You are working in a large service provider NOC as a Tier 2 NOC engineer. A ticket has been
escalated to you regarding an intermittent and apparently random problem with packet loss. The
network has multiple redundant paths on which IP traffic can flow. The service desk has performed
standard troubleshooting procedures but cannot isolate the problem.
Which two types of information should you gather before escalating to Tier 3? (Choose two.)
A.
Contact the carrier that is providing the underlying circuits. Request the service desk of the
carrier to troubleshoot, because the problem must lie in the network of the carrier.
B.
Perform an extended ping with varying packet sizes to see if the problem is related to a path
MTU issue.
C.
Use traceroute and specify multiple source interfaces to see if one specific route is causing the
issue.
D.
Perform a switchover of the route processors of one of the core routers that traffic passes
through.
Explanation: