This article identifies default hash key consideration for load balancing mechanism.

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To identify default hash key algorithm in the FPC, below shell commands can be checked to confirm it.

SMPC3(jtac-mx480-r2049-re0 vty)# show jnh lb

Unilist Seed Configured 0x76a39fef System Mac address d0:07:ca:d1:4a:80

Hash Key Configuration: 0x000180f200e00000

      IIF-V4: No

     SPORT-V4: Yes >>>>>>>>>>>> This indicates source port has been considered for hashing algorithm for load balancing

     DPORT-V4: Yes

       TOS: No

   GTP-TEID-V4: No

 L2TP-TUNNEL-SESSION-ID: No

   GRE-PAYLOAD: Yes

      IIF-V6: No

     SPORT-V6: Yes

     DPORT-V6: Yes

  TRAFFIC_CLASS: No

   GTP-TEID-V6: No

  FLOW-LABEL-V6: Yes

     IIF-MPLS: No

   MPLS_PAYLOAD: Yes

     ETHER_PW: Yes

     MPLS_EXP: No

    CW_PRESENT: No

   IIF-BRIDGED: No

  MAC ADDRESSES: Yes

  ETHER_PAYLOAD: Yes

   802.1P OUTER: No

Services Hash Key Configuration: 

     SADDR-V4: No

     DADDR-V4: No

      IIF-V4: No

     SADDR-V6: No

     DADDR-V6: No

      IIF-V6: No

  SRC-PREFIX-LEN: 127