Users Guide

• 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).
Table 11. UFT Modes —Table Size
UFT Mode L2 MAC Table Size L3 Host Table Size L3 LPM Table Size
Default 160K 144K 16K
Scaled-l3-hosts 96K 208K 16K
Scaled-l3-routes 32K 16K 128K
NOTE: On the C9010, OpenFlow supports only the scaled-l3-hosts hardware forwarding-table mode (UFT mode 3), providing a
unied forwarding table (UFT) of:
• L2 MAC entries: 160K
• L3 host entries: 144K
• L3 route entries: 16K
OpenFlow does not support the scaled-l3-routes forwarding-table mode (UFT mode 4) on the C9010.
Conguring UFT Modes
To congure the Unied Forwarding Table (UFT) modes, follow these steps.
1 Select a mode to initialize the maximum scalability size for L2 MAC table or L3 Host table or L3 Route table.
CONFIGURATION
hardware forwarding-table mode
Dell(conf)#hardware forwarding-table mode ?
scaled-l3-hosts Forwarding table mode for scaling L3 host entries
scaled-l3-routes Forwarding table mode for scaling L3 route entries
Dell(conf)#
Dell(conf)#hardware forwarding-table mode scaled-l3-hosts
Hardware forwarding-table mode is changed. Save the configuration and reload to take effect.
Dell(conf)#end
Dell#write mem
!
01:13:36: %STKUNIT0-M:CP %FILEMGR-5-FILESAVED: Copied running-config to startup-config in
flash by default
Content Addressable Memory (CAM)
243