A network administrator intends to configure a floating static route on Router R1 to serve as a backup to a primary route dynamically learned via OSPF (Administrative Distance 110) for destination network . However, while the primary OSPF link remains healthy and operational, the administrator observes that the newly added static route immediately overrides the OSPF route in the IPv4 routing table. Which command did the administrator incorrectly execute on Router R1?
- ip route 172.16.50.0 255.255.255.0 192.168.1.2 90Cevap
- Bip route 172.16.50.0 255.255.255.0 192.168.1.2 120
- Cip route 172.16.50.0 255.255.255.0 192.168.1.2 110
- Dip route 172.16.50.0 0.0.0.255 192.168.1.2 120
Cevap
The command 'ip route 172.16.50.0 255.255.255.0 192.168.1.2 90' was incorrectly configured because assigning an Administrative Distance lower than 110 causes the static route to immediately preempt the primary OSPF path.
In Cisco IOS, static routes have a default Administrative Distance (AD) of 1. A floating static route acts as a backup path and must be configured with an AD higher than the primary route's protocol AD. Because OSPF has a default AD of 110, setting the static route's AD to 90 gives it higher priority (lower AD number) than OSPF. Consequently, the router immediately installs the static route into the routing table and ignores the active OSPF route.
Adım Adım Çözüm
Anahtar Kavram
Floating Static Route Administrative Distance Selection