Reference Guide

258 | Content Addressable Memory (CAM)
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CAM Profiling for ACLs
CAM Profiling for ACLs is supported on platform e
t
only.
The default CAM profile has 1K Layer 2 ingress ACL entries. If you need more memory for Layer 2
ingress ACLs, select the profile
l2-ipv4-inacl.
When budgeting your CAM allocations for ACLs and QoS configurations, remember that ACL and QoS
rules might consume more than one CAM entry depending on complexity. For example, TCP and UDP
rules with port range options might require more than one CAM entry.
The Layer 2 ACL CAM partition has sub-partitions for several types of information. Table 10-4 lists the
sub-partition and the percentage of the Layer 2 ACL CAM partition that FTOS allocates to each by default.
You can re-configure the amount of space, in percentage, allocated to each sub-partition
. As with the
IPv4Flow partition, you can configure the Layer 2 ACL partition from EXEC Privilege mode or
CONFIGURATION mode.
lag-hash-mpls For hashing based on MPLS labels (up to five labels deep). With the default microcode, MPLS
packets are distributed over a port-channel based on the MAC source and destination address. With
the lag-hash-mpls microcode, MPLS packets are distributed across the port-channel based on IP
source and destination address and IP protocol. This is applicable for MPLS packets with up to five
labels. When the IP header is not available after the 5th label, hashing for default load-balance is
based on MPLS labels. For packets with more than 5 labels, hashing is always based on the MAC
source and destination address.
ipv6-extacl Use this microcode when IPv6 is enabled.
acl-group For applications that need 16k egress IPv4 ACLs (for example, the VLAN ACL Group feature,
which permits group VLANs IP egress ACLs.
Table 10-4. Layer 2 ACL CAM Sub-partition Sizes
Partition % Allocated
Sysflow 6
L2ACL 14
PVST 50
QoS 12
L2PT 13
FRRP 5
Table 10-3. Microcode Descriptions
Microcode Description