Reference Guide

The following list includes some common TCP port
numbers:
• 23 = Telnet
• 20 and 21 = FTP
• 25 = SMTP
• 169 = SNMP
destination
address
Enter the IPv6 address of the network or host to which the
packets are sent in the x:x:x:x::x format followed by the
prefix length in the /x format. The range is /0 to /128. The ::
notation specifies successive hexadecimal fields of zero.
bit Enter a flag or combination of bits:
• ack: acknowledgement field
• fin: finish (no more data from the user)
• psh: push function
• rst: reset the connection
• syn: synchronize sequence numbers
• urg: urgent field
count (OPTIONAL) Enter the keyword count to count packets
processed by the filter.
byte (OPTIONAL) Enter the keyword byte to count bytes
processed by the filter.
Defaults Not configured.
Command
Modes
ACCESS-LIST
Command
History
Version 9.0.2.0 Introduced on the S6000.
Version 8.4.2.1 Introduced on the S-Series.
Version 8.2.1.0 Introduced on the E-Series TeraScale.
Version 7.8.1.0 Introduced on the C-Series.
Version 7.4.1.0 Introduced on the E-Series TeraScale Added the monitor
option.
Usage
Information
The C-Series cannot count both packets and bytes, so when you enter the count
byte options, only bytes are incremented.
Most ACL rules require one entry in the CAM. However, rules with TCP and UDP
port operators (gt, lt, range) may require more than one entry. The range of
ports is configured in the CAM based on bitmask boundaries; the space required
depends on exactly what ports are included in the range.
1006
IPv6 Access Control Lists (IPv6 ACLs)