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If Drop Eligible Indicator (DEI ) bit is enabled in 802.1ad header or has Canonical Format Identifier (CFI) bit enabled in 802.1q header on an arriving packet, such packets will be dropped using QOS.
Restriction
Use platform acl drop-dei-1-packets command to filter DOT1Q and DOT1AD packets marked with CFI/DEI bits. The feature only matches the outermost tag and the matching on the inner tag is not supported.
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To configure, you need to modify the behavior of the DEI traffic using the CLI commands:
To enable the behavior, use the following CLI command:
platform acl drop-dei-1-packets
To disable the behavior, use the following CLI command:
no platform acl drop-dei-1-packets
Use the following commands to verify the DEI/CFI traffic configuration:
show platform hardware pp active tcam utilization qos detail 0
Device# show platform hardware pp active tcam utilization qos detail 0
This displays TCAM usage of 8 extra entries when command enabled.