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For extended ACL, TCP, and UDP filters, you can match criteria on specific or ranges of TCP or UDP ports. For extended ACL
TCP filters, you can also match criteria on established TCP sessions.
When creating an access list, the sequence of the filters is important. You have a choice of assigning sequence numbers to the
filters as you enter them, or the Dell Networking operating system (OS) assigns numbers in the order the filters are created.
The sequence numbers are listed in the display output of the show config and show ip accounting access-list
commands.
Ingress and egress Hot Lock ACLs allow you to append or delete new rules into an existing ACL (already written into CAM)
without disrupting traffic flow. Existing entries in the CAM are shuffled to accommodate the new entries. Hot lock ACLs are
enabled by default and support both standard and extended ACLs and on all platforms.
NOTE: Hot lock ACLs are supported for Ingress ACLs only.
CAM Allocation and CAM Optimization
The S5000 supports the CAM allocation and CAM optimization.
For more information, refer to the following:
● User Configurable CAM Allocation
● CAM Optimization
User Configurable CAM Allocation
Allocate space for IPV6 ACLs by using the cam-acl command in CONFIGURATION mode.
The CAM space is allotted in filter processor (FP) blocks. The total space allocated must equal 13 FP blocks. (There are 16 FP
blocks, but System Flow requires three blocks that cannot be reallocated.)
The default CAM allocation settings for ingress ACL and QoS regions on an S5000 are:
● L2 ACL(l2acl): 4
● L3 ACL (ipv4acl): 4
● IPv6 L3 ACL (ipv6acl): 0
● L3 QoS (ipv4qos): 2
● L2 QoS (l2qos): 1
● L2PT (l2pt): 0
● MAC ACLs (ipmacacl): 0
● ECFMACL (ecfmacl): 0
● VMAN QoS (vman-qos): 0
● VMAN Dual QoS (vman-dual-qos): 0
● FCoE ACL (fcoeacl): 2
● iSCSI Opt ACL (iscsioptacl): 0
Enter the ipv6acl allocation as a factor of 2 (2, 4, 6, 8, 10). All other profile allocations can use either even-numbered or
odd-numbered ranges.
Save the new CAM settings to the startup-config (use write-mem or copy run start) then reload the system for the new
settings to take effect.
For more information, refer to Re-allocating CAM for Ingress ACLs and QoS.
CAM Optimization
When you enable this command, if a policy map containing classification rules (ACL and/or dscp/ ip-precedence rules) is applied
to more than one physical interface on the same port-pipe, only a single copy of the policy is written (only one FP entry is used).
When you disable this command, the system behaves as described in this chapter.
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Access Control Lists (ACLs)