Просто согласно стандарта IEEE 802.1D-2004 ....
(выдержки, так сказать. Полный - http://standards.ieee.org/getieee802/downl...02.1D-2004.pdf)
...
6.6.5 Categories of service
Filtering services in Bridged Local Area Networks fall into the following categories:
a) Basic Filtering Services. These services are supported by the Forwarding Process (7.7) and by Static Filtering Entries (7.9.1) and Dynamic Filtering Entries (7.9.2) in the Filtering Database. The information contained in the Dynamic Filtering Entries is maintained through the operation of the Learning Process (7.8).
...
7.9.1 Static Filtering Entries
A Static Filtering Entry specifies
a) A MAC Address specification, comprising
1) An Individual MAC Address; or
2) A Group MAC Address; or
3) All Group Addresses, for which no more specific Static Filtering Entry exists; or
4) All Unregistered Group Addresses, for which no more specific Static Filtering Entry exists.
b) A Port Map, containing a control element for each outbound Port, specifying that a frame with a destination MAC Address that meets this specification is to be
1) Forwarded, independently of any dynamic filtering information held by the Filtering Database; or
2) Filtered, independently of any dynamic filtering information; or
3) Forwarded or filtered on the basis of dynamic filtering information, or on the basis of the default Group filtering behavior for the outbound Port (7.9.4) if no dynamic filtering information is present specifically for the MAC Address.
All Bridges shall have the capability to support the first two values for the MAC Address specification, and the first two values for each control element for all Static Filtering Entries [i.e., shall have the capability to support items a1), a2), b1), and b2) above].
...
...
7.9.2 Dynamic Filtering Entries
A Dynamic Filtering Entry specifies
a) An individual MAC Address.
b) A Port Map consisting of a control element that specifies forwarding of frames destined for that
MAC Address to a single Port.
NOTE 1—This is equivalent to specifying a single port number; hence, this specification is directly equivalent to the specification of dynamic entries in IEEE Std 802.1D, 1993 Edition.
...
Т.е. вроде как возможно создание нескольких одинаковых статических записей на разных портах…
