Vlan Stacking Packet Drop Precedence; Enabling Drop Eligibility - Dell Z9000 Configuration Manual

Figure 100. Single and Double-Tag TPID Mismatch

VLAN Stacking Packet Drop Precedence

VLAN stacking packet drop precedence is available on the Z9000 platform.
The drop eligible indicator (DEI) bit in the S-Tag indicates to a service provider bridge which packets it
should prefer to drop when congested.

Enabling Drop Eligibility

Enable drop eligibility globally before you can honor or mark the DEI value.
When you enable drop eligibility, DEI mapping or marking takes place according to the defaults. In this
case, the CFI is affected according to the following table.
735
Service Provider Bridging