Reference Guide

802 | Service Provider Bridging
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Figure 45-1. VLAN Stacking in a Service Provider Network
Important Points to Remember
• Interfaces that are members of the Default VLAN and are configured as VLAN-Stack access or trunk
ports do not switch untagged traffic. To switch traffic, these interfaces must be added to a non-default
VLAN-Stack-enabled VLAN.
• Dell Networking cautions against using the same MAC address on different customer VLANs, on the
same VLAN-Stack VLAN.
• You cannot ping across a trunk port link if one or both of the systems is an S5000.
• This limitation becomes relevant if you enable the port as a multi-purpose port (carrying single-tagged
and double-tagged traffic).
Configuring VLAN Stacking
Configuring VLAN-Stacking is a three-step process:
1. Create access and trunk ports. See page 803.
2. Assign access and trunk ports to a VLAN. See page 803.
3. Make the VLAN VLAN-stacking capable.
Related Configuration Tasks
• Configuring the Protocol Type Value for the Outer VLAN Tag on page 804
• Dell Networking OS Options for Trunk Ports on page 804
• Debugging VLAN Stacking on page 805
• VLAN Stacking in Multi-vendor Networks on page 806
VLA
N
300
VL
A
N 100
I
N
T
E
R
N
E
T
S
E
R
V
I
C
E
P
R
O
V
I
D
E
R
R
R
D
D
E
E
w
/
V
L
A
N
S
T
A
C
K
I
N
G
V
L
A
N 2
00
VLA
N 1
0
0
V
L
AN
1
0
0
tagged 100
tagged 100
TPID
(0x8100)
PCP
CFI
(0)
VID
(VLAN Red)
TPID
(0x9100)
PCP
DEI
VID
(VLAN 300)
access port
trunk port