Reference Guide

1160 | VLAN Stacking
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• Layer 3 protocols are not supported on a Stackable VLAN network.
• Assigning an IP address to a Stackable VLAN is supported when all the members are only
Stackable VLAN trunk ports. IP addresses on a Stackable VLAN-enabled VLAN is not supported
if the VLAN contains Stackable VLAN access ports. This facility is provided for SNMP
management over a Stackable VLAN enabled VLAN containing only Stackable VLAN trunk
interfaces. Layer 3 routing protocols on such a VLAN are not supported.
• It is recommended that you do not use the same MAC address, on different customer VLANs, on
the same Stackable VLAN.
• Interfaces configured using Stackable VLAN access or Stackable VLAN trunk commands will not
switch traffic for the default VLAN. These interfaces will switch traffic only when they are added
to a non-default VLAN.
• Starting with FTOS 7.8.1 for C-Series and S-Series (FTOS 7.7.1 for E-Series, 8.2.1.0 for E-Series
ExaScale), a vlan-stack trunk port is also allowed to be configured as a tagged port and as an
untagged port for single-tagged VLANs. When the vlan-stack trunk port is also a member of an
untagged vlan, the port should be in hybrid mode. See portmode hybrid.
dei enable
c s
Make packets eligible for dropping based on their DEI value.
Syntax
dei enable
Defaults
Packets are colored green; no packets are dropped.
Command Mode
CONFIGURATION
Command
History
dei honor
c s
z
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.
Syntax
dei honor {0 | 1} {green | red | yellow}
Parameters
Defaults
Disabled; Packets with an unmapped DEI value are colored green.
Command Mode
INTERFACE
Version 8.3.7.0 Introduced on S4810.
Version 8.3.1.0 Introduced on C-Series and S-Series.
0 | 1 Enter the bit value you want to map to a color.
green | red |
yellow
Choose a color:
• Green: High priority packets that are the least preferred to be dropped.
• Yellow: Lower priority packets that are treated as best-effort.
• Red: Lowest priority packets that are always dropped (regardless of congestion
status).