The commands that you can use depend on the system that you have, your level of access, and the types of modules and other hardware options that are configured for your system. The following diagram shows the complete list of commands for all systems. See the checklist at the beginning of each command description in this chapter for whether your system supports the command.

bridge port summary

Displays a summary of bridge port information, including the STP configurations for the bridge port.

Valid Minimum Abbreviation

b po s

• The port numbering shown for your ports is always sequential, although it depends on the placement of the modules that you have configured into your system. See the Implementation Guide for your system for more information about port numbering.

• When displaying resilient links, the main and standby ports are shown in ascending order.

• When you are prompted to select ports, specify the ? option to see a list of information about your bridge ports. The ? option displays a Selection column, a Port column, and a Label column.

  • Without trunking, the Selection and Port columns contain the same port numbers, indicating that you can select each port.

  • With trunking, the Selection column indicates that you can select the anchor port (lowest-numbered port) in the trunk, and the Port column shows each port that is associated with the trunk. The Label column contains the trunk name, if you have assigned one.

Field	Description
fwdTransitions	Number of times that the port has entered the forwarding state. This value is useful for determining the stability of a bridged topology. The more transitions there are in and out of the forwarding state, the more unstable the topology is.
linkState	The state of the link (up or down)
portId	Identification (ID) of the port, which includes the port priority and the port number. Example: 0x8000
portNumber	The numerical number assigned to the port.
rxDiscards	Number of frames discarded during reception
rxFrames	Number of frames that were received by this port from its segment. A frame received on the interface that corresponds to this port is only counted by this object if the frame is for a protocol that is being processed by the local bridging function, including bridge management frames.
state	Spanning Tree state in which the port is currently operating: Blocking: The bridge continues to run the Spanning Tree algorithm on the port, but the bridge does not receive data packets from the port, learn locations of station addresses from it, or forward packets onto it. Listening: The bridge continues to run the Spanning Tree algorithm and to transmit configuration messages on the port, but it discards data packets that are received on the port and does not transmit data packets that are forwarded to the port. Learning: Similar to listening, but the bridge receives data packets on the port to learn the location of some of the stations that are located on the port. Forwarding: The bridge receives packets on the port and forwards or does not forward them, depending on address comparisons with the bridge's source address list. Disabled: The port has been disabled by management.
stp	Whether the Spanning Tree Protocol is enabled or disabled for the port
txFrames	Number of frames that were transmitted by this port to its segment. A frame transmitted on the interface that corresponds to this port is counted by this object only if the frame is for a protocol that is being processed by the local bridging function, including bridge management frames.

bridge port detail

Displays detailed information about bridge ports, including the STP configurations for the bridge port. It also includes the bridge port summary information.

Valid Minimum Abbreviation

b po d

• The port numbering shown for your ports is always sequential, although it depends on the placement of the modules that you have configured into your system. See the Implementation Guide for your system for more information about port numbering.

• When displaying resilient links, the main and standby ports are shown in ascending order.

• When you are prompted to select ports, specify the ? option to see a list of information about your bridge ports. The ? option displays a Selection column, a Port column, and a Label column.

  • Without trunking, the Selection and Port columns contain the same port numbers, indicating that you can select each port.

  • With trunking, the Selection column indicates that you can select the anchor port (lowest-numbered port) in the trunk, and the Port column shows each port that is associated with the trunk. The Label column contains the trunk name, if you have assigned one.

