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Zorluk: KolayFloating Static Routes

An engineer wants to configure a floating static route on a Cisco router to serve as a backup for a primary route learned via OSPF (Administrative Distance 110). Which two statements correctly describe the requirements and operational behavior of this floating static route?

  1. The administrative distance assigned to the floating static route must be set higher than 110.Cevap
  2. The floating static route will remain inactive and out of the routing table as long as the primary OSPF route is active.Cevap
  3. C
    The administrative distance of the floating static route must be set lower than 110 to ensure backup capability.
  4. D
    The floating static route automatically balances traffic with the OSPF route when configured with the default distance of 1.

Cevap

The floating static route must be configured with an administrative distance greater than 110, and it will remain inactive in the routing table while the primary OSPF route is operational.
A floating static route functions as a backup and must be configured with an administrative distance higher than that of the active primary routing protocol (OSPF AD 110). Because Cisco routers select routes with lower administrative distance values for forwarding, the floating static route remains hidden from the routing table until the primary OSPF route fails.

Adım Adım Çözüm

1
Determine the administrative distance of the primary route.
OSPF has a default administrative distance of 110.
To create a floating static backup route, the configured administrative distance must be higher than that of the primary route.
2
Analyze router path selection logic.
The router selects the route with the lowest administrative distance for installation into the active routing table.
Because the static route's administrative distance is higher than 110, it stays out of the routing table until the primary OSPF route disappears.

Anahtar Kavram

Floating Static Route Administrative Distance Requirements
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