Resequencing Match/Ignore Statements - HP 3500 Series Advanced Traffic Management Manual

Classifier-Based Software Configuration
Traffic Classes
IPv6 mask
IPv6 address entered with a "match"
command
Other matching IPv6 addresses
Figure 8-6. Example: How Hexadecimal C in an IPv6 Mask Matches Four IPv6 Addresses
8-24
Figure 8-6 shows how the binary equivalent (1100) of the "C" value in the last
block of the resulting IPv6 mask supports four possible combinations (D37C,
D37D, D37E, and D37F) in the last block of a matching IPv6 address. There-
fore, the IPv6 mask that results from a /126 prefix-length matches inbound
traffic from four IPv6-based devices.
1st 2nd
Block Block
FFFF FFFF
2001 DB8
2001 DB8
2001 DB8
2001 DB8
CIDR Notation. For more detailed information on how to use CIDR nota-
tion to specify masks in match criteria, refer to the "How an ACE Uses a Mask
To Screen Packets for Matches" section in the Access Control Lists (ACLs)
chapter in the Access Security Guide.

Resequencing Match/Ignore Statements

You can use the class command with the resequence option to reconfigure the
number at which the first match/ignore statement in the class starts, and reset
the interval used to number other match/ignore statements.
Resequencing match/ignore statements is useful when you want to insert a
new match/ignore statement between two numbered entries (see Figure 8-7).
Context: Global configuration
Syntax: class resequence [ipv4 | ipv6] <name> < seq-number > < interval >
resequence: Resets the sequence numbers for all match/ignore
statements in the class.
<name> : Replace with the name of the class that contains the
match/ignore statements that you want to resequence.
< seq-number > : Specifies the sequence number of the first
match/ignore statement in the class. Default: 10.
< interval > : Specifies the interval between sequence numbers of
match/ignore statements in the class to allow additional
match/ignore statements to be inserted. Default: 10.
3rd 4th 5th
Block Block Block
FFFF FFFF FFFF
0000 0000 244
0000 0000 244
0000 0000 244
0000 0000 244
6th 7th 8th
Block Block Block
FFFF FFFF FFFC
17FF FEB6 D37D
17FF FEB6 D37C
17FF FEB6 D37E
17FF FEB6 D37F