Discard Eligibility Indicator (DEI) based Classification
7210 SAS D, E, K OS Quality of Service Guide Page 91
DEI based marking on 7210 SAS-D
DEI based marking is supported on access ports, access-uplink ports and network ports. DEI bit
can be used to mark the packet to carry the profile, assigned by an operator’s trusted node at the
ingress to the carrier’s network, to the subsequent nodes in the network. It allows high-priority in-
profile packet to be allocated appropriate resources by all the network nodes on the path to the
final destination. Similarly, it allows out-of-profile packets to be treated with less preference
compared to in-profile packets by all the network nodes on the path to the final destination. The
egress marking behavior must be symmetric to the ingress classification behavior.
The following support is available for DEI based marking:
• Option to mark DEI bits for access SAP egress on access ports and hybrid ports on 7210
SAS devices configured in network mode.
• Option to mark DEI bits for port egress on access ports and access-uplink ports on 7210
SAS devices configured in access-uplink mode.
• Option to mark DEI bits for IP and MPLS packets on network ports.
• By default, in-profile packets are marked with DEI bit of 0 and out-of-profile packets are
marked with DEI bit of 1. The user has an option to mark all the packets belonging to a FC
to the same DEI value irrespective of its profile using the “force-de-mark” option.
NOTE: For information on the CLI commands for DEI, see Network QoS Policy Command
Reference on page 147 and Access Egress QoS Policy Command Reference on page 353. and the
“7210 SAS Basic Systems Configuration User Guide”.
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