Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 119
As indicated in Table 14, each generation of adapter card uses its own configured
scheduler mode, or uses the only command option available for Gen-2 and Gen-3
adapter cards, whereas Gen-1 adapter cards use their own adapter card
configuration. For example, on a LAG where:
• one member link is on Gen-2 hardware
− this port uses 16-priority scheduler mode, which is the default mode and
cannot be changed
• one member link is on Gen-3 hardware
− this port uses 4-priority (Gen-3) scheduler mode, which is the default mode
and cannot be changed
• one member link is on Gen-1 hardware
− this port uses its configured scheduler mode (profiled or 4-priority), which is
dictated via the configuration applied to the port
3.2.14 LAG and ECMP Hashing
If it is necessary to increase the available bandwidth for a logical link that exceeds
the physical bandwidth or to add redundancy for a physical link, typically one of two
methods is applied: LAG or ECMP. A system can also deploy both at the same time
using ECMP of two or more LAGs and/or single links.
The 7705 SAR supports per-flow and per-service hashing, as described in the
following sections:
• Per-Flow Hashing
• Per-Service Hashing
• LSR Hashing
• Layer 4 Load Balancing
• TEID Hashing for GTP-encapsulated Traffic
• Entropy Labels
Note: For general information on LAG, see LAG. For general information on ECMP, refer
to the 7705 SAR Router Configuration Guide, “Static Routes, Dynamic Routes, and ECMP”.
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