Packet Header Filtering Criteria - Network Critical SmartNA-X User Manual

3. Enter a unique name for the filter. The name will be used to label maps where the filter is applied.
4. From Packet type, select the packet type to filter on. The packet type corresponds approximately to the EtherType in
the packet header, and determines which additional layer 2, 3 and 4 filter fields are available.
5. If required, refine the filter by specifying layer 2, 3 and 4 filtering criteria.
6. If required, further refine the filter by adding a custom field. Only custom filters which match the packet type are
shown. Specify the values to match in the custom field.
A custom field is "in use" if at least one filter that is required or excluded by at least one map specifies a value to
match for that field.
7. Click Add filter to finish defining the filter.
8. Click Review/apply and review pending changes. To apply these changes to the system, click Apply changes or click
'X' to cancel.
Figure 44: Add filter dialog

Packet header filtering criteria

List of Layer 2, 3 and 4 headers available for packet filters. The system will prevent you from selecting headers which are
incompatible with the specified packet type. For instance, you cannot choose IPv6 packets and IPv4 fragments, or MPLS
and VLAN tags.
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SmartNA-X 1G/10G User Guide 1.4 2015 Network Critical Solutions Limited
SmartNA-X 1G/10G Modular | Restricting Traffic with Filters | 51