Field Description Addr The IP address to which this entry's addressing information pertains. NetMask The subnet mask associated with the IP address of this entry. The value of the mask is an IP address with all the network bits set to 1 and all the hosts bits set to 0. BcastAddr The IP broadcast address format used on this interface. ReasmMaxSize The size of the largest IP datagram which this entity can reassemble from incoming IP fragmented datagrams received on this interface.
A VLAN is a collection of ports on one or more switches that define a broadcast domain.
The following table describes the VLAN items.
Item Description Unlabeled far left column) The VLAN ID for the VLAN. Name The VLAN name. Type The type of VLAN: byPort or byProtocolId. PortMembers The slot/ports that are possible members of the VLAN.
The Spanning Tree Status tab contains information about the Spanning Tree Protocol configuration for the switch.
The following table describes the Spanning Tree Status fields.
Field Description BridgeAddress The MAC address used by this bridge when it must be referred to in a unique fashion. Nortel Networks recommends that this be the numerically smallest MAC address of all ports that belong to this bridge. However it is only required to be unique. When concatenated with rcStgPriority, a unique BridgeIdentifier is formed which is used by the Spanning Tree Protocol. NumPorts The number of ports controlled by this bridging entity. ProtocolSpecification An indication of what version of the Spanning Tree Protocol is being run. The value 'decLb100(2)' indicates the DEC LANbridge 100 Spanning Tree protocol. An IEEE 802.1d implementations returns 'ieee8021d(3)'. If future versions of the IEEE Spanning Tree Protocol are released that are incompatible with the current version, a new value will be defined. TimeSinceTopologyChange The time (in hundredths of a second) since the last time a topology change was detected by the bridge entity. TopChanges The total number of topology changes detected by this bridge since the management entity was last reset or initialized. DesignatedRoot The bridge identifier of the root of the spanning tree as determined by the Spanning Tree Protocol executed by this node. This value is used as the Root Identifier parameter in all Configuration Bridge PDUs originated by this node. RootCost The cost of the path to the root as seen from this bridge. RootPort The port number of the port which offers the lowest cost path from this bridge to the root bridge. MaxAge The maximum age of Spanning Tree Protocol information learned from the network on any port before it is discarded, in units of hundredths of a second. This is the actual value that this bridge is currently using. HelloTime The amount of time between the transmission of Configuration bridge PDUs by this node on any port when it is the root of the spanning tree or trying to become so, in units of hundredths of a second. This is the actual value that this bridge is currently using. HoldTime This time value determines the interval length during which no more than two Configuration bridge PDUs are transmitted by this node, in units of hundredths of a second. ForwardDelay This time value, measured in units of hundredths of a second, controls how fast a port changes its spanning state when moving towards the Forwarding state. The value determines how long the port stays in each of the Listening and Learning states, which precede the Forwarding state. This value is also used when a topology change has been detected and is under way, to age all dynamic entries in the Forwarding Database. (Note that this value is the one that this bridge is currently using, in contrast to rcStgBridgeForwardDelay which is the value that this bridge and all others would start using or when this bridge was to become the root.)
Bridging occurs in layer 2 of the OSI model where only the MAC address in the packet header is considered when forwarding. The following table describes the Bridge Info tab fields.
Field Description BridgeAddress The IP address of the bridge. NumPorts The number of ports that are bridged. Type Type of bridging that is set. For a BayStack switch, only transparent bridging is available.
The Bridge Port tab contains information about ports that are assigned to the bridge. The following table describes the Bridge Port tab fields.
Field Description Port Port number on the switch. DelayExceededDiscards The number of frames discarded by this port due to excessive transmit delay through the bridge. MtuExceededDiscards The number of frames discarded by this port due to an excessive size.
The Spanning Tree tab contains information about the status of the Spanning Tree Protocol for the switch.
The following table describes the Spanning Tree tab fields.
