You can display and change the bridging functions of the Switch, such as STP, multicast filtering, and also VLANs using the commands in the Bridge menu. These commands allow you to:

• Specify the aging time of the bridge address on the current Switch.

• Enable and disable IGMP multicast snooping for all units in the stack and auto-discovery of router ports.

• Display and configure MAC addresses on a per port basis.

• Set up and administer the bridge Spanning Tree Protocol functions of the Switch unit.

• Configure and display the VLAN functions of the Switch unit.

You can set the bridge aging time on the Switch using the agingTime command on the Bridge menu.

To set the address aging time:

1 .   At the Top-level menu, enter:

bridge agingTime

The following prompt is displayed:

Enter new value in seconds (60-1000000, off) [1800]:

2 .   Enter the new value for the aging timeout period. If you select off, aging will be turned off.

Displaying Bridge Information

You can display bridge information on the current Switch unit using the display command on the bridge menu.

To display the statistical information:

1 .   At the Top-level menu, enter:

bridge display

2 .   The bridge information for the Switch is displayed as shown in the following example.

stpState:		disabled	agingTime:	1800
Time since topology change:			0 hrs 0 mins 0 seconds
Topology Changes:			0
Bridge Identifier:			8000 08004e56d778
Designated Root:			0001 000000020000
maxAge:		0	bridgeMaxAge:	20
helloTime:		1	bridgeHelloTime:	2
forwardDelay:		105	bridgeFwdDelay:	15
holdTime:		1	rootCost:	131072
rootPort:		No Port	priority:	0x8000
Select menu option:

The following bridge information is displayed:

• StpState - Displays the configurable parameter that provides the state of the bridge (that is, whether Spanning Tree is enabled or disabled).

• Time Since Last Topology Change - Displays the time elapsed (in hours, minutes, and seconds) since STP last reconfigured the network topology.

• Topology Changes - Displays the number of times that STP has reconfigured the network topology.

• Bridge Identifier - Displays the bridge identification. It includes the bridge priority value and the MAC address of the lowest numbered port.

• agingTime - Displays the time-out period in seconds for aging out dynamically learned forwarding information.

• Designated Root - Displays the root bridge identification. It includes the root bridge's priority value and the MAC address of the lowest numbered port on that bridge.

• bridgeMaxAge - Displays the maximum age value, used when this bridge is the root bridge. This value determines when the stored configuration message information is too old and is discarded.

• maxAge - Displays the maximum age in seconds at which the stored configuration message information is judged to be too old and is discarded. This value is determined by the root bridge.

• bridgeHelloTime - Displays the Hello time value, used when this bridge is the root bridge. This value is the time that elapses between the configuration messages generated by a bridge that assumes itself to be the root.

• helloTime - Displays the time that elapses between the configuration messages generated by a bridge that assumes itself to be the root.

• bridgeFwdDelay - Displays the forward delay value used when this bridge is the root bridge. This value sets the amount of time that a bridge spends in the listening and learning states.

• forwardDelay - Displays the time that a bridge spends in the "listening" and "learning" states.

• holdTime - Displays the minimum delay time in seconds between sending topology change Bridge Notification Protocol Data Units (BPDUs).

• rootCost - Displays the cost of the best path to the root from the root port of the bridge. For example, one determining factor of cost is the speed of the network interface, that is, the faster the speed, the smaller the cost.

• rootPort - Displays the port with the best path from the bridge to the root bridge. Will display a port number, or No Port.

• priority - Displays the configurable value that is appended as the most significant portion of a bridge identifier.

You can enable or disable IGMP Snooping for all Switch units in the stack using the IGMP command on the Multicast Filtering menu.

To enable or disable IGMP Snooping:

1 .   At the Top-level menu, enter:

bridge multicastFiltering igmp

The following prompt is displayed:

Enter new value (disable, enable) [disable]:

2 .   Enter enable or disable.

Enabling and Disabling Router Port Auto-Discovery

You can enable or disable router port auto-discovery for all Switch units in the stack using the autoDiscovery command on the Router Port menu.

The default setting for the Switch is router port auto-discovery enabled, with no manually identified router ports. You can manually identify router ports with auto-discovery enabled.

To enable or disable router port auto-discovery:

1 .   At the Top-level menu, enter:

bridge multicastFiltering routerPort autoDiscovery

The following prompt is displayed:

Enter new value (enable, disable) [enable]:

2 .   Enter enable or disable.

Manually Identifying a Router Port

You can manually identify router ports for all Switch units in the stack using the addPort command on the Router Port menu.

