Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 249
Unified Forwarding Table (UFT) Modes, Configuring UFT Modes, LAG Hashing Based on Bidirectional Flow
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• If an IP header is not found after the fifth label, hashing is based on the MPLS labels. • If the packet has more than five MPLS labels, hashing is based on the source and destination MAC address. To enable this type of hashing, use the default CAM profile with the microcode lag-hash-mpls. LAG Hashing Based on Bidirectional Flow To hash LAG packets such that both directions of a bidirectional flow (for example, VoIP or P2P file sharing) are mapped to the same output link in the LAG bundle, use the default CAM profile with the microcode lag-hash-align. Unified Forwarding Table (UFT) Modes Unified Forwarding Table (UFT) consolidates the resources of several search tables (Layer 2, Layer 3 Hosts, and Layer 3 Route [Longest Prefix Match - LPM]) into a single flexible 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 profile, 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 10. 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 unified 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. Configuring UFT Modes To configure the Unified 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)# Content Addressable Memory (CAM) 249
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