Configuring LAG Virtual Interface

A LAG virtual interface allows you to enter the LAG virtual interface mode or multi-LAG virtual interface mode. To configure a LAG virtual interface, enter the following commands. All commands applicable on the physical port are available in the LAG virtual interface mode and the same applies for multi-LAG virtual interface commands as well.
  1. Enter the global configuration mode. 
    device# configure terminal
  2. Create a LAG. You can configure any of the following LAG types: static LAG or dynamic LAG. 
    device(config)# lag blue dynamic id 11
  3. Add ports to the LAG. 
    device(config-lag-blue)# ports ethernet 1/3/1 ethernet 1/3/2
device(config-lag-blue)# exit
device(config)#

    Upon the addition of the first physical port to a LAG, a LAG virtual interface is created and is available for manual configuration.

  4. Configure a LAG virtual interface which allows you to enter the LAG virtual interface mode or multi-LAG virtual interface mode. 
    device(config)# interface lag 11
device(config-lag-if-lg11)#
    The following example shows multi-LAG virtual interface configuration. 
    device(config)# interface lag 1 lag 5 lag 2
device(config-lag-mif-lg1-lg2,lg5)#
    You can configure the properties of the LAG on the LAG virtual interface and the changes made to the LAG virtual interface are propagated to all ports in the LAG.
    The following configuration options are supported under LAG virtual interface. 
    device(config-lag-if-lg11)# logging enable
device(config-lag-if-lg11)# acl-mirror-port ethernet 3/1/1
device(config-lag-if-lg11)# authentication
device(config-lag-if-lg11)# arp inspection trust
device(config-lag-if-lg11)# bandwidth 10000
device(config-lag-if-lg11)# broadcast limit 1000 kbps
device(config-lag-if-lg11)# dhcp snooping trust
device(config-lag-if-lg11)# dhcp6 snooping trust
device(config-lag-if-lg11)# dot1x port-control auto
device(config-lag-if-lg11)# ethernet loopback
device(config-lag-if-lg11)# ipv6-neighbor inspection trust     
device(config-lag-if-lg11)# loop-detection
device(config-lag-if-lg11)# mac access-group 1
device(config-lag-if-lg11)# mac-learn-disable
device(config-lag-if-lg11)# mac-authentication auth-filter 1
device(config-lag-if-lg11)# max-vlan 16
device(config-lag-if-lg11)# monitor both
device(config-lag-if-lg11)# multicast limit 1000 kbps log
device(config-lag-if-lg11)# openflow enable
device(config-lag-if-lg11)# packet-inerror-detect 1000
device(config-lag-if-lg11)# port-name abc
device(config-lag-if-lg11)# protected-port
device(config-lag-if-lg11)# pvst-mode 
device(config-lag-if-lg11)# pvstplus-protect
device(config-lag-if-lg11)# restart-vsrp-port 10
device(config-lag-if-lg11)# route-only
device(config-lag-if-lg11)# source-guard enable
device(config-lag-if-lg11)# spanning-tree
device(config-lag-if-lg11)# spanning-tree 802-1w admin-pt2pt-mac
device(config-lag-if-lg11)# spanning-tree 802-1w admin-edge-port
device(config-lag-if-lg11)# spanning-tree root-protect
device(config-lag-if-lg11)# spanning-tree designated-protect
device(config-lag-if-lg11)# speed-duplex
device(config-lag-if-lg11)# stp-bpdu-guard
device(config-lag-if-lg11)# stp-protect
device(config-lag-if-lg11)# tag-profile enable
device(config-lag-if-lg11)# trust dscp
device(config-lag-if-lg11)# unknown-unicast limit 1000 kbps
device(config-lag-if-lg11)# vlan-config add all-tagged
Parent topic: Configuring a LAG