AVAYA ERS 2500 3500 4000 5000 8000 LACP with Cisco Catalyst Swictes (EthernChannel)

There will be a time when you will come across and will be asked to configure your Avaya Switch with Cisco Switch as LACP ( Link Aggregation Control Protocol) or Link redundency.
So in this post i’ll perform a small LAC or Exercise which will deffinatelly help you to understand the LACP configuration.
First let me explain to you what is LACP and why is it so useful in todays coorporate network topology.
LACP is an IEEE standard protocol. LACP bundles more than one physical link into a group or pipe to form as one single logical channel. LACP allows a network device to negotiate an automatic bundling of links by sending LACP packets to the peer (directly connected device that also implements LACP).

Lets start our configuration with AVAYA ERS SWITCH

AVAYA_ERS#configure terminal

Converting port 23,24 into Trunk or into Tagging port

AVAYA_ERS(config)#vlan ports 23,24 tag
AVAYA_ERS(config)#vlan ports 23,24 tagging tal
AVAYA_ERS(config)#vlan ports 23,24 tagging taga
AVAYA_ERS(config)#vlan ports 23,24 tagging tagall

At this moment i’m using VLAN 1 only to setup my LACP, but if incase you have more than one VLAN you can add the following command to add other vlans into LACP group

vlan member add VLANID (VLAN 1D) Port  (Port number / Port List)

we will activate LACP on Port 23,24 using LACP key which will automatically creal LAG

Interface fastethernet 23,24
lacp key 1
lacp mode active
lacp timeout-time short
lacp aggregation enable

Let see the output of show lacp

AVAYA_ERS(config)#show lacp port 23,24

show MLT

As you can see, still out MTL is not activated or enabled yet.

Lets move to Cisco Switch and configure LACP on port 23,24

INTERGRATION-IT#configure terminal

INTERGRATION-IT(config)#interface vlan 1
INTERGRATION-IT(config-if)#ip add
INTERGRATION-IT(config-if)#ip address

Lets configure Make 23,24 as turnk port

INTERGRATION-IT(config)#interface range fastEthernet 0/23 – 24
INTERGRATION-IT(config-if-range)#switchport trunk en
INTERGRATION-IT(config-if-range)#switchport trunk encapsulation dot
INTERGRATION-IT(config-if-range)#switchport trunk encapsulation dot1q
INTERGRATION-IT(config-if-range)#switchport mode trunk
INTERGRATION-IT(config-if-range)#channel-group 1 mo active
INTERGRATION-IT(config-if-range)#channel-protocol lacp

show lacp command and neighbour

Cisco Catalyst Swictes

Lets go back to AVAYA ERS switch and if we can find our MLT group is activated

Cisco Catalyst Swictes

As you can see above TRUNK 32 is Enabled Trunk

Here is a prove of my dual uplinks

Cisco Catalyst Swictes

If there is anything you like to share or add please commend below or share with your friends.