To manually define a router port:

1 .   At the Top-level menu, enter:

bridge multicastFiltering routerPort addPort

The following prompt is displayed:

Select unit for router port (1-4) [1]:

2 .   Enter the number of unit for the router port.

The following prompt is displayed:

Select router port (1-12):

3 .   Enter the number of the router port.

Displaying all Router Ports

You can display a list of router ports for all Switch units in the stack using the list command on the Router Port menu.

This list displays all router ports whether manually configured, or automatically learned via auto-discovery.

To display all router ports:

1 .   At the Top-level menu, enter:

bridge multicastFiltering routerPort list

2 .   The router port information for all Switch units in the stack is displayed in ascending unit and port number order.

An example of the router port information is shown below:

Unit	Port	Learning State
1	3	Auto
1	4	Manual
2	26	Manual
4	6	Auto

You can remove a router port from any Switch unit in the stack using the removePort command on the Router Port menu. This command can remove router ports whether manually configured, or automatically learned by IGMP Snooping.

To remove a router port:

1 .   At the Top-level menu, enter:

bridge multicastFiltering routerPort removePort

The following prompt is displayed:

Select unit for router port (1,2,4):

The list in the prompt only includes the units in the stack that have router ports on them.

2 .   Enter the number of unit for the router port that you wish to remove.

The following prompt is displayed:

Select router port (3,4,all):

The list in the prompt only includes the router ports on the selected unit.

3 .   Enter the number of the router port that you wish to remove.

Adding a Statically Configured Address to a Switch Database

You can add a statically configured address to a switch database using the add command on the Address menu.

To add an address to a port:

1 .   At the Top-level menu, enter:

bridge port address add

The following prompt is displayed:

Select bridge port(1-12):

2 .   Enter the number of the port that you wish to add an address to.

The following prompt is displayed:

Enter the address to be added:

3 .   Enter the address, which must be entered in the form of hyphen separated bytes, for example: 08-00-02-06-03-bd.

The following prompt is displayed:

Enter the VLAN ID for this address (1-4094) [1]:

4 .   Enter the VLAN ID for the newly assigned address.

Finding a MAC Address

You can find a MAC address within the address databases on all Switch units within the stack using the find command on the Address menu.

To find a port MAC address:

1 .   At the Top-level menu, enter:

bridge port address find

The following prompt is displayed:

Enter the address:

2 .   Enter the address that you wish to find. The address must be entered in the form of hyphen separated bytes, for example: 08-00-02-06-03-bd.

The command produces a display that shows all occurrences of the address within the stack forwarding database and indicates the unit and port number associated with it.

Displaying MAC Addresses for a Port

You can display a list of MAC addresses associated with a selected port using the list command on the Address menu.

To display a list of MAC addresses:

1 .   At the Top-level menu, enter:

bridge port address list

The following prompt is displayed:

Select bridge ports (1-12, all):

2 .   Enter the number of the port that you wish to have its associated MAC addresses displayed, or enter all for all the ports.

The command produces a list of all MAC addresses associated with the specified port(s).

Removing MAC Addresses from a Port

You can remove a MAC address associated with a selected port using the remove command on the Address menu.

To remove a MAC address:

1 .   At the Top-level menu, enter:

bridge port address remove

The following prompt is displayed:

Enter the address to be removed:

2 .   Enter the address that you wish to remove. The address must be entered in the form of hyphen separated bytes, for example: 08-00-02-06-03-bd.

The following prompt is displayed:

Enter the VLAN ID for this address (1-4094) [1]:

3 .   Enter the VLAN ID for the address that you wish to remove.

Displaying Port Information

You can display information about a port on the current Switch unit using the detail command on the Port menu.

To display the port information:

1 .   At the Top-level menu, enter:

bridge port detail

The following prompt is displayed:

Select bridge port (1-12):

2 .   Enter the number of a port on the Switch unit. If the port selected is working in VLT mode the display will show the port as being a member of all current VLANs with Tagging shown as vlt.

The port information for the Switch is displayed as shown in the example below.

Unit 2, Port 1 Detailed Information
State:		Disabled	fwdTransitions:		0
StpCost:		19	BroadcastStormControl:		Enabled
VLAN Membership
VLAN ID	Local ID		Vlan Name	Tagging
-----------------------------------------------------------
1	1		Default VLAN	None
Select menu option:

You can set the spanning tree path cost on a port of the current Switch using the stpCost command on the Port menu.

To set the spanning tree path cost:

1 .   At the Top-level menu, enter:

bridge port stpCost

The following prompt is displayed:

Select bridge port (1-12):

2 .   Enter the number of the port.

