6-2
S
UMMIT
S
WITCH
I
NSTALLATION
AND
U
SER
G
UIDE
S
WITCH
F
ORWARDING
D
ATABASE
(FDB)
Switch is reset or a power off/on cycle occurs. For more information about setting
the aging time, refer to the section
ÒConÞguring FDB Entries
,Ó later in this chapter.
¥ Static entries
Ñ If the aging time is set to zero, all aging entries in the database are
deÞned as static, non-aging entries. This means that they do not age, but they are
still deleted if the Switch is reset.
¥ Permanent entries
Ñ Permanent entries are retained in the database if the Switch is
reset or a power off/on cycle occurs. The system administrator must make entries
permanent. A permanent entry can either be a unicast or multicast MAC address. All
entries entered by way of the command-line interface are stored as permanent. The
Switch can support a maximum of 64 permanent entries.
H
OW
FDB E
NTRIES
G
ET
A
DDED
Entries are added into the FDB in two ways:
¥
The Switch can learn entries. The Switch updates its FDB with the source MAC
address from a packet, the VLAN, and the port identiÞer on which the source packet
is received.
¥
You can enter and update entries using a MIB browser, an SNMP Network Manager,
or the command-line interface, as described in the next section.
C
ONFIGURING
FDB E
NTRIES
To conÞgure entries in the FDB, use the commands listed in
Table 6-1
.
Table 6-1: FDB Configuration Commands
Command
Description
create fdbentry <macaddress> vlan
<name> <portlist> {qosprofile <qosname>}
Creates a permanent FDB entry. Specify the
following:
■
macaddress
— Device MAC address, using
colon separated bytes.
■
name
— VLAN associated with MAC address.
■
portlist
— Port numbers associated with
MAC address.
■
qosname
— QoS profile associated with MAC
address.
If more than one port number is associated with a
permanent MAC entry, packets are multicast to the
multiple destinations.
SUMMIT.BK Page 2 Thursday, September 25, 1997 12:33 PM
