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Query: Traffic disruption due to deletion of a port of Virtual Chassis of two EX4300.

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  • 1.  Query: Traffic disruption due to deletion of a port of Virtual Chassis of two EX4300.

    Posted 12-04-2019 05:55

    Hi,

     

    I'd like to know if service interruption or traffic disruption will take place for other ports except the deleted ports from a Virtual Chassis of two EX4300.

    Example: Deleting one Virtual Chassis Port of a Virtual Chassis Configuration for two switches (EX4300) using two VCPs (40Gig QSFP+) and two Uplinks (10Gig SFP+).

     

    > show virtual-chassis vc-port all-members
    fpc0:
    --------------------------------------------------------------------------
    Interface Type Trunk Status Speed Neighbor
    or ID (mbps) ID Interface
    PIC / Port
    1/0 Configured 5 Up 40000 1 vcp-255/1/0
    1/1 Configured 5 Up 40000 1 vcp-255/1/1
    2/0 Auto-Configured -1 Down 10000
    2/1 Auto-Configured -1 Down 10000
    2/2 Auto-Configured -1 Down 10000
    1/3 Configured Absent
    1/2 Configured Absent

    fpc1:
    --------------------------------------------------------------------------
    Interface Type Trunk Status Speed Neighbor
    or ID (mbps) ID Interface
    PIC / Port
    1/0 Configured 5 Up 40000 0 vcp-255/1/0
    1/1 Configured 5 Up 40000 0 vcp-255/1/1
    2/0 Auto-Configured -1 Down 10000
    2/1 Auto-Configured -1 Down 10000
    2/2 Auto-Configured -1 Down 10000
    1/3 Configured Absent
    1/2 Configured Absent


    To free ports xe-0/2/0 and xe-1/2/0; I'd like to do the following:
    > request virtual-chassis vc-port delete fpc-slot 0 pic-slot 2 port 0
    > request virtual-chassis vc-port delete fpc-slot 1 pic-slot 2 port 0

     


    Reference Page:https://www.juniper.net/documentation/en_US/junos/topics/task/configuration/virtual-chassis-mx-series-vc-ports-deleting.html

     

     

    Response will be highly appreciated.

     

    Regards,

     

    Zahid H.



  • 2.  RE: Query: Traffic disruption due to deletion of a port of Virtual Chassis of two EX4300.
    Best Answer

     
    Posted 12-04-2019 11:27

    Hi Zahid,

     

     As per your outputs those two ports are auto configured but currently in Down state. Removing those ports should not impact the VC services as there is no traffic passing through those links.  Running the commands should only take few seconds and not affect CPU either.

     

    Regards!

     

    Please mark as solved if it clarified your concern.

     

     



  • 3.  RE: Query: Traffic disruption due to deletion of a port of Virtual Chassis of two EX4300.

    Posted 12-05-2019 01:17

    Hi egarro,

     

    Thank you for your response. It helped my confidence.

    >request virtual-chassis vc-port delete fpc-slot 0 pic-slot 2 port 0
    error: command is not valid on the ex4300-48t


    Then, I tried the following format:
    > request virtual-chassis vc-port delete pic-slot 2 port 0
    Port deletion initiated, use cmd show virtual-chassis vc-port to verify


    And observed following, but not sure about other switch of the pair:
    > show interfaces terse |no-more |match "/2/"
    xe-1/2/0 up down
    xe-1/2/0.16386 up down
    xe-1/2/1 up down
    xe-1/2/1.0 up down aenet --> ae1.0
    xe-1/2/2 up down
    xe-1/2/3 up down
    xe-1/2/3.16386 up down


    Then, I tried the following format:
    > request virtual-chassis vc-port delete pic-slot 2 port 0 member 0
    fpc0:
    --------------------------------------------------------------------------
    Port deletion initiated, use cmd show virtual-chassis vc-port to verify


    And observed following, looks like the interfaces are back:
    > show interfaces terse |no-more |match "/2/"
    xe-0/2/0 up down
    xe-0/2/0.16386 up down
    xe-0/2/1 up down
    xe-0/2/1.16386 up down
    xe-0/2/2 up down
    xe-0/2/2.16386 up down
    xe-0/2/3 up down
    xe-0/2/3.16386 up down
    xe-1/2/0 up down
    xe-1/2/0.16386 up down
    xe-1/2/1 up down
    xe-1/2/1.0 up down aenet --> ae1.0
    xe-1/2/2 up down
    xe-1/2/3 up down
    xe-1/2/3.16386 up down

    I experienced a brief (e.g two minutes) interruption. Probable reason for the interruption: Two interfaces of the switches were connected to router have live similer IP netwok prepared for migration. This may have lead to IP conflict for the hosts. I'm not confident about the interruption. But I got the interfaces back.

     

    I'd like to know if 'commit' command is necessary to make this change permanent.

     

    I am accepting your response as solution considering your contribution.

     

    Thanks again.

     

    Zahid H.