Administrator Guide

ipv4-320k Enable 320K CAM profile
ipv4-egacl-16k Enable CAM profile with 16K IPv4 egress ACL
ipv6-extacl Enable CAM profile with extended ACL
l2-ipv4-inacl Enable CAM profile with 32K L2 and 28K IPv4 ingress ACL
unified-default Enable default unified CAM profile
Dell(conf)#cam-profile default microcode ?
default Enable default microcode
lag-hash-align Enable microcode with LAG hash align
lag-hash-mpls Enable microcode with LAG hash MPLS
Dell(conf)#cam-profile default microcode default
Dell(conf)#cam-ipv4flow ?
default Reset IPv4flow CAM entries to default setting
multicast-fib Set multicast FIB entries
Dell(conf)#cam-l2acl ?
default Reset L2-ACL CAM entries to default setting
system-flow Set system flow entries
CAM Optimization
The cam-optimization command allows you to optimize CAM utilization for QoS entries by minimizing the amount of required policy-
map CAM space.
When you enable this command, if a Policy Map containing classication 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 1 FP entry is used). When you disable this
command, the system behaves as described in this chapter.
Applications for CAM Proling
The following describes link aggregation group (LAG) hashing.
LAG Hashing
The Dell Networking OS includes a CAM prole and microcode that treats MPLS packets as non-IP packets. Normally, switching and LAG
hashing is based on source and destination MAC addresses. Alternatively, you can base LAG hashing for MPLS packets on source and
destination IP addresses. This type of hashing is allowed for MPLS packets with ve labels or less.
MPLS packets are treated as follows:
• When MPLS IP packets are received, the system looks up to ve labels deep for the IP header.
• When an IP header is present, hashing is based on IP three tuples (source IP address, destination IP address, and IP protocol).
• If an IP header is not found after the fth label, hashing is based on the MPLS labels.
• If the packet has more than ve MPLS labels, hashing is based on the source and destination MAC address.
To enable this type of hashing, use the default CAM prole with the microcode lag-hash-mpls.
LAG Hashing Based on Bidirectional Flow
To hash LAG packets such that both directions of a bidirectional ow (for example, VoIP or P2P le sharing) are mapped to the same
output link in the LAG bundle, use the default CAM prole with the microcode lag-hash-align.
Unied Forwarding Table (UFT) Modes
Unied Forwarding Table (UFT) consolidates the resources of several search tables (Layer 2, Layer 3 Hosts, and Layer 3 Route [Longest
Prex Match — LPM]) into a single exible resource. Dell Networking OS supports several UFT modes to extract the forwarding tables, as
required. By default, Dell Networking OS initializes the table sizes to UFT mode 2 prole, since it provides a reasonable shared memory for
all the tables. The other supported UFT modes are scaled-l3–hosts (UFT mode 3) and scaled-l3–routes (UFT mode 4).
Content Addressable Memory (CAM)
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