Cisco Catalyst 4500 Series - Configuring Layer 2 Tunneling for Etherchannels

30-19
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 30 Configuring 802.1Q Tunneling, VLAN Mapping, and Layer 2 Protocol Tunneling
Configuring Layer 2 Protocol Tunneling
Drop Threshold for Encapsulated Packets: 0
Port Protocol Shutdown Drop Encaps Decaps Drop
Threshold Threshold Counter Counter Counter
------------------- ----------- --------- --------- --------- --------- ---------
Gi1/1/11 cdp 1500 1000 2288 2282 0
lldp 1500 1000 0 0 0
stp 1500 1000 116 13 0
vtp 1500 1000 3 67 0
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Configuring Layer 2 Tunneling for EtherChannels
To configure Layer 2 point-to-point tunneling to facilitate the automatic creation of EtherChannels, you
need to configure both the SP edge switch and the customer switch. This section includes the following
tasks:
• Configuring the SP Edge Switch, page 30-19
• Configuring the Customer Switch, page 30-21
Configuring the SP Edge Switch
Command Purpose
Step 1
Switch# configure terminal
Enters the global configuration mode.
Step 2
Switch(config)# interface
interface-id
Enters interface configuration mode. Enter the interface to be configured as
a tunnel port. This should be the edge port in the service provider network
that connects to the customer switch.
Step 3
Switch(config-if)# switchport
mode dot1q-tunnel
Configures the interface as an 802.1Q tunnel port
Step 4
Switch(config-if)#
l2protocol-tunnel point-to-point
[pagp | lacp | udld]
(Optional) Enables point-to-point protocol tunneling for the desired
protocol. If no keyword is entered, tunneling is enabled for all three
protocols.
Caution To avoid a network failure, make sure that the network is a
point-to-point topology before you enable tunneling for PAgP,
LACP, or UDLD packets.
Step 5
Switch(config-if)#
l2protocol-tunnel
shutdown-threshold
[point-to-point
[pagp | lacp | udld]] value
(Optional) Configures the threshold for packets-per-second accepted for
encapsulation. The interface is disabled if the configured threshold is
exceeded. If no protocol option is specified, the threshold applies to each of
the tunneled Layer 2 protocol types. The range is 1 to 4096. The default is
to have no threshold configured.
Note If you also set a drop threshold on this interface, the
shutdown-threshold value must be greater than or equal to the
drop-threshold value.