Reference Guide

1508 | VLAN Stacking
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• If STP is enabled across the Stackable VLAN network, STP BPDUs from the
customer’s networks are consumed and not tunneled across the Stackable VLAN
network unless protocol tunneling is enabled.
Note: For details on protocol tunneling on the E-Series, refer to Chapter 47, Service
Provider Bridging.
• 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. Refer to 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
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}
Version 8.3.19.0 Introduced on S4820T
Version 8.3.7.0 Introduced on S4810
Version 8.3.1.0 Introduced on C-Series and S-Series.