Routes Shared Between Routing Protocols - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Routing Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
route is implemented. When the main route recovers, the router will restore it and
re-select a route. And, as the main route has the highest preference, the router will
choose the main route to send data. This process is the automatic switchover from the
backup route to the main 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 S3900 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
details, see section 3.4.2 VII. "Configuring RIP to import routes" and section 4.6.7
"Configuring OSPF to Import External Routes".
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Chapter 1 IP Routing Protocol Overview