The following prompt is displayed:

Enter new value (1-65535) [10]:

3 .   Enter the new value for the spanning tree path cost on the port.

Enabling and Disabling Spanning Tree Fast Start

You can enable or disable spanning tree fast start on a port of the current Switch unit using the stpFastStart command on the Port menu.

To enable or disable spanning tree fast start:

1 .   At the Top-level menu, enter:

bridge port stpFastStart

The following prompt is displayed:

Select bridge ports (1-12) [1]:

2 .   Enter the number of the port to be enabled or disabled.

The following prompt is displayed:

Enter new value (disable, enable) [disable]:

3 .   Enter enable or disable.

Displaying Port Summary Information

You can display summary information about a port, or all ports, of the current Switch unit using the summary command on the Port menu.

To display the port summary information:

1 .   At the Top-level menu, enter:

bridge port summary

The following prompt is displayed:

Select bridge port (1-12, all) [all]:

2 .   Enter the number of a port on the Switch unit, or all.

The port summary information for the Switch is displayed as shown in the example below.

Port	stpState	fwdTransitions	stpCost
-------------------------------------------------------
1	Disabled	0	19
2	Disabled	0	19
3	Disabled	0	19
4	Disabled	0	19
5	Disabled	0	19
6	Disabled	0	19
7	Disabled	0	19
8	Disabled	0	19
9	Disabled	0	19
10	Disabled	0	19
11	Disabled	0	19
12	Disabled	0	19
13	Disabled	0	19
Select menu option:

The following port summary information is displayed:

• State - Displays the parameters that provide the state of the port, the possible values are:

  • Disabled - port is disabled

  • Link Down - port is enabled but link is down

  • Blocking - equivalent to STP blocking state

  • Listening - equivalent to STP listening state

  • Learning - equivalent to STP learning state

  • Forwarding - equivalent to STP forwarding state

  • Broken - port is broken

• fwdTransitions - Displays the number of times this port has entered the forwarding state from the learning state.

• stpCost - Displays the current path cost associated with the port.

You can enable or disable VLT tagging on a port of the current Switch unit using the vltMode command on the Port menu.

To enable or disable VLT tagging on a port:

1 .   At the Top-level menu, enter:

bridge port vltMode

The following prompt is displayed:

Select bridge ports (1-12) [1]:

2 .   Enter the number of the port to have VLT tagging enabled or disabled.

The following prompt is displayed:

Enter new value (disable, enable) [disable]:

3 .   Enter enable or disable.

Setting the Bridge Spanning Tree Forward Delay

You can set the bridge forward delay spanning tree parameter of the current Switch using the stpForwardDelay command on the Bridge menu.

To set the bridge spanning tree forward delay:

1 .   At the Top-level menu, enter:

bridge stpForwardDelay

The following prompt is displayed:

Enter new value in seconds (4-30) [15]:

2 .   Enter the new value for the forward delay.

Setting the Bridge Spanning Tree Hello Timer

You can set the bridge hello timer spanning tree parameter of the current Switch using the stpHelloTime command on the Bridge menu.

To set the bridge spanning tree hello timer:

1 .   At the Top-level menu, enter:

bridge stpHelloTime

The following prompt is displayed:

Enter new value in seconds (1-10) [2]:

2 .   Enter the new value for the hello timer.

Setting the Bridge Spanning Tree Maximum Age

You can set the bridge maximum age spanning tree parameter of the current Switch using the stpMaxAge command on the Bridge menu.

To set the bridge spanning tree maximum age:

1 .   At the Top-level menu, enter:

bridge stpMaxAge

The following prompt is displayed:

Enter new value in seconds (6-40) [20]:

2 .   Enter the new value for the maximum age.

Setting the Spanning Tree Bridge Priority

You can set the spanning tree bridge priority of the current Switch using the stpPriority command on the Bridge menu.

To set the spanning tree bridge priority:

1 .   At the Top-level menu, enter:

bridge stpPriority

The following prompt is displayed:

Enter new hexadecimal value (0x0-0xffff) [0x8000]:

2 .   Enter the new hexadecimal value for the bridge priority. (The default option indicates the current value of the stpPriority MIB item.)

Enabling and Disabling Spanning Tree on a Bridge

You can enable or disable spanning tree on a bridge of the current Switch unit using the stpState command on the Bridge menu.

To enable or disable spanning tree on a bridge:

1 .   At the Top-level menu, enter:

bridge stpState

The following prompt is displayed:

Enter new value (disable, enable) [disable]:

2 .   Enter enable or disable.

