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300-415 · Question #417

Refer to the exhibit. vEdge103 is connected to the headquarters using two different circuits: MPLS and Business Internet. Service VPN 100 must use only the MPLS circuit and drop the traffic when the…

The correct answer is A. Strict. To ensure Service VPN 100 exclusively uses the MPLS circuit and drops traffic upon its failure, the TLOC action must be configured as 'Strict'.

Policies

Question

Refer to the exhibit. vEdge103 is connected to the headquarters using two different circuits: MPLS and Business Internet. Service VPN 100 must use only the MPLS circuit and drop the traffic when the MPLS circuit fails. Which TLOC action must be selected to enable this outcome?

Options

  • AStrict
  • BEqual Cost Multipath
  • CPrimary
  • DBackup

How the community answered

(19 responses)
  • A
    89% (17)
  • C
    5% (1)
  • D
    5% (1)

Why each option

To ensure Service VPN 100 exclusively uses the MPLS circuit and drops traffic upon its failure, the TLOC action must be configured as 'Strict'.

AStrictCorrect

A TLOC action of 'Strict' in Cisco Catalyst SD-WAN mandates that traffic designated for a specific transport, such as MPLS for Service VPN 100, must use only that transport. If the designated transport link becomes unreachable or fails, any traffic attempting to use it will be dropped, preventing failover to other available circuits like Business Internet.

BEqual Cost Multipath

Equal Cost Multipath (ECMP) distributes traffic across multiple equal-cost paths, which is contrary to the requirement of using only one specific circuit.

CPrimary

'Primary' typically designates a preferred path but usually allows for failover to a 'Backup' path if the primary fails, which doesn't meet the 'drop traffic' requirement.

DBackup

'Backup' designates a path to be used only when a 'Primary' path fails, which is the opposite of the requirement to exclusively use one circuit and drop traffic upon its failure.

Concept tested: Cisco SD-WAN TLOC policy actions

Source: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/sdwan-xe-gs-book/sdwan-xe-gs-book_chapter_01000.html#concept_96A39794E7A54BB387E8E478148E08AF

Topics

#SD-WAN TLOC#VPN Policy#Path Selection#Failover

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