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Configuring ACLs Configuring ACLs
OmniSwitch 6800/6850/9000 Network Configuration Guide June 2006 page 27-11
Layer 2 ACL Example
In this example, the default bridged disposition is accept (the default). Since the default is accept, the qos
default bridged disposition command would only need to be entered if the disposition had previously
been set to deny. The command is shown here for completeness.
-> qos default bridged disposition accept
-> policy condition Address1 source mac 080020:112233 source vlan 5
-> policy action BlockTraffic disposition deny
-> policy rule FilterA condition Address1 action BlockTraffic
In this scenario, traffic with a source MAC address of 08:00:20:11:22:33 coming in on VLAN 5 would
match condition Address1, which is a condition for a policy rule called FilterA. FilterA is then applied to
the flow. Since FilterA has an action (BlockTraffic) that is set to deny traffic, the flow would be denied
on the switch.
Note that although this example contains only Layer 2 conditions, it is possible to combine Layer 2 and
Layer 3 conditions in the same policy.
Layer 3 ACLs
The QoS software in the switch filters routed and bridged traffic at Layer 3.
For Layer 3 filtering, the QoS software in the switch classifies traffic based on:
Source IP address or source network group
Destination IP address or destination network group
IP protocol
ICMP code
ICMP type
Source TCP/UDP port
Destination TCP/UDP port or service or service group
The following policy condition keywords are used for Layer 3 ACLs:
Note that combining Layer 2 and Layer 3 conditions in the same policy is supported. Refer to “Condition
Combinations” on page 26-6 and “Action Combinations” on page 26-8 in Chapter 26, “Configuring QoS.”
Layer 3/4 ACL Condition Keywords
source ip
source network group
destination ip
destination network group
multicast ip
multicast network group
ip protocol
source ip port
destination ip port
icmptype
icmpcode
tos
dscp
source tcp port
destination tcp port
source udp port
destination udp port
service
service group
established
tcpflags (except ECN and CWR)
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