Describe Equal Cost Multi-Pathing SONIC-DEPLOY Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A network engineer is verifying ECMP on a Dell SONiC switch. The switch has four equal-cost routes to a destination. The engineer wants to confirm that the switch is actually using all four paths for forwarding. Which command or method should they use?

   • ACheck the logs for ECMP-related messages
   • BUse 'ping' to the destination and observe which interface responds
   • CCheck the forwarding table (e.g., 'show hardware buffer' or 'show ip fib') for multiple next-hop entries
   • DRun 'show ip route' and count the number of next hops
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   How does a router using ECMP decide which next hop to use for a given packet?

   • AIt selects the next hop with the lowest IP address
   • BIt randomly picks a next hop for each packet
   • CIt forwards the packet out all equal-cost next hops simultaneously
   • DIt uses a hash of packet header fields to map the flow to one of the equal-cost next hops
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which show command displays the ECMP next hops for a specific destination in Dell SONiC?

   • Ashow running-config | include ecmp
   • Bshow interfaces status
   • Cshow ecmp <destination>
   • Dshow ip route <destination>
   Reveal Solution Discussion Select an answer first
5. 9foundation · easy

   Which packet header fields are commonly used as inputs to the ECMP hash for IP traffic?

   • ASource and destination IP addresses and TCP/UDP port numbers
   • BTTL and IP protocol field
   • CSource and destination MAC addresses
   • DInterface index and VLAN ID
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the primary purpose of Equal Cost Multi-Pathing (ECMP) in a routed network?

   • ATo provide redundancy by failing over to a backup path only when the primary path fails
   • BTo select a single best path based on the lowest administrative distance
   • CTo distribute traffic across multiple paths that have the same routing metric
   • DTo reduce routing table size by summarizing multiple prefixes into one
   Reveal Solution Discussion Select an answer first