Field	Description
designatedBridge	Identification of the designated bridge of the LAN to which the port is attached. A Spanning Tree Protocol (STP) port parameter.
designatedCost	Cost through this port to get to the root bridge. The designated cost of the root port is the same as the cost that is received in incoming BPDUs from the designated bridge for that LAN.
designatedPort	Identification of the designated port on the designated bridge.
designatedRoot	Identification of the bridge that is designated as the root. It includes the root bridge's priority value and the MAC address of the lowest numbered port on that bridge. Example: 8000 00803e001520.
fwdTransitions	Number of times that the port has entered the forwarding state. This value is useful for determining the stability of a bridged topology. The more transitions there are in and out of the forwarding state, the more unstable the topology is.
gvrpState (3500)	The state (enabled or disabled) of GARP VLAN Registration Protocol.
linkState	State of the link (up or down)
pathCost	Cost to be added to the total path cost when this port is the root port.
portNumber	Without trunking, the bridge port that is associated with the statistics. With trunking, a list of the bridge ports that are associated with a given trunk. With trunking, you can have multiple ports associated with a trunk. Use ? to see the bridge port summary.
portId	Identification (ID) of the port, which includes the port priority and the port number. Example: 0x8000
priority	First factor that determines if a port is to be the designated port when more than one bridge port is attached to the same LAN. If all ports in a bridge have the same priority, then the port number is used as the determining factor.
rxAllFilters (3500 and 9000 Layer 3)	Number of frames that were discarded due to a user-defined packet filter on the receive all path of this bridge port.
rxBlockedDiscs (3500 and 9000 Layer 3)	Number of frames that were discarded by this port because the receiving bridge port was not in the forwarding state.
rxErrorDiscs	Number of frames that were discarded by this port because of internal bridge system errors (such as hardware and software address table discrepancies).
rxForwards (9000 Layer 3)	Number of frames that were received on this bridge port that were forwarded to another bridge port.
rxForwardMcasts (3900, 9300, 9400, and 9000 Layer 2)	Number of multicast frames received on this bridge port that were forwarded to another bridge port.
rxForwardUcasts (3900, 9300, 9400, and 9000 Layer 2)	Number of unicast frames received on this bridge port that were forwarded to another bridge port.
rxFloodUcasts	Number of unicast frames received on this port that were flooded to one or more ports.
rxFrames	Number of frames that were received by this port from its segment. A frame received on the interface that corresponds to this port is counted by this object only if the frame is for a protocol that the local bridging function is processing, including bridge management frames.
rxMcastExcDiscs	Number of multicast frames that were discarded when rxMcastLimit was exceeded.
rxMcastExceeds	Amount of time that rxMcastLimit has been exceeded.
rxMcastFilters (3500 and 9000 Layer 3)	Number of frames that were discarded due to a user-defined packet filter on the receive multicast path of this port.
rxMcastLimit	Configurable parameter that limits the rate of multicast frames that are forwarded on a bridge port.
rxMcastLimitType (3900, 9300, 9400, and 9000 Layer 2)	Configurable parameter that selects the multicast limit type (multicast or broadcast)
rxNoDestDiscs (3900, 9300, 9400, and 9000 Layer 2)	Number of frames that were discarded because of an unknown VLAN ID or because the port was in the non-forwarding Spanning Tree state.
rxOtherDiscs (9000 Layer 3)	Number of frames that were discarded by this port because they contained either invalid (group) source addresses or source addresses that belong to this bridge (indicates network loops).
rxOtherDiscards	Number of frames that were discarded by this port because they contained either invalid (group) source addresses or source addresses that belong to this bridge (indicates network loops).
rxSameSegDiscs	Number of frames that were discarded by this port because the destination address is known on the same network segment as the source address (so the frame does not need to be bridged).
rxSecurityDiscs	Number of frames that were discarded by this port because they contained source addresses that were statically configured on another bridge port. That is, a statically configured station, which is not allowed to move, appears to have moved.
state	Spanning Tree state in which the port is currently operating: Blocking: The bridge continues to run the Spanning Tree algorithm on the port, but the bridge does not receive data packets from the port, learn locations of station addresses from it, or forward packets onto it. Listening: The bridge continues to run the Spanning Tree algorithm and transmit configuration messages on the port, but it discards data packets that are received on the port and does not transmit data packets that are forwarded to the port. Learning: Similar to listening, but the bridge receives data packets on the port to learn the location of some of the stations that are located on the port. Forwarding: The bridge receives packets on the port and forwards or does not forward them, depending on address comparisons with the bridge's source address list. Disabled: The port has been disabled by management.
stp	Whether the Spanning Tree Protocol is enabled or disabled for the port
txAllFilters (3500 and 9000 Layer 3)	Number of frames that were discarded because of a user- defined packet filter on the transmit all path of this bridge port.
txBlockedDiscs	Number of frames that were discarded by this port because the transmitting bridge port was not in the forwarding state.
txFrames	Number of frames that were transmitted by this port to its segment. A frame transmitted on the interface that corresponds to this port is counted by this object only if the frame is for a protocol that the local bridging function is processing, including bridge management frames.
txMcastFilters (3500 and 9000 Layer 3)	Number of frames that were discarded because of a user- defined packet filter on the transmit multicast path of this port.
txMtuExcDiscs (3500 and 9000 Layer 3)	Number of frames that were discarded by this port because of an excessive size.

bridge port mulitcastLimit

Sets the multicast packet firewall threshold that limits the forwarding rate to a bridge port of multicast traffic that originates on the Ethernet segment that is connected to the port.

