How will a router handle static routing differently if Cisco Express Forwarding is disabled?
- It will not perform recursive lookups.
- Ethernet multiaccess interfaces will require fully specified static routes to avoid routing inconsistencies.
- Static routes that use an exit interface will be unnecessary.
- Serial point-to-point interfaces will require fully specified static routes to avoid routing inconsistencies.
Explanation: Routing and Switching Essentials
2.2.1 Configure IPv4 Static Routes
In most platforms running IOS 12.0 or later, Cisco Express Forwarding is enabled by default. Cisco Express Forwarding eliminates the need for the recursive lookup. If Cisco Express Forwarding is disabled, multiaccess network interfaces require fully specified static routes in order to avoid inconsistencies in their routing tables. Point-to-point interfaces do not have this problem, because multiple end points are not present. With or without Cisco Express Forwarding enabled, using an exit interface when configuring a static route is a viable option.
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