Routes Shared Between Routing Protocols - H3C S7500 Series Operation Manual

Operation Manual – Routing Protocol
H3C S7500 Series Ethernet Switches
backup routes. Normally, the router sends data through the primary route. When line
failure occurs on the primary route, the primary route will hide itself and the router will
choose the one whose preference is the highest among the remaining backup routes
as the path to send data. In this way, the switchover from the primary route to a
backup route is implemented. When the primary route recovers, the router will restore
it and re-select a route. And, as the primary route has the highest preference, the
router will choose the primary route to send data. This process is the automatic
switchover from the backup route to the primary route.

1.2.3 Routes Shared Between Routing Protocols

As the algorithms of various routing protocols are different, different routing protocols
may discover different routes. This brings about the problem of how to share the
discovered routes between routing protocols. The S7500 series can import (with the
import-route command) the routes discovered by one routing protocol to another
routing protocol. Each protocol has its own route redistribution mechanism. For
detailed information, refer to the description of importing external routes in routing
protocol configuration of the following chapters
Chapter 1 IP Routing Protocol Overview
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