Reference Guide

818 | Service Provider Bridging
www.dell.com | support.dell.com
Figure 41-1. 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 Force10 cautions against using the same MAC address on different customer VLANs, on the
same VLAN-Stack VLAN.
• You can ping across a trunk port only if both systems on the link are an E-Series. You cannot ping
across the link if one or both of the systems is a C-Series or S-Series.
• This limitation becomes relevant if you enable the port as a multi-purpose port (carrying single-tagged
and double-tagged traffic).
Configure VLAN Stacking
Configuring VLAN-Stacking is a three-step process:
1. Create access and trunk ports. See page 819.
2. Assign access and trunk ports to a VLAN. See page 819.
3. Make the VLAN VLAN-stacking capable.
Related Configuration Tasks
• Configure the Protocol Type Value for the Outer VLAN Tag on page 820
• FTOS Options for Trunk Ports on page 820
• Debug VLAN Stacking on page 821
• VLAN Stacking in Multi-vendor Networks on page 822
VLAN
300
VLAN100
I
N
T
E
R
N
E
T
S
E
R
V
R
R
I
C
E
P
R
O
V
I
D
E
R
w
R
/
V
L
A
N
S
T
A
T
T
C
K
I
N
G
VL
AN
200
VLAN
1
0
0
VLAN 100
V
L
A
N
1
00
tagged 100
tagged 100
TPID
(0x8100)
PCP
CFI
(0)
VID
(VLAN Red)
TPID
(0x9100)
PCP
DEI
VID
(VLAN 300)
access port
trunk port