Field Description ProtocolSpecification An indication of what version of the Spanning Tree Protocol is being run. The value 'decLb100(2)' indicates the DEC LANbridge 100 Spanning Tree protocol. An IEEE 802.1d implementations returns 'ieee8021d(3)'. If future versions of the IEEE Spanning Tree Protocol are released that are incompatible with the current version, a new value will be defined. Priority Sets the STP bridge priority, in decimal. The range is 0 (highest priority) to 65535 (lowest priority). The default is 32768. TimeSinceTopologyChange The time (in hundredths of a second) since the last time a topology change was declared by the bridge entity or STG. TopChanges The total number of topology changes detected by this bridge since the management entity was last reset or initialized. DesignatedRoot The bridge identifier of the root of the spanning tree as determined by the Spanning Tree Protocol executed by this node. This value is used as the Root Identifier parameter in all Configuration Bridge PDUs originated by this node. RootCost The cost of the path to the root as seen from this bridge. RootPort The port number of the port that offers the lowest cost path from this bridge to the root bridge. MaxAge The maximum age of Spanning Tree Protocol information learned from the network on any port before it is discarded, in units of hundredths of a second. This is the actual value that this bridge is currently using. HelloTime The amount of time between the transmission of Configuration bridge PDUs by this node on any port when it is the root of the spanning tree or trying to become so, in units of hundredths of a second. This is the actual value that this bridge is currently using. ForwardDelay This time value, measured in units of hundredths of a second, controls how fast a port changes its spanning state when moving towards the Forwarding state. The value determines how long the port stays in each of the Listening and Learning states, which precede the Forwarding state. This value is also used when a topology change has been detected and is under way, to age all dynamic entries in the Forwarding Database. (Note that this value is the one that this bridge is currently using, in contrast to rcStgBridgeForwardDelay which is the value that this bridge and all others would start using or when this bridge was to become the root.) BridgeMaxAge The value in hundredths of a second that all bridges use for MaxAge when this bridge is acting as the root. Note: The IEEE 802.1D-1990 standard specifies that the range for this parameter is related to the value of dot1dStpBridgeHelloTime. The default is 2000 (20 seconds). BridgeHelloTime The value, in hundredths of a second, that all bridges use for Hello Time when this bridge is acting as the root. The granularity of this timer, as specified by the IEEE 802.1D-1990 standard, is increments of 1/100 of a second. The default is 200 (2 seconds). BridgeForwardDelay The value, in hundredths of a second, that all bridges use for ForwardDelay when this bridge is acting as the root. The default is 1500 (15 seconds).
The Transparent tab shows transparent bridging information for the switch. The following table describes the Transparent tab fields.
Field Description LearnedEntryDiscards The total number of Forwarding Database entries that have been or would have been learned but have been discarded due to a lack of space in the Forwarding Database. If this counter is increasing, it indicates that the Forwarding Database is regularlty becoming full (a condition which has unpleasent performance effects on the subnetwork). If this counter has a significant value but is not presently increasing, it indicates that the problem has been occurring but is not persistent. Aging Time The timeout period in seconds for aging out dynamically learned forwarding information. The IEEE 802.1D-1990 standard recommends a default of 300 seconds. The actual aging time can be up to two times the AgingTime value.
The Forwarding tab displays databse information for the VLAN and contains information about unicast entries for which the bridge has forwarding information. The transparent bridging function uses this information to determine how to forward a received frame.
The following table describes the Forwarding tab fields.
Field Description Status Values include:
self - One of the bridge's addresses.
learned - A learned entry that is being used.
mgmt - A static entry.
Address A MAC address learned by the switch. Port Either a value of zero (0) or the port on which a frame having the specified MAC address has been seen. A value of 0 indicates a self-assigned MAC address.
The following table describes the Transparent Bridging Tab fields.
Field Description PortInFrames The number of frames that have been received by this port from its segment. PortOutFrames The number of frames that have been transmitted by this port to its segment. PortDiscards Count of valid frames received which were discarded (filtered) by the Forwarding Process.
The following table describes the MDA Card Tab fields.
Field Description Type: The type of component/subcomponent. The values are defined under s5ChasComTypeVal in the Registration MIB. Descr: A description of the component/subcomponent. If not available, the value is a zero length string. Ver: The version number of the component/subcomponent. If not available, the value is a zero length string. MacAddr: The MAC address of the device.