Link Aggregation (LAG) Configuration on Nokia Routers

In the previous article we focus on how to configure Link Aggregation on Cisco and Juniper devices. Here we will see how is this configuration done on Alcatel-Lucent devices. Alcatel-Lucent 7750 Service Router will be our device.

 

Link Aggregation Example Topology on Alcatel-Lucent SR 7750, JUNOS
 

Link Aggregation on (Alcatel-Lucent) Nokia Router
The term for Link Aggregation is LAG (Link Aggragation Group) in Alcatel-Lucnet.In Alcatel-Lucent routers also maximum 8 ports can be bundled in a LAG, and up to 64 LAG can be on a chassis.

 

The ports in a LAG must have the same characteristis, speed, duplex etc.

 


 

In this part, let’s start with the configuration of the ports. We have ports 1/1/1 and 1/1/2. We must ensure that these two ports have identical speed and duplex. Let’s starts with RouterA.

 

A : RouterA # configure port 1/1/1
A : RouterA >config>port# ethernet no autonegotiate
A : RouterA >config>port# ethernet speed 100
A : RouterA >config>port# ethernet duplex full
A : RouterA >config>port# exit
A : RouterA # configure port 1/1/2
A : RouterA >config>port# ethernet no autonegotiate
A : RouterA >config>port# ethernet speed 100
A : RouterA >config>port# ethernet duplex full

 

Above, the “no autonegotiation” command is used to ensure that autonegotiation is disabled and only a specific speed is advertised.

 

We must remove the port binding from the interface between RouterA and RouterB. To do this use the below command.

A : RouterA # configure router interface RouterAB no port

 


 

Next, we configure the LAG and associate the ports with this LAG.

[wcm_nonmember][sc name=”ContentRMessage”][/wcm_nonmember] [wcm_restrict plans=”gold, silver, blue”]

A : RouterA # configure lag 20
A : RouterA >config>lag# port 1/1/1
A : RouterA >config>lag# port 1/1/2
A : RouterA >config>lag# exit

 

And lastly, we can bind the LAG to the interface between RouterA and RouterB.

A : RouterA # configure router interface RouterAB
A : RouterA >config>if# lag 20

 


 

We will do the same configuration on the other end of the LAG.

B : RouterB # configure lag 20
B : RouterB >config>lag# port 1/1/1
B : RouterB >config>lag# port 1/1/2
B : RouterB >config>lag# exit

 

And lastly, we can bind the LAG to the interface between RouterA and RouterB.

B : RouterB # configure router interface RouterBA
B : RouterB >config>if# lag 20

 


 

After the configuration of LAG, you can check the Lag with the below comands:

A : RouterA # show lag
A : RouterA # show lag 20
A : RouterA # show lag 20 detail
A : RouterA # show lag 20 statistics

 

Below, the screenshot of these commands on Alcatel-Lucent Service Router are also given.

 

Link Aggregation on Alcatel-Lucent SR 7750
“Show lag” Command on ALU SR 7750
 

Link Aggregation on Alcatel-Lucent SR 7750
“Show lag 20” Command on ALU SR 7750
 

Link Aggregation on Alcatel-Lucent SR 7750
“Show lag 20 detail” Command on ALU SR 7750
I hope this article series, that show the configuration of the LAG, will be helpfull for you.Keep on ipcisco.com.

[/wcm_restrict]

Link Aggregation – Part 1 (Link Aggregation Control Protocol, LACP)
Link Aggregation – Part 2 (LACP Configuration on Cisco Devices)
Link Aggregation – Part 3 (LACP Configuration on Juniper Devices)
Link Aggregation – Part 4 (LAG Configuration on Alcatel-Lucent Devices)