Describe Equal Cost Multi-Pathing SONIC-DEPLOY Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   What is a common issue with ECMP load balancing when there are few large flows?

   • AThe routing protocol will withdraw the equal-cost routes
   • BThe hash may map all flows to the same path, causing uneven utilization
   • CThe router will automatically switch to per-packet load balancing
   • DThe router will drop packets that cannot be hashed
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   What is the main advantage of using a hash-based path selection in ECMP?

   • AIt ensures that packets belonging to the same flow are forwarded on the same path
   • BIt simplifies the routing table by removing duplicate routes
   • CIt allows the router to select the path with the lowest latency in real time
   • DIt guarantees that all paths are used equally regardless of traffic patterns
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4. 3foundation · easy

   If 'show ip route' shows only one next hop for a destination that should have multiple ECMP paths, what is a likely cause?

   • AThe ECMP max-paths is set to 1
   • BThe switch is using static routes only
   • CThe routing protocol is not running
   • DThe destination is not reachable
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5. 4foundation · medium

   A network engineer is configuring ECMP on a Dell SONiC switch. Which set of steps correctly enables ECMP on the switch?

   • AConfigure multiple static routes to the same destination with different next-hop addresses, then verify the routes are installed in the routing table.
   • BCreate a route-map that matches multiple next hops, then apply it to the routing protocol to enable ECMP.
   • CConfigure the same next-hop IP address on multiple interfaces, then enable the 'ecmp' feature in the 'config' mode.
   • DEnable ECMP globally using the 'ip ecmp' command, then configure a single next-hop address for each destination prefix.
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6. 5application · medium

   A network team is designing a new leaf-spine fabric with Dell SONiC switches. They want to ensure that traffic from a single server to multiple destinations is spread across multiple uplinks. The server generates many flows to different destination servers. What is the primary factor that determines how well the traffic is distributed?

   • AThe number of ECMP paths configured in the routing table
   • BThe routing protocol used (OSPF vs BGP)
   • CThe number of flows and the entropy of the hash inputs
   • DThe bandwidth of the uplinks
   Reveal Solution Discussion Select an answer first