On 7210 SAS-Mxp, 7210 SAS-R6, and 7210 SAS-R12, queue management policies are used to configure the WRED slopes. See Queue management policies for 7210 SAS-Mxp, 7210 SAS-R6, and 7210 SAS-R12 for more information.
Slope policies define the RED slope characteristics as a percentage of the size of the queue on which the policy is applied when the per-port MBS pool configuration is used. When per node MBS pool is in use, the slope parameters are interpreted as a percentage of the logical size for the queue and is not a percentage of the total MBS pool size.
On 7210 SAS-T (network mode and access-uplink mode), default buffer pools exist (logically) at the port levels, when configured to use per port MBS pool and is dependent on the physical port mode:
access egress pool on access ports
network egress pool (in network mode) on network ports and hybrid ports
access uplink egress pool (in access uplink mode) on access ports
By default, each queue on the port is associated with slope-policy default which disables the high-slope, low-slope, and non-TCP slope within the pool.
On the 7210 SAS-Sx/S 1/10GE and 7210 SAS-Sx 1/10GE and 7210 SAS-Sx 10/100GE configured in standalone and standalone-VC mode, default buffer pools exist (logically) at the port levels and is dependent on the port mode:
access egress pool on access ports
network egress pool on network ports and hybrid ports
By default, each queue on the port is associated with slope-policy default, which disables the high-slope and low-slope.
If WRED is not configured, taildrop is used.