Adding a Port to a VLAN

You can add a single port to a VLAN, or add all ports on the current Switch unit to the selected VLAN using the addPort command on the VLAN menu.

To add a port to a VLAN:

1 .   At the Top-level menu, enter:

bridge vlan addPort

The following prompt is displayed:

Select VLAN ID (1-4094) [1]:

2 .   Enter the number of the VLAN ID that you wish to add a port to.

The following prompt is displayed:

Enter port (1-12, all):

3 .   Enter the port number to be added to the VLAN, or enter all for all ports on the current Switch unit to be added.

The following prompt is displayed:

Enter tag type (none, 802.1Q):

4 .   Enter the tagging information for the port added to the VLAN.

Creating a VLAN

You can create a VLAN using the create command on the VLAN menu.

To create a VLAN:

1 .   At the Top-level menu, enter:

bridge vlan create

The following prompt is displayed:

Enter VLAN ID (2-4094) [3]:

2 .   Enter the number of the VLAN ID that you wish to create. The default option is the lowest value within the VLAN ID range not currently used in the stack.

The following prompt is displayed:

Enter Local ID (1-16) [3]:

3 .   Enter the local ID to be associated with the VLAN. The default option is the lowest value within the Local ID range not currently used in the stack.

The following prompt is displayed:

Enter VLAN Name [VLAN 3]:

4 .   Enter the name for the VLAN. The VLAN name can be a maximum of 32 characters, including spaces. The default VLAN name is VLAN x, where x is the VLAN ID.

Deleting a VLAN

You can delete a VLAN using the delete command on the VLAN menu.

To delete a VLAN:

1 .   At the Top-level menu, enter:

bridge vlan delete

The following prompt is displayed:

Select VLAN ID (2-4094):

2 .   Enter the VLAN ID that you wish to delete. If the VLAN contains member ports, a warning message is displayed that asks you to confirm deletion of the VLAN.

Displaying Detailed VLAN Information

You can display detailed information about a VLAN, specifically port membership and statistics, for each Switch unit in the stack that is a member of the specified VLAN using the detail command on the VLAN menu.

To display detailed VLAN information:

1 .   At the Top-level menu, enter:

bridge vlan detail

The following prompt is displayed:

Select VLAN ID (1-4094) [1]:

2 .   Enter the VLAN ID that you wish to display.

The detailed VLAN information for the selected VLAN ID is displayed as shown in the example below.

VLAN ID: 1	Local ID: 1		Name: Default VLAN
Unit	Ports
1	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13
2	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
Unicast Frames:		18564	Octets:		4989235
Multicast Frames:		28157	Broadcast Frames:		0
Select menu option:

Immediately after creating a VLAN, the VLAN based counters will only count for ports local to the unit where the VLAN was created. In order for ports in other units to contribute to the VLAN counters, a reset of the stack is required.

Modifying a VLAN

You can modify the VLAN name for a specified VLAN ID using the modify command on the VLAN menu.

To modify a VLAN name:

1 .   At the Top-level menu, enter:

bridge vlan modify

The following prompt is displayed:

Select VLAN ID (1-4094) [1]:

2 .   Enter the VLAN ID that you wish to modify.

The following prompt is displayed:

Enter VLAN Name [VLAN 3]:

3 .   Enter the new VLAN name. The default option is the current VLAN name for the specified VLAN ID.

Removing a Port from a VLAN

You can remove a single port from a VLAN, or remove all ports on the current Switch unit from the selected VLAN using the removePort command on the VLAN menu.

To remove a port from a VLAN:

1 .   At the Top-level menu, enter:

bridge vlan removePort

The following prompt is displayed:

Select VLAN ID (1-4094) [1]:

2 .   Enter the number of the VLAN ID that you wish to remove a port from.

The following prompt is displayed:

Select port (1,5,7,all):

3 .   Enter the port number to be removed from the VLAN, or enter all for all ports on the current Switch unit to be removed. The choice of port numbers reflects the number of ports on the current Switch unit. An error message is displayed if there are no ports within the selected VLAN.

Displaying Summary VLAN Information

You can display summary information about a single VLAN or all VLANs present in the stack, specifically port membership, using the summary command on the VLAN menu.

To display summary VLAN information:

1 .   At the Top-level menu, enter:

bridge vlan summary

The following prompt is displayed:

Select VLAN ID (1-4094, all) [1]:

2 .   Enter the VLAN ID that you wish to display, or enter all to display all VLANs in the current stack.

The summary VLAN information for the selected VLAN ID is displayed as shown in the example below.

VLAN ID	Local ID	Name
1	1	Default VLAN
Select menu option: