What step can be done to troubleshoot the issue?

Refer to the exhibit.

CE1 and CE2 cannot communicate through the service provider BGP peering is established between PE1 and PE2. IS-IS is the only routing protocol running in the service provider core .

What step can be done to troubleshoot the issue?
A . Switch the IGPs running in the core from IS-IS to OSPF to support a Cisco MPLS TE tunnel from PE1 to PE2.
B . Configure BGP between CE and PE routers.
C . Confirm that IS-IS is running with metric-style narrow.
D . Verify the MPLS LSPs.

View Answer

Answer: D