Valid Minimum Abbreviation

b po m

• If you have a trunk that includes multiple bridge ports, be sure to specify the trunk's anchor port (lowest-numbered port) when you specify the multicast limit for the entire trunk. The multicast limit that you specify applies to each link that is associated with the trunk.

• Specify the multicast limit in K frames/s (1000 frames per second).

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to set the multicastLimit	A bridge port number	-
Frame type (9000)	The frame type for which you set the multicastLimit	Broadcast only MCast only	Mcast only
Multicast threshold value	Configurable bridge port parameter that limits the forwarding rate of multicast traffic that originates on the Ethernet or FDDI segment that is connected to the port.	0 - 20000	0

bridge port stpState

Sets the Spanning Tree Protocol for one or more bridge ports on the system. This setting affects the operation of a port only if the Spanning Tree Protocol is enabled. You can also set the STP port parameters of path cost and priority.

Valid Minimum Abbreviation

b po stps

• When STP is disabled for a port but enabled for the entire bridge, the port does not forward frames or participate in the Spanning Tree algorithm. See the Implementation Guide for your system for more information to enable STP for the entire bridge.

• When STP is disabled for a port as well as disabled for the entire bridge, the port continues to forward frames.

• When STP is removed from the port but is enabled for the bridge, the port is invisible to STP but can forward frames. Removing the port from STP is useful if you have an edge switch device that is connected to end stations (PCs) that are frequently turned on and off.

Prompt	Description	Possible Values	[Default]
Ports	Ports for which you want to control the STP setting	A port number ? (to display a port summary)	-
stpState	Spanning Tree Protocol state for one or more ports on the system	enabled disabled removed	By default, the Spanning Tree state value on a port is the same as the Spanning Tree state value that is set for the bridge.

bridge port stpCost

Sets the path cost that the STP algorithm adds to the root cost field in a configuration message that is received on this port. The system uses this value to determine the path cost to the root through this port. You can set this value individually on each port.

Valid Minimum Abbreviation

b po stpc

• A larger path cost value makes the LAN that is reached through the port more likely to be low in the Spanning Tree topology. The lower the LAN is in the topology, the less through traffic it carries. For this reason, you may want to assign a large path cost to a LAN that has a lower bandwidth or to one on which you want to minimize traffic.

• If your configuration is successful, the previous menu appears. If the configuration is not successful, the system notifies you that your changes failed, and you can try to reenter your changes.

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to set the path cost	A valid bridge port number	-
stpCost	Configurable bridge port STP parameter that specifies the cost to be added to the total path cost when this port is the root port	1 - 65535	10

bridge port stpPriority

Sets the STP bridge port priority, which influences the choice of port when the bridge has two ports that are connected to the same LAN, creating a loop. The Spanning Tree Protocol uses the bridge port with the lowest port priority.

Valid Minimum Abbreviation

b po stpp

• Port priority is a 1-octet value.

• If your configuration is successful, the previous menu appears. If the configuration is not successful, the system notifies you that your changes failed, and you can try to reenter your changes.

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to set the STP port priority.	A valid bridge port number	-
stpPriority	Configurable bridge port STP parameter that determines if a port is to be the designated port when more than one bridge port is attached to the same LAN. If all ports in a bridge have the same priority, then the port number is used as the determining factor.	0 x 0 - 0 x ff	0 x 80

bridge port gvrpState

Sets whether the VLAN origin for a port-based VLAN is dynamic (with GVRP) or static (without GVRP). You enable GARP VLAN Registration Protocol (GVRP) as an entire bridge state (see Chapter 9) and then as an individual bridge port state to take advantage of dynamic IEEE 802.1Q VLAN configuration. GVRP can help you simplify the management of VLAN configurations in your larger networks.

Valid Minimum Abbreviation

b p gvrp

• GVRP requires end stations with dynamic access NICs and CoreBuilder or SuperStack^® II devices that enable GVRP.

