DES-3526 Layer 2 Fast Ethernet Switch
config multicast_fdb
forwarding table.
[add | delete]
−
add
will add ports to the forwarding table.
delete
will
remove ports from the multicast forwarding table.
<portlist>
−
Specifies a port or range of ports to be configured.
Restrictions Only
administrator-level users can issue this command.
Example usage:
To add multicast MAC forwarding:
DES-3526:4#config multicast_fdb default 01-00-00-00-00-01 add 1-5
Command: config multicast_fdb default 01-00-00-00-00-01 add 1-1-5
Success.
DES-3526:4#
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table entries that are out-of-date or no longer exist.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.
Restrictions Only
administrator-level users can issue this command.
Example usage:
To set the fdb aging time:
88
