Cabletron Systems CSX400 Configuring the Filtering Database, Aging Time, Source Port, Receive Port

Bridging

Aging Time

Indicates the length of time, in seconds, that Dynamic and Learned Addresses in the Source Address Table are allowed to remain inactive before they are dropped from the database. The allowable time range for these entries is 10 to 1,000,000 seconds. Aging time is not applicable to Static or Permanent entries. You can conÞgure this Þeld, as described in the next section.

The following Þelds are applicable to the scrollable Address Entry panel of

Filtering Database entries.

Address

Lists the addresses for which the bridgeÕs Filtering Database has forwarding and/or Þltering information.

Type

Indicates the type of an entry in the database. The possible types are Static, Dynamic, Learned, Self, or Permanent. You can alter the entry type, as described in the next section.

Source Port

Indicates the port number on which the address entry was Þrst detected. A question mark (?) indicates that the address entry was not a learned entry, but Port Filtering information applies to it (i.e., the entry is a created Permanent, Dynamic, or Static entry and has corresponding Þltering information).

Receive Port

Indicates the number of the port on which a frame must be received in order for the entryÕs Port Filtering information to apply. An asterisk (*) indicates that the receive port is promiscuous, and applies to all ports of the bridge (assuming no conßicting entry applies). You can change the receive port, as described in the following section.

Port Filtering

Indicates the action that will take place at each bridge port when it receives frames from the selected address entry. A green arrow indicates that the frames received from the address will be forwarded to the portÕs associated segment

(). A red circle indicates that frames will be Þltered (blocked) from the portÕs associated segment ( ). You can change the Port Filtering action, as described in the next section. (Note that port Þltering is scrollable among all the potential ports; however, only two consecutive ports can be viewed simultaneously.)

Configuring the Filtering Database

You can conÞgure the Filtering Database by:

¥Altering the Aging Time for Dynamic and Learned entries.

¥Changing the type of entry with the Type buttons.

4-46 Filtering Database