3Com 9100 User Manual

Contents

Configuring FDB Entries 83Configuring FDBEntriesTo configure entries in the FDB, use the commands listed in Table 21.FDB ConfigurationExamplesThe following example adds a permanent entry to the FDB:create fdbentry 00:D0:96:BF:31:50 vlan marketing port 4The permanent entry has the following characteristics:n MAC address is 00D096BF3150.n VLAN name is marketing.Table 21 FDB Configuration CommandsCommand Descriptioncreate fdbentry vlan [blackhole | | dynamic]{qosprofile }Creates an FDB entry. Specify the following:n mac_address — Device MAC address, usingcolon separated bytes.n name — VLAN associated with MAC address.n blackhole — Configures the MAC address as ablackhole entry.n portlist — Port numbers associated with MACaddress.n dynamic — Specifies that the entry will be learneddynamically. Used to associated a QoS profile witha dynamically learned entry.n qosname — QoS profile associated with MACaddress.If more than one port number is associated with apermanent MAC entry, packets are multicast to themultiple destinations.config fdb agingtime Configures the FDB aging time. The range is 15through 1,000,000 seconds. The default value is 300seconds. A value of 0 indicates that the entry shouldnever be aged out.enable learning ports Enables MAC address learning on one or more ports.disable learning portsDisables MAC address learning on one or more portsfor security purposes. If MAC address learning isdisabled, only broadcast traffic and packets destined toa permanent MAC address matching that portnumber, are forwarded. The default setting is enabled.