Refer to the exhibit. A network operator must inject a Level 1 route from XR2 (10.16.16.0/24) into the ISIS topology. Which configuration allows the injection in a way that XR3 and XR1 have a valid an

Question

Exhibit

Options

• A#XR3 route-policy ISIS_PROPO if destination in(10.0.0.0/8 ge 8 le 22) then pass endif end-policy ! router isis 1 net 49.1921.6800.0003.00 address-family ipv4 unicast ! propagate level 1 into level 2 route-policy ISIS_PROPO
• B#XR2 route-policy ISIS_PROPO if destination in(10.0.0.0/8 ge 8 le 32) then pass endif end-policy ! router isis 1 net 49.1921.6800.0003.00 address-family ipv4 unicast ! propagate level 2 into level 1 route-policy ISIS_PROPO
• C#XR2 route-policy ISIS_PROPO if destination in(10.0.0.0/8 ge 8 le 32) then pass endif end-policy ! router isis 1 net 49.1921.6800.0003.00 address-family ipv4 unicast ! propagate level 1 into level 2 route-policy ISIS_PROPO
• D#XR3 route-policy ISIS_PROPO if destination in(10.0.0.0/8 ge 8 le 32) then pass endif end-policy ! router isis 1 net 49.1921.6800.0003.00 address-family ipv4 unicast ! propagate level 2 into level 1 route-policy ISIS_PROPO

• A
  14% (3)
• B
  5% (1)
• C
  5% (1)
• D
  76% (16)

Explanation

L1 route injected by XR2 won't be advertised to XR1, since L2 routes are NOT leaked to L1 by default. An [L2-L1] route leak policy should be configured on L1/L2 router (XR3).

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