3com 3800 ユーザーズマニュアル

C

HAPTER

 6: S

WITCH

 F

ORWARDING

 D

ATABASE

 (FDB)

■

portlist — displays the entries for one or more ports

■

permanent — displays all permanent entries

The following sample output shows the information displayed when 
you request output for all FDB entries:

show fdb

Hash  Num      Mac          Vlan       Flags  Ptag  Portlist

------------------------------------------------------------

0f00: 0 ff:ff:ff:ff:ff:ff  Default(0001)  sm  0fef   CPU

3289: 0 00:e0:2b:00:00:00  Default(0001)  sm  0ffb   CPU

373d: 0 01:80:c2:00:00:00         (0000)  sm  0ffb   CPU

72f3: 0 00:e0:2b:00:a4:00  Default(0001)  sm  0ff1   CPU

Total: 4 Static: 4 Perm: 0 Dyn: 0 Dropped: 0

FDB Aging time: 300

The show command displays summary information, including

■

MAC address

■

VLAN name and VLANid

■

Entry method (dynamic/static/permanent)

■

Port

You can remove one or more specific entries from the FDB, or you can 
clear the entire FDB of all entries by using the commands listed in 
Table 6-2.

Table 6-2   Removing FDB Entry Commands

delete fdbentry <mac_address> vlan <name>

Allows you to delete a permanent FDB entry.

clear fdb {all | <mac_address> | vlan <name> 
| <portlist>}

Allows you to clear dynamic FDB entries that match 
the filter. Use the keyword “all” to clear all 
dynamic entries.

SW3800.BK  Page 4  Tuesday, May 5, 1998  5:20 PM