• Based on updates from GVRP-enabled devices, GVRP allows the system to dynamically create a port-based VLAN (unspecified) with a specific VID and a specific port.

• On a port-by-port basis, GVRP allows the system to learn about GVRP updates to an existing port-based, protocol-based, or network-based VLAN with that VID and IEEE 802.1Q tagging.

• GVRP allows the system to send dynamic GVRP updates about your existing port-based, protocol-based, or network-based VLAN.

• GVRP updates are not sent to any blocked STP ports. GVRP operates only on ports that are in the forwarding state.

• If GVRP is enabled, a port that changes to the STP forwarding state automatically begins to participate in GVRP. A port that changes to an STP state other than forwarding no longer participates in GVRP.

• VLANs created dynamically with GVRP exist only as long as a GVRP-enabled device is sending updates - if the devices no longer send updates, or GVRP is disabled, or the system is rebooted, all dynamic VLANs are removed.

• GVRP manages the active topology, not nontopological data such as VLAN protocols. If a local bridge needs to classify and analyze packets by VLAN protocols, you must manually configure protocol-based VLANs and simply rely on GVRP for VLAN (VID) updates. But if the local bridge needs to know only how to reach a given VLAN, then GVRP provides all necessary information.

• GVRP operates only on ports that are in the STP forwarding state. If GVRP is enabled, a port that changes to the STP forwarding state automatically begins to participate in GVRP. A port that changes to an STP state other than forwarding no longer participates in GVRP.

• The VLAN topologies that GVRP learns are treated differently from VLANS that are statically configured. GVRP's dynamic updates are not saved in NVRAM, while static updates are saved in NVRAM. When GVRP is disabled, the system deletes all VLAN interfaces that were learned through GVRP and leaves unchanged all VLANs that were configured through the Administration Console or through the Web management software.

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to enable or disable the gvrpState	enable disable	disable

bridge port address list

Displays the MAC addresses that are currently associated with selected bridge ports. The display includes each address type (static or dynamic), assigned port, and age.

Valid Minimum Abbreviation

b p a l

• If you have multiple ports that are associated with a trunk, the display groups ports that are associated with a trunk on one line (for example, 3,4,6) and lists the addresses associated with the trunk.

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to display MAC addresses	Valid bridge port numbers ? (to display a port summary)	-

bridge port address add

Adds new MAC addresses to the selected bridge ports as statically configured addresses. A statically configured address is never aged and cannot be learned on a different Ethernet port.

Valid Minimum Abbreviation

b p a add

• If you have multiple ports that are associated with a trunk, the display groups ports that are associated with a trunk on one line (for example, 3,4,6) and lists the addresses associated with the trunk.

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to add MAC addresses	Valid bridge port numbers ? (to display a port summary)	-
MAC address	MAC address that you want to add to the selected port	A valid MAC address	-

bridge port address remove

Removes individual MAC addresses from selected bridge ports.

Valid Minimum Abbreviation

b p a r

Prompt	Description	Possible Values	[Default]
MAC address	MAC address that you want to remove	A valid MAC address	-

bridge port address find

Determines the MAC address for a bridge port that you specify.

Valid Minimum Abbreviation

b p a fi

Prompt	Description	Possible Values	[Default]
MAC address	MAC address that you want to find	A valid MAC address	-

bridge port address flushAll

Flushes all static and dynamic MAC addresses from the bridge ports that you select.

Valid Minimum Abbreviation

b p a flusha

• Static MAC addresses - Addresses that you specified using the add option

• Dynamic MAC addresses - Addresses that the bridge learned automatically

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to flush all addresses	Valid bridge port numbers ? (to display a port summary)	-

bridge port address flushDynamic

Flushes all dynamic MAC addresses from the bridge ports that you select.

Valid Minimum Abbreviation

b p a flushd

• Dynamic MAC addresses - Addresses that the bridge learned automatically

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to flush all addresses	Valid bridge port numbers ? (to display a port summary)	-

bridge port address freeze

Changes all dynamic (automatically learned) addresses into static addresses for the bridge ports that you select.

Valid Minimum Abbreviation

b p a fr

• Dynamic MAC addresses - Addresses that the bridge learned automatically

Prompt	Description	Possible Values	[Default]
Bridge ports	Bridge ports for which you want to flush all addresses	Valid bridge port numbers ? (to display a port summary)	-