vlan-stack trunkSpecify a Layer 2 port or port channel as a trunk port to the Stackable VLAN network.C-Series, E-Series, S-Series, Z-Series, S4810Syntax vlan-stack trunkTo remove a trunk port designation from the selected interface, use the no vlan-stacktrunk command.Defaults Not configured.Command Modes INTERFACECommand History Version 8.3.11.1 Introduced on the Z9000.Version 8.3.7.0 Introduced on the S4810.Version 8.2.1.0 Introduced on the E-Series ExaScale. C-Series and S-Series acceptboth bytes of the 2-byte S-Tag TPID.Version 7.8.1.0 Functionality augmented for C-Series and S-Series to enable multi-purpose use of the port.Version 7.7.1.0 Functionality augmented for E-Series to enable multi-purpose use ofthe port.Version 7.6.1.0 Introduced on the C-Series and S-Series.E-Series originalCommandUsageInformationPrior to using this command, you must execute the switchport command to place theinterface in Layer 2 mode.To remove the trunk port designation, the port must first be removed (using the no memberinterface command) from all stackable VLAN-enabled VLANs.Starting with FTOS version 7.7.1.0 for E-Series, the VLAN-Stack trunk port can transparentlytunnel, in a service provider environment, customer-originated xSTP control protocol PDUs.Refer to Service Provider Bridging.Starting with FTOS version 7.8.1.0 for C-Series and S-Series (FTOS version 7.7.1 for E-Series), aVLAN-Stack trunk port is also allowed to be configured as a tagged port and as an untaggedport for single-tagged VLANs. When the VLAN-Stack trunk port is also a member of anuntagged VLAN, the port must be in Hybrid mode. Refer to portmode hybrid.In Example 1 below, a VLAN-Stack trunk port is configured and then also made part of a single-tagged VLAN.In Example 2 below, the tag protocol identifier (TPID) is set to 8848. The “Gi 3/10” port isconfigured to act as a VLAN-Stack access port, while the “TenGi 8/0” port acts as a VLAN-Stack trunk port, switching stackable VLAN traffic for VLAN 10, while also switching untaggedtraffic for VLAN 30 and tagged traffic for VLAN 40. (To allow VLAN 30 traffic, the native VLANfeature is required, by executing the portmode hybrid command. Refer to portmodehybrid in Interfaces.1454
