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Module 7 - Interface Configuration

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  • 1.  Module 7 - Interface Configuration

    Posted 09-25-2017 19:35

    I just finished Module 7 and boy, am I confused.

     

    What is a aggragate link for? Is it just to bond 2 links together to act as one?

     

    How do I configure a group and apply it to interfaces?



  • 2.  RE: Module 7 - Interface Configuration

    Posted 09-26-2017 00:19

    It's exactly that, aggregating two or more physical ports to create one logical one. It increases the bandwith of the link. It also provides redundancy without worrying about looping. If one of the physical ports goes down you will still have connectivity.

     

    There is only one STP instance for the logical port, not multiple STP instances for each port in the aggregate.

     

    As far as configuring in Juniper, I will let someone else address that as I am still learning Juniper myself.



  • 3.  RE: Module 7 - Interface Configuration

    Posted 09-26-2017 03:53

    I found this link describing the CLI procedures for configuring on Juniper. The protocol we are talking about is LACP (Link Aggregation Control Protocol)

     

    https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/link-aggregation-cli.html

     

    You basically create a logical interface "ae0", Add which physical interfaces are going to belong to that LAG (Link aggregation Group), and define some parameters.

     

    Once the LAG is setup you make all the configuations under that "ae" interface such as VLAN tagging, IP addresses, etc.



  • 4.  RE: Module 7 - Interface Configuration

    Posted 09-26-2017 10:22

    Thanks! That confirms what I thought about LAG and LACP.

     

    Now about groups...



  • 5.  RE: Module 7 - Interface Configuration
    Best Answer

    Posted 09-26-2017 12:23

    Hello Seeley4859 you're welcome. 

     

    Configuration groups allow you to define common settings once and apply them later. For example, a switch may have dozens of ports that all need to be configured as Layer 2 ports on the same VLAN. Instead of configuring the same thing dozens of times for each interface do it once in a configuation group and then apply the configuration group to the interfaces branch of the configuation. 

     

    https://www.juniper.net/documentation/en_US/junos/topics/concept/junos-software-configuration-groups-understanding.html

     

    Thanks again for using the forum. 

     

    Gordon

     



  • 6.  RE: Module 7 - Interface Configuration

    Posted 09-26-2017 23:21

    Thanks for the info on configuration groups. Thats a very interesting and useful feature I had no idea about.



  • 7.  RE: Module 7 - Interface Configuration

    Posted 09-27-2017 05:09

    Thanks for using the forum douglas.alexander. It makes it easy for everyone to help.

     

    Gordon



  • 8.  RE: Module 7 - Interface Configuration

    Posted 09-27-2017 18:07

    Very helpful as always, Gordon. Thanks again!



  • 9.  RE: Module 7 - Interface Configuration

    Posted 09-26-2017 07:03

    Hello douglas.alexander and Seeley4859.

     

    Great job sharing information. That link is spot on. Thanks for helping.

     

    Gordon