Users Guide

Dell(conf-if-gi-1/1)#vlan-stack trunk
Dell(conf-if-gi-1/1)#show config
!
interface GigabitEthernet 1/1
no ip address
portmode hybrid
switchport
vlan-stack trunk
shutdown
Dell(conf-if-gi-1/1)#interface vlan 100
Dell(conf-if-vl-100)#untagged gigabitethernet 1/1
Dell(conf-if-vl-100)#interface vlan 101
Dell(conf-if-vl-101)#tagged gigabitethernet 1/1
Dell(conf-if-vl-101)#interface vlan 103
Dell(conf-if-vl-103)#vlan-stack compatible
Dell(conf-if-vl-103-stack)#member gigabitethernet 1/1
Dell(conf-if-vl-103-stack)#do show vlan
Codes: * - Default VLAN, G - GVRP VLANs
Q: U - Untagged, T - Tagged
x - Dot1x untagged, X - Dot1x tagged
G - GVRP tagged, M - Vlan-stack
NUM Status Description Q Ports
* 1 Inactive
100 Inactive U Gi 1/1
101 Inactive T Gi 1/1
103 Inactive M Gi 1/1
Debugging VLAN Stacking
To debug VLAN stacking, use the following command.
• Debug the internal state and membership of a VLAN and its ports.
debug member
Example of Debugging a VLAN and its Ports
The port notations are as follows:
• MT — stacked trunk
• MU — stacked access port
• T — 802.1Q trunk port
• U — 802.1Q access port
• NU — Native VLAN (untagged)
Dell# debug member vlan 603
vlan id : 603
ports : Gi 2/4 (MT), Gi 3/1(MU), Gi 3/25(MT), Gi 3/26(MT), Gi 3/27(MU)
Dell#debug member port gigabitethernet 2/4
vlan id : 603 (MT), 100(T), 101(NU)
Dell#
VLAN Stacking in Multi-Vendor Networks
The rst eld in the VLAN tag is the tag protocol identier (TPID), which is 2 bytes. In a VLAN-stacking network, after the frame is double
tagged, the outer tag TPID must match the TPID of the next-hop system.
While 802.1Q requires that the inner tag TPID is 0x8100, it does not require a specic value for the outer tag TPID. Systems may use any 2-
byte value; Dell Networking OS uses 0x9100 (shown in the following) while non-Dell Networking systems might use a dierent value.
690
Service Provider Bridging