Interface Configuration Guide 7705 SAR Interfaces
Edition: 01 3HE 11011 AAAC TQZZA 117
− For the reverse case, when LAG active/standby switching occurs from an
active Gen-2-based port to an active Gen-3-based port, traffic management
is changed from a 16-priority scheduler with H-QoS using the agg-rate and
the cir-rate, to a 4-priority (Gen-3) scheduler with H-QoS enabled using the
agg-rate and the cir-rate.
• If scheduler-mode is 16-priority mode on the LAG SAP, the combination of a
Gen-1-based port with a Gen-2-based or Gen-3-based port is blocked because
Gen-1 adapter cards do not support 16-priority mode. The only valid option for
this combination of ports is 4-priority scheduling mode.
Lastly, for LAG on access ports, the primary port configuration settings are applied
to both the primary and secondary LAG ports. Therefore, in order to support
unshaped SAPs when the primary port is a Gen-3-based port and the secondary port
is a Gen-2-based port, configuring the unshaped-sap-cir on the Gen-3-based port
is allowed, even though it does not apply to the Gen-3-based port. This is because
unshaped-sap-cir is needed by the secondary Gen-2-based port when it becomes
the active port. The full command is config>port>ethernet>access>egress>
unshaped-sap-cir cir-rate.
3.2.13.8.2 LAG Configuration at Port Level
The 7705 SAR allows all configurations on Gen-1, Gen-2, and Gen-3 ports, even if
some or all of the configuration is not applicable to all the ports. The software uses
only the settings that are applicable to the particular port and ignores those that are
not applicable. Any change to the primary LAG member configuration propagates to
all non-primary ports.
Table 14 lists the port commands that can be affected by LAG configuration,
indicates the command’s applicability to Gen-1, Gen-2, and Gen-3 ports, and
describes the LAG behavior for mixed LAG configuration.
Note: For LAG on network ports, the egress-rate, unshaped-if-cir, and network-queue
policy can only be configured on the primary LAG port and this configuration is propagated
to the other LAG members.
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