84VLAN Commands

clear fdb

Deletes an entry from the forwarding database (FDB).

Syntax clear fdb {perm static dynamic port port-list} [vlan vlan-id] [tag tag-value]

perm

 

Clears permanent entries. A permanent entry does not age out and

 

 

remains in the database even after a reboot, reset, or power cycle. You

 

 

must specify a VLAN name or number with this option.

static

 

Clears static entries. A static entry does not age out, but is removed from

 

 

the database after a reboot, reset, or power cycle. You must specify a

 

 

VLAN name or number with this option.

dynamic

 

Clears dynamic entries. A dynamic entry is automatically removed

 

 

through aging or after a reboot, reset, or power cycle. You are not required

 

 

to specify a VLAN name or number with this option.

port port-list

Clears dynamic entries that match destination ports in the port list. You

 

 

are not required to specify a VLAN name or number with this option.

vlan vlan-id

VLAN name or number—required for removing permanent and static

 

 

entries. For dynamic entries, specifying a VLAN removes entries that

 

 

match only that VLAN. Otherwise, dynamic entries that match all

 

 

VLANs are removed.

tag tag-value

VLAN tag value that identifies a virtual port. If you do not specify a tag

 

 

value, WSS Software deletes only entries that match untagged interfaces.

 

 

Specifying a tag value deletes entries that match only the specified tagged

 

 

interface.

Defaults

None.

 

Access

Enabled.

 

Usage You can delete forwarding database entries based on entry type, port, or VLAN. A VLAN name or number is required for deleting permanent or static entries.

Examples The following command clears all static forwarding database entries that match VLAN blue:

WSS# clear fdb static vlan blue

success: change accepted.

The following command clears all dynamic forwarding database entries that match all VLANs:

WSS# clear fdb dynamic

success: change accepted.

The following command clears all dynamic forwarding database entries that match ports 3 and 5:

WSS# clear fdb port 3,5

success: change accepted.

See Also

set fdb on page 77

show fdb on page 81

NN47250-100 (Version 02.51)

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Nortel Networks 2300 Series Clear fdb, WSS# clear fdb static vlan blue, WSS# clear fdb dynamic, WSS# clear fdb port 3,5