
Inbound Traffic Filter Criteria and Actions
3-5
You can combine the Log action with any of the other actions. However, you
should use Log only to record abnormal events; otherwise, the event log will fill
up with filtering messages and thus become useless.
Source Routing Bridge Criteria and Actions
You filter inbound Source Routing traffic based on specified bit patterns contained
within the native source routing bridge (SRB) frame header. IP-encapsulated SRB
traffic filters are not supported.
Predefined Source Routing Criteria
Table 3-2 lists the predefined filtering fields for Source Routing filters and the
reference field, offset, and length value for each criterion.
Note: Circuit names you enter in the Forward to Circuit List window are
case-sensitive. For example, if the circuit name is E21, but you enter it as
e21,
the filter will not work.
Note: Source Routing filters affect both explorer and routed frames. However,
filters that include Next Ring as a criterion affect only routed frames, because
the Next Ring reference field does not appear in explorer frames. Refer to
Configuring Bridging Services for information about explorer and routed
frames.
Table 3-3. Predefined Criteria for Source Routing Bridge
Criterion Name Reference Field Offset (bits) Length (bits)
Next Ring NEXT_RING 0 12
Destination MAC Address HEADER_START 0 48
Source MAC Address HEADER_START 48 48
DSAP DATA_LINK 0 8
SSAP DATA_LINK 8 8
Destination NetBIOS Name DATA_LINK 120 120
Source NetBIOS Name DATA_LINK 248 120
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