Configure Layer 2 And Layer 3 Acls - Dell S6000–ON Configuration Manual
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Also See for S6000–ON:
- Getting started manual (26 pages) ,
- Troubleshooting manual (29 pages) ,
- Installation manual (41 pages)
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Example of Viewing Filter Sequence for a Specified Extended ACL
Dell(config-ext-nacl)#deny tcp host 123.55.34.0 any
Dell(config-ext-nacl)#permit udp 154.44.123.34 0.0.255.255 host 34.6.0.0
Dell(config-ext-nacl)#show config
!
ip access-list extended nimule
seq 5 deny tcp host 123.55.34.0 any
seq 10 permit udp 154.44.0.0 0.0.255.255 host 34.6.0.0
Dell(config-ext-nacl)#
To view all configured IP ACLs and the number of packets processed through the ACL, use the show ip
accounting access-list command in EXEC Privilege mode, as shown in the first example in
Configure a Standard IP ACL
Configure Layer 2 and Layer 3 ACLs
Both Layer 2 and Layer 3 ACLs may be configured on an interface in Layer 2 mode.
If both L2 and L3 ACLs are applied to an interface, the following rules apply:
•
When Dell Networking OS routes the packets, only the L3 ACL governs them because they are not
filtered against an L2 ACL.
•
When Dell Networking OS switches the packets, first the L3 ACL filters them, then the L2 ACL filters
them.
•
When Dell Networking OS switches the packets, the egress L3 ACL does not filter the packet.
For the following features, if you enable counters on rules that have already been configured and a new
rule is either inserted or prepended, all the existing counters are reset:
•
L2 ingress access list
•
L3 egress access list
•
L2 egress access list
If a rule is simply appended, existing counters are not affected.
Table 6. L2 and L3 Filtering on Switched Packets
L2 ACL Behavior
Deny
Deny
Permit
Permit
NOTE: If you configure an interface as a vlan-stack access port, only the L2 ACL filters the packets.
The L3 ACL applied to such a port does not affect traffic. That is, existing rules for other features
(such as trace-list, policy-based routing [PBR], and QoS) are applied to the permitted traffic.
For information about MAC ACLs, refer to
112
Filter.
L3 ACL Behavior
Deny
Permit
Deny
Permit
Layer
2.
Decision on Targeted Traffic
L3 ACL denies.
L3 ACL permits.
L3 ACL denies.
L3 ACL permits.
Access Control Lists (ACLs)
- Quick Links:
- Default Configuration
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Troubleshooting
