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FAQ-What Is the Difference Between NextHop and RelyNextHop of Specific Entries of Routing

Publication Date:  2012-07-27 Views:  38 Downloads:  0
Issue Description
For NE5000E/NE80E/NE40E products, the display ip routing-table verbose command could help find the difference between NextHop and RelyNextHop. 
Alarm Information
Null
Handling Process
display ip routing-table verbose command outputs as follows: 
Destination: 0.0.0.0/0
     Protocol: BGP             Process ID: 0
   Preference: 100                   Cost: 0
      NextHop: 202.97.32.243    Interface: Pos2/0/0
  RelyNextHop: 222.83.17.5      Neighbour: 202.97.32.243
    Tunnel ID: 0x0                  Label: NULL           
        State: Active Adv Derived     Age: 00h44m09s
          Tag: 0              
NextHop represents for the next hop of routing table, and RelyNextHop for the actual next hop in FIB. 
The routing table and FIB are different entities, with different functions. Route is for upper layer, and the output by Display ip routing command is the next hop in route adding, which is called the original next hop in routing table, although it may be not reachable. Route management module finds the direct next hop through iteration for the original next hop of the route, and adds it into FIB for forwarding. The original next hop is related to the iteration next hop. 
Root Cause
Null
Suggestions
Null

END