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(VRF) table in a PE router associated with an OSPF instance is configured with the same

OSPF domain ID. The default OSPF domain ID is the null value 0.0.0.0. As shown in

Table 51 on page 836, a route with a null domain ID is handled differently from a route

without any domain ID at all.

Table 51: How a PE Router Redistributes and Advertises Routes

Route Redistributed

and Advertised As

Domain ID on the

Receiving Router

Domain ID of the

Route ReceivedRoute Received

Type 3 LSAA.B.C.DA.B.C.DType 3 route

Type 5 LSAE.F.G.HA.B.C.DType 3 route

Type 3 LSA0.0.0.00.0.0.0Type 3 route

Type 3 LSA0.0.0.0NullType 3 route

Type 3 LSANullNullType 3 route

Type 3 LSANull0.0.0.0Type 3 route

Type 5 LSANullA.B.C.DType 3 route

Type 5 LSAA.B.C.DNullType 3 route

Type 5 LSANot applicableNot applicableType 5 route

You can configure an OSPF domain ID for both version 2 and version 3 of OSPF. The only

difference in the configuration is that you include statements at the [edit routing-instances

routing-instance-name protocols ospf] hierarchy level for OSPF version 2 and at the

[edit routing-instances routing-instance-name protocols ospf3] hierarchy level for OSPF

version 3. The configuration descriptions that follow present the OSPF version 2 statement

only. However, the substatements are also valid for OSPF version 3.

To configure an OSPF domain ID, include the domain-id statement:

domain-id domain-Id;

You can include this statement at the following hierarchy levels:

•

[edit routing-instances routing-instance-name protocols ospf]

•

[edit logical-systems logical-system-name routing-instances routing-instance-name

protocols ospf]

You can set a VPN tag for the OSPF external routes generated by the PE router to prevent

looping. By default, this tag is automatically calculated and needs no configuration.

However, you can configure the domain VPN tag for Type 5 LSAs explicitly by including

the domain-vpn-tag statement:

no-domain-vpn-tag number;

ACX Series Universal Access Router Configuration Guide

Juniper ACX2000 Configuration Guide

Other manuals for Juniper ACX2000