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Creating dedicated hardware filters

Before we get into the details of the filter creation, we need to look at the underlying packet

classification process.

Configuring packet classification

Dedicated hardware filters and QoS use the same packet classification process.

The basic construct in the classification process is a classifier. The syntax for creating a

classifier on the switch is:

CREate CLASSifier=rule-id

[MACSaddr={macadd|ANY|DHCPSnooping}]

[MACDaddr={macadd|ANY}][MACSMask=macadd][MACDMask=macadd]

[MACType={L2Ucast|L2Mcast|L2Bcast|ANY}] [TPID={tpid|ANY}]

[VLANPriority={0..7|ANY}] [VLAN={vlanname|1..<VIDMaxUser>|ANY}]

[INNERTpid={tpid|ANY}] [INNERVLANPriority={0..7|ANY}]

[INNERVLANId={vlanname|1..4094|ANY}]

[ETHFormat={802.2-Tagged|802.2-Untagged|ETHII-Tagged|

ETHII-Untagged|NETWARERAW-Tagged|Netwareraw-untagged|

SNAP-Tagged|SNAP-Untagged|ANY}] [PROTocol={protocoltype|IP|IPV6|ANY}]

[IPDScp={dscplist|ANY}] [IPTOs={0..7|ANY}]

[IPSAddr={ipaddmask|ANY|DHCPSnooping}] [IPDAddr={ipaddmask|ANY}]

[IPPRotocol={TCP|UDP|ICMp|IGMp|OSPf|ipprotocolnum|ANY}]

[IPXDAddr={ipxadd|ANY}]

[IPXDSocket={NCP|SAP|RIP|NNB|DIAg|NLSp|IPXwan|ipxsocketnum|ANY}]

[IPXSSocket={NCP|SAP|RIP|NNB|DIAg|NLSp|IPXwan|ipxsocketnum|ANY}]

[TCPSport={portid|port-range|ANY}] [TCPDport={portid|port-range|ANY}]

[UDPSport={portid|port-range|ANY}] [UDPDport={portid|port-range|ANY}]

[L4SMask=mask] [L4DMask=mask] [L5BYTE01=byteoffset,bytevalue[,bytemask]]

[L5BYTE02=byteoffset,bytevalue[,bytemask]]

...

[L5BYTE16=byteoffset,bytevalue[,bytemask]]

[TCPFlags={{Urg|Ack|Rst|Syn|Fin}[,...]|ANY}]

[ICmptype={Any|ECHORply|Unreachable|Quench|Redirect|ECHO|ADvertisement|

ADDRREQ|ADDRREP|NAMEREq|NAMERPly|icmp-type}]

[ICMPCode={Any|FIlter|FRAGMent|FRAGReassm|HOSTComm|HOSTIsolated|HOSTPrec|

icmp-code}]

[IGmptype={ANY|QUery|V1Report|DVmrp|PIMv1|CTRace|V2Report|V2Leave|

type}]

[EIPBYTE01=byteoffset,bytevalue[,bytemask]]

[EIPBYTE02=byteoffset,bytevalue[,bytemask]]

...

[EIPBYTE16=byteoffset,bytevalue[,bytemask]]

From this, it can be seen that there are a large number of different attributes upon which

packets can be classified.

Most of these options are self-evident, but the following sections give more information

about the L4 mask and the "inner" options. For information about the other options, see the

Generic Classifier chapter of the Software Reference.

Page 3 | AlliedWare™ OS How To Note: Hardware Filters

Creating dedicated hardware filters