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  • 1.  Route forwarding-table

    Posted 09-17-2023 13:43

    Can someone please explain why I am getting below 2 different output for 2 different subnet from the show route forwarding-table.

    Please explain as I am new to junos..

    User@EX4650-48Y> show route forwarding-table destination 10.11.190.0/24    

    Routing table: default.inet

    Internet:

    Enabled protocols: Bridging, 

    Destination Type RtRef Next hop Type Index NhRef Netif

    default user 0 f4:bf:a8:e0:b9:41 ucst 2057 311 ae0.0

    default perm 0 rjct 51 9

    10.11.190.0/25 user 0 172.31.1.163 ucst 2079 5167 ae8.0

    -----------------------------------------------

    User@EX4650-48Y> show route forwarding-table destination 10.11.189.0/24    

    Routing table: default.inet

    Internet:

    Enabled protocols: Bridging, 

    Destination Type RtRef Next hop Type Index NhRef Netif

    10.11.189.0/24 user 0 172.31.1.163 ucst 2079 5167 ae8.0

    Routing table: __master.anon__.inet

    Internet:

    Enabled protocols: Bridging, Dual VLAN, 

    Destination Type RtRef Next hop Type Index NhRef Netif

    default perm 0 rjct 1826 1



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    SOUMEN GHOSH
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  • 2.  RE: Route forwarding-table

    Posted 09-17-2023 15:58

    could you please provide the output of 

    show configuration routing-options | display set 



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    Jibu Thomas
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  • 3.  RE: Route forwarding-table

    Posted 09-17-2023 20:59

    There's no route for 10.11.190.0/24. There's one route for 10.11.190.0/25, but for 10.11.190.0/24 the EX has to fall back to the default route (toward something on interface ae0.0 with MAC address f4:bf:a8:e0:b9:41).

    For 10.11.189.0/24  there is specific route toward 172.31.1.163 via ae8.0.

    A show route yourprefix (without forwarding-table) would be far more useful and understandable actually.



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    Olivier Benghozi
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  • 4.  RE: Route forwarding-table
    Best Answer

    Posted 09-18-2023 02:42

    As there is no match for the prefix 10.11.190.0/24, the forwarding table for this prefix shows two routes - a) for /25 for which there seems to be a route via the ae8.0 interfaces; b) for all the 10.11.190.0/24 destinations outside the /25 prefix, it points to a default route via the ae0.0 interfaces.

    For 10.11.189.0/24 as there is an exact match for this prefix, only one egress path via ae8.0 is shown.

    Can you please share the outputs of 

    • show route 10.11.189.0/24
    • show route 10.11.190.0/24 exact
    • show route 10.11.190.0/25
    • show route 0.0.0.0/0 exact

    Regards



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    Sheetanshu Shekhar
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