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LAG Configuration on Alcatel-Lucent Devices

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 Devices

The term for Link Aggreagtion 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.

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 Link Aggregation, will be helpfull for you.Keep on ipcisco.com.

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)

You can Reach Our "CCNA Lab Courses with Packet Tracer" on Udemy.!!!
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About the Author
Gokhan Kosem is a telecommunation and network engineer. His ambition to IP networks and end-to-end system installation made him to prepare this web-site. By sharing his experiences about various networking protocols beside different system installation experiences and Cisco, Juniper, Alcatel-Lucent devices configurations, he is aimed to be helpful for his collegues in all over the world. He is currently lives in Istanbul, Turkey.

5 comments for “Link Aggregation – Part 4 (LAG Configuration on Alcatel-Lucent Devices)”

1
ibrahim

Hi Gokhan,
I am currently working for an ISP company , we have Alcatel ESS1, ESS7 and SR12 on our core/backbone network.
I would like to learn more about VPLS/MPLS, Epipe, SDP LDP and so on, getting good info on these topics in relation to ALU on the internet is extremely difficult, I have NSR1 and 2 books, but they are very dry and do not cover the area that I would have liked them to cover, they are very generic Internet books
Do you offer trainings on Alcatel and Juniper, thanks for the info on your website, I have already leant something from it.
Ibrahim Jama

November 29th, 2012 at 01:37
2
gokhankosem

Hi ibrahim, thank you very much for checking my website. I offer you Alcatel-Lucent more because as you know Alcatel-Lucent is became the second vendor in the IP market. Maybe you have heard about Alcatel-Lucent’s last 7950 XRS, it is fantastic and the number one for now in core routers area. Nowadays I am planning to make a group on facebook and maybe we can communicate there. Is this a real mail address?

November 30th, 2012 at 09:56
3
ibrahim

Hi Gokhankosem
Thanks for your prompt reply.
Yes, ALU is becoming very popular,Its downside is its lack of information on the internet, are there any simulation softwares for ALU, this i feel is where ALU is lagging behind Cisco, because no one in their right mind would want to practise on a live platform.
I would like to join your facebook group, and yes that is my actual email address.
Thanks again for putting together this website which i hope will evolve with a lot of contributors as more people with a similar mind set join in

December 4th, 2012 at 19:50
4
francis

Hi Gokhanksen
I would like to join your facebook. Are you still using. Because now i working at ALU and i want learn more about ALU.

Thanks any way.

March 31st, 2015 at 10:32
5
kwame

I have 2 stm-16 port on my router.
I want to aggregate these port and use as a sap under a vprn service. how can I go about this

February 3rd, 2017 at 04:39

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