Reference Guide

1392 | Service Provider Bridging
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• The default behavior is to disable protocol packet tunneling through the 802.1q
tunnel.
• Rate-limiting is required to protect against BPDU attacks.
• A port channel (including through LACP) can be configured as a VLAN-Stack
access or trunk port.
• ARP packets work as expected across the tunnel.
• FEFD works the same as with Layer 2 links.
• Protocols that use Multicast MAC addresses (OSPF for example) work as
expected and carry over to the other end of the VLAN-Stack VLAN.
debug protocol-tunnel
c e s
Enable debugging to ensure incoming packets are received and rewritten to a new
MAC address.
Syntax
debug protocol-tunnel interface {in | out | both} [vlan vlan-id] [count value]
To disable debugging, use the
no debug protocol-tunnel interface {in | out | both} [vlan
vlan-id] [count value] command.
Parameters
Defaults
Debug Disabled
Command Modes
EXEC Privilege
interface
Enter one of the following interfaces and slot/port information:
• For a Fast Ethernet interface, enter the keyword
FastEthernet followed
by the slot/port information.
• For a 1-Gigabit Ethernet interface, enter the keyword
GigabitEthernet
followed by the slot/port information.
• For a Port Channel interface, enter the keyword
port-channel followed
by a number:
C-Series and S-Series Range: 1 to 128
E-Series Range: 1 to 32 for EtherScale, 1 to 255 for TeraScale and 1 to
512 for ExaScale.
• For a SONET interface, enter the keyword
sonet followed by the slot/
port information.
• For a 10-Gigabit Ethernet interface, enter the keyword
TenGigabitEthernet followed by the slot/port information.
• For a 40-Gigabit Ethernet interface, enter the keyword
fortyGigE
followed by the slot/port information.
in | out | both
Enter the keyword in, out, or both to debug incoming interfaces, outgoing
interfaces, or both incoming and outgoing interfaces.
vlan vlan-id Enter the keyword vlan followed by the VLAN ID.
Range: 1 to 4094
count value
Enter the keyword count followed by the number of debug outputs.
Range: 1 to 100