Specifications

Access Layer April 2014
36
Option 2: Congure EtherChannel to WAN router
If your access layer switch is a single fixed configuration switch connecting to a single remote-site router without
using EtherChannel, you can skip Step 1.
Step 1: Configure EtherChannel member interfaces.
When connecting to a network infrastructure device that does not support LACP, like a router, set the channel-
group mode to be forced on.
Also, apply the egress QoS macro that was defined in the platform configuration procedure to ensure traffic is
prioritized appropriately.
Cisco Catalyst 2960S and 2960-X do not require the switchport command, and the Cisco Catalyst 4500 does
not use the logging event bundle-status command.
interface [interface type] [port 1]
description Link to Router Port 1
interface [interface type] [port 2]
description Link to Router Port 2
!
interface range [interface type] [port 1], [interface type] [port 2]
switchport
macro apply EgressQoS
channel-group [number] mode on
logging event link-status
logging event trunk-status
logging event bundle-status
Step 2: Configure the VLAN trunk interface to the upstream device.
An 802.1Q trunk is used for the connection to this upstream device, which allows the router to provide Layer 3
services to all the VLANs defined on the access layer switch. Prune the VLANs allowed on the trunk to only the
VLANs that are active on the access switch. Set DHCP snooping and ARP Inspection to trust.
When using EtherChannel, the interface type is port-channel, and the number must match channel-group
configured in Step 1 in Option 2: Configure EhterChannel to WAN Router of this procedure. For deployments
other than EtherChannel, interface type is one appropriate for your deployment.
The Cisco Catalyst Series Switch 3750 requires the switchport trunk encapsulation dot1q command.
interface [interface type] [number]
description EtherChannel Link to Router
switchport trunk allowed vlan [data vlan],[voice vlan]
switchport mode trunk
ip arp inspection trust
ip dhcp snooping trust
spanning-tree portfast trunk
logging event link-status
logging event trunk-status
no shutdown
If the interface type is not a port-channel, you must configure additional commands switchport and macro apply
EgressQoS on the interface.