Reference Guide

Service Provider Bridging | 759
Mark Egress Packets with a DEI Value
On egress, you can set the DEI value according to a different mapping than ingress (Refer to Honor the
Incoming DEI Value).
Dynamic Mode CoS for VLAN Stacking
Dynamic Mode CoS for VLAN Stacking is available only on platforms: s z
One of the ways to ensure quality of service for customer VLAN-tagged frames is to use the 802.1p
priority bits in the tag to indicate the level of QoS desired. When an S-Tag is added to incoming customer
frames, the 802.1p bits on the S-Tag may be configured statically for each customer or derived from the
C-Tag using Dynamic Mode CoS. Dynamic Mode CoS maps the C-Tag 802.1p value to a S-Tag 802.1p
value.
FTOS#show interface dei-honor
Default Drop precedence: Green
Interface CFI/DEI Drop precedence
-------------------------------------------------------------
Te 0/1 0 Green
Te 0/1 1 Yellow
Te 8/9 1 Red
Te 8/40 0 Yellow
Task Command Syntax Command Mode
Set the DEI value on egress according to the color
currently assigned to the packet.
dei mark {green | yellow} {0 | 1} INTERFACE
Display the DEI-marking configuration. show interface dei-mark [interface slot/
port | stack-unit number port-set
number]
EXEC Privilege
FTOS#show interface dei-mark
Default CFI/DEI Marking: 0
Interface Drop precedence CFI/DEI
------------------------------------------------
Te 0/1 Green 0
Te 0/1 Yellow 1
Te 8/9 Yellow 0
Te 8/40 Yellow 0
Task Command Syntax Command Mode