Reference Guide

908 | Service Provider Bridging
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Figure 49-11. VLAN Stacking with L2PT
Implementation Information
• L2PT is available for STP, RSTP, MSTP, and PVST+ BPDUs.
• No protocol packets are tunneled when VLAN Stacking is enabled.
• L2PT requires the default CAM profile.
Enable Layer 2 Protocol Tunneling
Step Task Command Syntax Command Mode
1 Verify that the system is running the default CAM profile;
you must use this CAM profile for L2PT.
show cam-profile EXEC Privilege
2 Enable protocol tunneling globally on the system. protocol-tunnel enable CONFIGURATION
3 Tunnel BPDUs the VLAN. protocol-tunnel stp INTERFACE
VLAN
I
N
T
E
R
N
E
T
S
E
R
V
R
I
C
E
P
R
O
V
I
D
E
R
w
/
ww
S
P
A
P
P
N
N
I
N
G
T
R
E
E
R1-E-Series
R2
Non-Force10
System
S
P
A
P
P
N
N
I
N
G
T
R
E
E
N
E
T
W
O
R
K
S
P
A
P
P
N
N
I
N
G
T
R
E
E
T
R
E
E
R3
Non-Force10
System
Building A
Building B
BPDU w/ destination
MAC address: 01-80-C2-00-00-00
BPDU w/ destination
MAC address: 01-01-e8-00-00-00
BPDU w/ destination
MAC address: 01-80-C2-00-00-00
no spanning-tree
no spanning-tree