8-7
Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 8 Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling
Layer 2 Protocol Tunneling Configuration Guidelines
Layer 2 Protocol Tunneling Configuration Guidelines
This section provides the guidelines for configuring protocol tunneling in your network:
•
The protocol tunneling functions independently from 802.1Q tunneling.
•
For performance reasons, we do not recommend that you configure Layer 2 protocol tunneling in
systems with a Supervisor Engine 1.
•
You can enable Layer 2 protocol tunneling on access ports, trunk ports, or 802.1Q tunneling ports.
•
Layer 2 protocol tunneling is not supported with private VLANs.
•
Layer 2 protocol tunneling is not supported with dynamic VLANs.
•
If you are running MST and connecting to an ISP network using EtherChannels, you must set the
link type to
shared
on all the channeling ports by using the
set spantree link-type
mod/port
shared
command. This command prevents the EtherChannels from going into the errdisable state because
of channel misconfiguration.
•
With a PFC3A, you can enter the
set rate-limit l2protocol-tunnel
commands to enable, disable, or
set rate limiting for the Layer 2 protocol tunnel-encapsulated PDUs globally on the switch. For
detailed information on configuring rate limiting, see the
“Configuring Layer 2 PDU Rate Limiting
on the Switch” section on page 7-61
.
Configuring Layer 2 Protocol Tunneling on the Switch
These sections describe the protocol tunneling configuration:
•
Specifying a Layer 2 Protocol, page 8-7
•
Configuring Layer 2 Protocol Tunneling on Trunk Ports, page 8-8
•
Layer 2 Protocol Tunneling on Trunks Example, page 8-9
•
Specifying Drop and Shutdown Thresholds on Layer 2 Protocol Tunneling Ports, page 8-10
•
Specifying CoS on Layer 2 Protocol Tunneling Ports, page 8-12
•
Clearing Layer 2 Protocol Tunneling Statistics, page 8-13
Specifying a Layer 2 Protocol
To specify a Layer 2 protocol on a port or range of ports, perform this task in privileged mode:
Task
Command
Step 1
Specify a Layer 2 protocol on a port.
set port l2protocol-tunnel
mod/port
{
cdp
|
eoam
|
stp
|
vtp
} {
enable
|
disable
}
Step 2
Verify the configuration.
show l2protocol-tunnel statistics
[
mod
[
/port
]]
