Dell Force10 S4820T S4820T Configuration Guide - Page 865

Enable Drop Eligibility You must enable Drop Eligibility globally before you can honor or mark the DEI value. Task Make packets eligible for dropping based on their DEI value. By default, packets are colored green, and DEI is marked 0 on egress. Command Syntax dei enable Command Mode CONFIGURATION When Drop Eligibility is enabled, DEI mapping or marking takes place according to the defaults. In this case, the CFI is affected according to Table 43-3. Table 43-3. Drop Eligibility Behavior Ingress Normal Port Trunk Port Access Port Egress Normal Port Trunk Port Trunk Port DEI Disabled Retain CFI Retain inner tag CFI Retain outer tag CFI Retain inner tag CFI Set outer tag CFI to 0 DEI Enabled Set CFI to 0 Retain inner tag CFI Set outer tag CFI to 0 Retain inner tag CFI Set outer tag CFI to 0 Honor the Incoming DEI Value To honor the incoming DEI value, you must explicitly map the DEI bit to an FTOS drop precedence; precedence can have one of three colors: Precedence Green Yellow Red Description High priority packets that are the least preferred to be dropped. Lower priority packets that are treated as best-effort. Lowest priority packets that are always dropped (regardless of congestion status). Task Command Syntax Command Mode Honor the incoming DEI value by mapping it to an FTOS drop precedence. You may enter the command once for 0 and once for 1. Packets with an unmapped DEI value are colored green. Display the DEI-honoring configuration. dei honor {0 | 1} {green | red | yellow} show interface dei-honor [interface slot/port | linecard number port-set number] INTERFACE EXEC Privilege Service Provider Bridging | 865