Allied Telesis AT-S63 - Manual (Page 280)

Chapter 17: Classifier Commands
280 Section II: Advanced Operations
udpdport Specifies a destination UDP port.
tcpflags Specifies a TCP flag. Options are
URG - Urgent
ACK - Acknowledgement
RST - Reset
PSH - Push
SYN - Synchronization
FIN - Finish
Description
This command creates a classifier. A classifier defines a traffic flow. A
traffic flow consists of packets that share one or more characteristics. A
traffic flow can range from being very broad to very specific. An example
of the former might be all IP traffic while an example of the latter could be
packets with specific source and destination MAC addresses.
You use classifiers with access control lists (ACL) and Quality of Service
policies to define the traffic flow to be affected by the ACL or QoS.
If you create a classifier without any parameters, then all incoming packets
are classified.
The ANY option of a parameter is used when you want to delete the
current setting of a parameter without setting a new value. This leaves the
parameter blank so that it applies to all packets.
Note
For definitions and restrictions on the classifier variables, refer to the
Chapter 14, “Classifiers” in the AT-S63 Management Software
Menus Interface User’s Guide.
Examples
This command creates a classifier for all IP traffic:
create classifier=4 description=”IP flow” protocol=ip
This command creates a classifier for all traffic originating from the subnet
149.22.22.0 destined to the device with the IP address 149.44.44.11:
create classifier=4 description=”subnet flow”
ipsaddr=149.22.22.0/24 ipdaddr=149.44.44.11
This command creates a classifier for all HTTPS web traffic with a
destination IP address of 149.44.44.44: