Chelsio Communications Terminator 6, Installation And User Manual, Page: 286 / 432

Chapter XX. Classification and Filtering
Chelsio Unified Wire for Linux 286
Hash/DDR Filters
If you wish to create more filters, select T5/T6 Hash Filter configuration tuning option during
installation which allows you to create ~0.5 million filter rules. You can create both LE-TCAM and
Hash/DDR filters in this configuration.
Hash filters are created based on
filterMask tuples in firmware configuration file ( t6-config.txt for
T6 adapters; t5-config.txt for t5 adapters) located in /lib/firmware/cxgb4/ . filterMask tuples should
be either subset of or equal to filterMode tuples.
Hash filters are exact match filters. Hence, when you enable more fields(tuples) in filterMask , you
must create a filter rule with exactly same tuples as mentioned in filterMask .
3.1. Configuration
Filter Modes
The Classification and Filtering feature is configured by specifying the filter modes in the firmware
configuration file located in
/lib/firmware/cxgb4/
Adapter initialization will fail if filterMask contains a tuple which is not present in filterMode .
The following filter tuples are present in filter modes:
fcoe : Fibre Channel over Ethernet frames
port : Packet ingress physical port number
vnic_id : VF ID in MPS TCAM ( Currently not supported ) and outer VLAN ID
vlan : Inner VLAN ID
tos : Type of Service
protocol : IP protocol number (ICMP=1, TCP=6, UDP=17, etc)
ethertype : Layer 2 EtherType
macmatch : MAC index in MPS TCAM
mpshittype : MAC address "match type" (none,unicast,multicast,promiscuous,broadcast)
fragmentation : Fragmented IP packets
Supported Filter Combinations
The following combination is set by default and packets will be matched accordingly:
•
For T5/T6:
filterMode = fragmentation, mpshittype, protocol, vlan, port, fcoe
T5/T6 SO adapters do not support Hash Filters as they are memory free. Up to 496
LE-TCAM filters are supported with Hash Filter configuration.
Note