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Simple IP config won't ping

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  • 1.  Simple IP config won't ping

    Posted 03-11-2020 21:07

    Why doesn't the config of these 2 interfaces with IP addresses work? Thanks

     

    left-qfx5k       xe-0/0/44 (192.168.10.1)   <--------->     (192.168.10.1)  et-0/0/24:0        right-ptx1k

    root@left-qfx5k# show interfaces xe-0/0/44 | display set 
    set interfaces xe-0/0/44 unit 0 family inet address 192.168.10.1/32
    
    {master:0}[edit]
    
    root@left-qfx5k#
    
    root@left-qfx5k> show interfaces terse 
    Interface               Admin Link Proto    Local                 Remote
    .......
    xe-0/0/44               up    up
    xe-0/0/44.0             up    up   inet     192.168.10.1        --> 0/0
    
    -------------------------------------
    root@right-ptx1k# show interfaces et-0/0/24:0 | display set
    set interfaces et-0/0/24:0 unit 0 family inet address 192.168.10.2/32
    
    [edit]
    root@right-ptx1k# run show interfaces terse 
    Interface               Admin Link Proto    Local                 Remote
    et-0/0/24:0.0           up    up   inet     192.168.10.2        --> 0/0
                                       inet6    fe80::f6a7:39ff:febe:e8b3/64
                                       mpls    
                                       multiservice
    et-0/0/24:1             up    up
    et-0/0/24:2             up    up
    et-0/0/24:3             up    up

     



  • 2.  RE: Simple IP config won't ping
    Best Answer

    Posted 03-11-2020 21:14

    Change /32 subnet to /30 on both sides..

     



  • 3.  RE: Simple IP config won't ping

    Posted 03-11-2020 21:40
    Why doesn't Junos allow host address on its interface? Thanks


  • 4.  RE: Simple IP config won't ping

     
    Posted 03-11-2020 21:52


    This is because the /32 subnet only allows a single IPv4 address and all traffic will go directly between the device with that address and the default gateway (If any) from a host perspective. The device would not be able to communicate with other devices on the network since he is basically alone and there is no gateway.

     

    For p2p links use /30 or /31 but never 32 

     

    If this solves your problem, please mark this post as "Accepted Solution" so we can help others too \:)/

    Regards,

    Lil Dexx
    JNCIE-ENT#863, 3X JNCIP-[SP-ENT-DC], 4X JNCIA [cloud-DevOps-Junos-Design], Champions Ingenius, SSYB