LAG Configuration at Port Level

The 7705 SAR allows all configurations on Gen-2 and Gen-3 ports, even if some or all of the configurations are 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: Port Command Applicability for LAG Configurations on Mixed-Generation Hardware lists the port commands that can be affected by LAG configuration, indicates the command’s applicability to 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.

Table: Port Command Applicability for LAG Configurations on Mixed-Generation Hardware
CLI Command	Gen-2 Port	Gen-2 Port on Module^¹	Gen-3 Port	Configuration Behavior
unshaped-if-cir	Supported ^²	Supported ^²	Supported ^³	Allowed on Gen-2 and Gen-3 hardware, but not on Fast Ethernet ports. All port members of the same LAG must have the same value.
unshaped-sap-cir	Supported	Supported	N/A	Allowed on Gen-2 and Gen-3 hardware. All LAG members are allowed if all member ports have the same unshaped-sap-cir value. Change the value only on the primary member. The value is propagated to all other members.
shaper-policy	Supported	Supported	Supported	Allowed on Gen-2 and Gen-3 hardware
cbs	Supported	Supported	Supported	Allowed on Gen-2 and Gen-3 hardware. All LAG members must have the same value. Change the value only on the primary member. The value is propagated to all other members.
src-pause	Enable or disable	Disable	Enable or disable	Allowed to change enable/disable on Gen-2 and Gen-3 hardware, except for a Gen-3 port on a 6-port SAR-M Ethernet Module, where only the no src-pause command is supported and cannot be changed. All LAG members must have same value. Change the value only on the primary member. The value is propagated to all other members.
include-fcs	Enable or disable	Always enabled	Enable or disable	Allowed on Gen-2 and Gen-3 hardware
scheduler-mode (for port)	16-priority	16-priority	4-priority	Allowed to configure per-port independently, whether the port is a standalone or an active/standby member. There is no propagation among ports within the same LAG.

As indicated in Table: Port Command Applicability for LAG Configurations on Mixed-Generation Hardware , 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. 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