3com S7906E Guide De Référence

 

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all-processes: Redistributes routes from all the processes of the specified routing protocol. This 

keyword takes effect only when the protocol is rip, ospf, or isis.  

allow-ibgp: Allows  IBGP routes redistribution. It is optional only when the protocol is bgp. 

cost cost: Specifies a route cost, in the range 0 to 16777214. The default is 1. 

type type: Specifies a cost type, 1 or 2. The default is 2. 

tag tag : Specifies a tag for external LSAs. The default is 1. 

route-policy route-policy-name: Specifies a route policy to redistribute qualified routes only. A Route 

policy name is a string of up to 19 characters. 

Use the import-route command to redistribute routes from another protocol. 

Use the undo import-route command to disable route redistribution from a protocol. 

Route redistribution from another protocol is not configured by default. 

OSPF prioritize routes as follows: 

z 

Intra-area route 

z 

Inter-area route 

z 

Type1 External route 

z 

Type2 External route 

An intra-area route is a route in an OSPF area. An inter-area route is between any two OSPF areas. 

Both of them are internal routes. 

An external route is a route to a destination outside the OSPF AS. 

A Type-1 external route is an IGP route, such as RIP or STATIC, which has high reliability and whose 

cost is comparable with the cost of OSPF internal routes. Therefore, the cost from an OSPF router to a 

Type-1 external route’s destination equals the cost from the router to the corresponding ASBR plus the 

cost from the ASBR to the external route’s destination. 

A Type-2 external route is an EGP route, which has low credibility, so OSPF considers the cost from the 

ASBR to a Type-2 external route is much bigger than the cost from the ASBR to an OSPF internal router. 

Therefore, the cost from an internal router to a Type-2 external route’s destination equals the cost from 

the ASBR to the Type-2 external route’s destination.  

Related commands: default-route-advertise. 

 

z 

The import-route command cannot redistribute default routes. 

z 

Use the import-route bgp allow-ibgp command with care, because it redistributes both EBGP 

and IBGP routes that may cause routing loops. 

 

# Redistribute routes from RIP process 40 and specify the type, tag, and cost as 2, 33 and 50 for 

redistributed routes. 

<Sysname> system-view