Intel ER8100STUS - Express 8100 Router, Reference Manual

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Reference.bok : Chapter10 99 Wed Apr 22 10:58:08 1998
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How Bridging Works
WAN Bridging Services
Source Forwarding Table
The Source Forwarding Table contains the network access rights for associated
source MAC addresses. Each entry in the table consist of a source MAC address,
the incoming link and allowed outgoing link. For example:
Note
For entries in the Source Forwarding Table, the incoming link can only
be
All
when the outgoing link is
None
.
The Source Forwarding Table can only contain static entries defined by the op-
erator during configuration of the router. Up to 62 entries can be defined.
Default bridge action
from unknown sources
The bridge can be set up to either forward to all links (default) or discard Multi-
cast packets from source addresses which do not appear in the Source Forward-
ing Tables. This feature which prevents Multicast packets from unknown source
MAC addresses from being forwarded over WAN links, and can be used when a
central site router is communicating with a number of remote devices.
Source Forwarding Table (example)
Source MAC Address Incoming Link Outgoing Link
000080222222 LAN link WAN link 1
0000800000CC LAN link WAN link 2
0000800000DD WAN link 1 WAN link 2
0000800000EE All WAN link 1
0000800000FF All None
and so on.