Specifications

8-56 Rapier Switch Software Reference
Software Release 2.7.3
C613-03098-00 REV A
• Physical source/destination port
• Layer 3 protocol
• Source/destination IP address
• Destination IPX address
• Layer 4 protocol (for example: TCP/UDP/Socket number)
• Layer 4 source/destination ports
• Any 16-bit word in the first 64 bytes of a packet
See Chapter 34, Generic Packet Classifier for information on configuring
classifiers.
Hardware-based packet filters can be configured by the user to take action
upon the results of the classification tables. These actions are:
• Discard the packet
• Forward the packet
• Send the packet to the mirror port
• Forward the packet to a specified egress port, for unicast packets
• Send the packet to a Class of Service queue
• Replace the packet’s 802.1p priority
The filter can also perform the following Quality of Service actions for Rapier i
Series switches only:
• Replace the packet’s IP TOS value and/or the IP DSCP value.
• Direct non-unicast packets that were scheduled to be dropped or sent to
the CPU to a specified port.
• Forward packets that were marked to be dropped. This option allows
bandwidth limiting to be overridden for particular packets.
For Rapier i Series switches, all actions are also available on packets that match
the ingress and egress ports of the classifier (if either or both are set), but do not
match the classifier’s other parameters.
For more information about the circumstances when hardware filters are useful
for performing QoS on Rapier i Series switches, see Table 35-1 on page 35-6 in
Chapter 35, Quality of Service (QoS) on Switch Ports.
A classifier-based packet filter comprises a single classifier entry. A number of
filters can be created at one time with the same action by specifying a list of
classifiers, but each classifier is contained in a single filter. The number of
packet filters supported by the switch is determined by the switch model and
how different each filter is.
How to create
classifier-based filters
To create a hardware-based packet filter:
1. Create the classifier by using the command:
create classifier=1..9999 [classifier-options...]