Cisco Catalyst 4500 Series - Configuring Multichassis Etherchannels

5-48
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 5 Configuring Virtual Switching Systems
Configuring a VSS
Configuring Multichassis EtherChannels
Configure multichassis EtherChannels (MECs) as you would for a regular EtherChannel. The VSS will
recognize that the EtherChannel is an MEC when ports from both switches are added to the
EtherChannel. You can verify the MEC configuration by entering the show etherchannel command.
One VSS supports a maximum of 256 port channels.
To configure Layer 3 Multichassis EtherChannels, create the port channel logical interface and then put
the Ethernet interfaces from both the VSS active and VSS standby into the port channel.
These sections describe Layer 3 EtherChannel configuration:
• Creating Port Channel Logical Interfaces, page 5-48
• Configuring Physical Interfaces as Layer 3 EtherChannels, page 5-49
Creating Port Channel Logical Interfaces
Note To move an IP address from a physical interface to an EtherChannel, you must delete the IP address from
the physical interface before configuring it on the port channel interface.
To create a port channel interface for a Layer 3 EtherChannel, perform this task:
This example shows how to create port channel interface 1:
Switch# configure terminal
Switch(config)# interface port-channel 1
Command Purpose
Switch(config)# switch virtual domain domain_id
Enters VSS configuration mode.
Switch(config-vs-domain)# mac-address use-virtual
Assigns the router MAC address from a reserved pool of
domain-based addresses.
Note This is the default.
This is shown in the configuration, even if it the default.
Switch(config-vs-domain)# mac-address mac-address
Assigns the router MAC address in three 2-byte
hexadecimal numbers.
Switch(config-vs-domain)# mac-address chassis
Specifies the router MAC address as the last address of
chassis MAC address range.
Command Purpose
Step 1
Switch(config)# interface port-channel
port_channel_number
Creates the port channel interface. The value for
port_channel_number can range from 1 to 64.
Step 2
Switch(config-if)# ip address ip_address mask
Assigns an IP address and subnet mask to the
EtherChannel.
Step 3
Switch(config-if)# end
Exits configuration mode.
Step 4
Switch# show running-config interface
port-channel port_channel_number
Verifies the configuration.