📖 What is Next-Hop IP Address?
The IP address of the adjacent router interface to which a packet is forwarded.
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Sensei Says:
"When configuring a static route using a next-hop IP, the router must perform a recursive lookup to find the exit interface, unless CEF (Cisco Express Forwarding) optimizes it."
📚 Certification: Certified Network Associate (200-301)
🔑 What are the Key Concepts of Next-Hop IP Address?
- ▸ Recursive routing lookups
- ▸ Adjacent router IP
- ▸ Point-to-point and broadcast networks
🎯 How does Next-Hop IP Address appear on the 200-301 Exam?
Identifying why a route with a next-hop IP is failing if the next-hop IP itself is unreachable.
Configuring static routes effectively on a broadcast network without causing ARP overhead.
❓ Frequently Asked Questions
What is a recursive lookup?
It's when the router has to look up the next-hop IP in the routing table to find the actual exit interface to forward the packet.
Why use next-hop IP instead of exit interface on Ethernet?
Using an exit interface on Ethernet forces the router to ARP for every destination, causing overhead. Next-hop avoids this.
Related Terms from Certified Network Associate
Threat
Designated Port
Internet Protocol version 4 (IPv4) Address
REST (Representational State Transfer)
SDN Controller
Designated Router (DR)