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xStack DGS/DXS-3300 Series Layer 3 Stackable Gigabit Ethernet Switch CLI Manual
90
config multicast_fdb
Parameters
<vlan_name 32> − The name of the VLAN on which the MAC
address resides.
<macaddr> − The MAC address that will be added to the
multicast forwarding table.
[add | delete] − Add will add ports to the forwarding table. Delete
will remove ports from the multicast forwarding table.
<portlist> − Specifies a range of ports to be configured.
The port list is specified by listing the lowest switch number
and the beginning port number on that switch, separated by
a colon. Then the highest switch number, and the highest
port number of the range (also separated by a colon) are
specified. The beginning and end of the port list range are
separated by a dash. For example, 1:3 specifies switch
number 1, port 3. 2:4 specifies switch number 2, port 4. 1:3-
2:4 specifies all of the ports between switch 1, port 3 and
switch 2, port 4 − in numerical order.
Restrictions Only administrator-level users can issue this command.
Example usage:
To add multicast MAC forwarding:
DGS-3324SRi:4#config multicast_fdb default 01-00-00-00-00-01 add 1:1-1:5
Command: config multicast_fdb default 01-00-00-00-00-01 add 1:1-1:5
Success.
DGS-3324SRi:4#
config fdb aging_time
Purpose Used to set the aging time of the forwarding database.
Syntax
config fdb aging_time <sec 10-1000000>
Description The aging time affects the learning process of the Switch.
Dynamic forwarding table entries, which are made up of the
source MAC addresses and their associated port numbers, are
deleted from the table if they are not accessed within the aging
time. The aging time can be from 10 to 1000000 seconds with a
default value of 300 seconds. A very long aging time can result in
dynamic forwarding table entries that are out-of-date or no longer
exist. This may cause incorrect packet forwarding decisions by the
Switch. If the aging time is too short however, many entries may
be aged out too soon. This will result in a high percentage of
received packets whose source addresses cannot be found in the
forwarding table, in which case the Switch will broadcast the
packet to all ports, negating many of the benefits of having a
switch.
Parameters
<sec 10-1000000> − The aging time for the MAC address
forwarding database value. The value in seconds may be between
10 and 1000000 seconds. The default is 300 seconds.
Restrictions Only administrator-level users can issue this command.