D-Link DES-3828 Product Manual - Page 88

xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual DES-3800:admin#config multicast_fdb default 01-00-00-0000-01 add 1-5 Command: config multicast_fdb default 01-00-00-00-00-01 add 1-5 Success. DES-3800:admin# NOTE: When IGMP Snooping is enabled, the Static Multicast Forwarding settings will not take effect. config fdb aging_time Purpose Syntax Description Parameters Restrictions Used to set the aging time of the forwarding database. config fdb aging_time 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 A very long aging time can result in dynamic forwarding table entries that are out-of-date or no longer exist.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. − The aging time for the MAC address forwarding database value. The value in seconds may be between 10 and 1000000 seconds. Only Administrator or Operator-level users can issue this command. Example usage: To set the FDB aging time: DES-3800:admin#config fdb aging_time 300 Command: config fdb aging_time 300 Success. DES-3800:admin# 84