Cuda 12000 IP Access Switch CLI-based Administration Guide
Configuring Filter Groups 499
TCP Flag Optional. The value of the TCP flags. The
following is a list of the TCP flag options.
Leaving this field blank indicates a null value
(no flags).
■urgent: The TCP segment is marked
urgent.
■ack: The acknowledgement number field
in the TCP field segment is significant.
■push: The TCP software must push all the
data sent, so far, through the connection
to the receiving application.
■reset: The connection is reset.
■syn: The sequence numbers are
resynchronized, marking the beginning of
a connection.
■fin: The transmitting CPE has no data to
transmit.
TCP flags must always be a subset of the TCP
flag mask in order for the packet header to be
matched. For example, to match all packets
where only the “urgent” flag is set, and the
mask is set at “syn, and fin,” the resulting
flag values would be “urgent” and the mask
would be:
“urgent, syn, fin.”
TCP Mask Optional. The flag of interest in the T CP
header for the packet to match. Leaving this
field blank indicates a null value (no flags).
The following is a list of the options. Refer to
the above “TCP Flag” list for descriptions.
■urgent
■ack
■push
■reset
■syn
■fin
Parameter Description