IBM 8260 manual Permanent$, Static, Management%

−Permanent($)

These are manually entered addresses which are stored in the FLASH memory.

−Static (*)

These are entries that have been entered manually. They cannot be aged-out of the filtering database, but will be lost during a module Reset. Usually the manually entered addresses are permanent and are retained in the FLASH memory which results in them being retained during the module reset. But, if the FLASH is too full to store the address, that address becomes static.

−Management(%)

These addresses are internal addresses used by the Multiprotocol Interconnect module and cannot be altered. They include addresses used by the Hello BPDU of the spanning tree protocol as well as the MAC addresses of the LAN ports.

To add a permanent or static entry to the filtering database, select Add Entry from this panel. You will then be allowed to enter the following via a pop-up panel:

∙

∙

∙

MAC address

Disposition

Scope

Permanent or static entries from the filtering database can be deleted using the Delete Entry option on this panel.

The Freeze Database option allows you to freeze the filtering database and make all the entries either permanent (if there is space in FLASH) or static. Once the database is frozen, no new entries may be learned, and no entries may be added, deleted, or forgotten.

The Multiprotocol Interconnect module will add addresses to the filtering database under the following conditions:

1.Bridging is enabled for the module

2.Source Address Learning is enabled for the receiving port

3.The receiving port is in forwarding or learning state

4.The source address is a unicast address

5.A fixed entry for the address does not already exist

6.There is space in the database. If the database is full, the Multiprotocol Interconnect module will try to find an entry for which its time-to-forget has expired. If such an entry is found, it is deleted and the new address is learned (added to the database). If there is no room in the database and a forgotten entry is not found the address is not learned.

The learned addresses are not kept in the filtering database forever. The Multiprotocol Interconnect module keeps track of each learned entry in the filtering database and deletes it when it has not been used for a specified length of time. This process keeps the database up-to-date and prevents it from running out of space.

272 8260 Multiprotocol Intelligent Switching Hub