Cisco NCS 5500 Series

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Configures a router ID for the OSPF process.

We recommend using a stable IPv4 address as the router ID.

Note

Step 4 area area-id

Example:

RP/0/RP0/CPU0:router(config-ospf)# area

Enters area configuration mode and configures a nonbackbone area for the OSPF process.

• The area-id argument can be entered in dotted-decimal or IPv4 address notation, such as area 1000 or area 0.0.3.232.

However, you must choose one form or the other for an area. We recommend using the IPv4 address notation.

Step 5 Do one of the following:

• range ip-address mask [ advertise | not-advertise ]

• range ipv6-prefix / prefix-length [ advertise | not-advertise ]

Example:

RP/0/RP0/CPU0:router(config-ospf-ar)# range 192.168.0.0 255.255.0.0 advertise

RP/0/RP0/CPU0:router(config-ospf-ar)# range 4004:f000::/32 advertise

Consolidates and summarizes OSPF routes at an area boundary.

• The advertise keyword causes the software to advertise the address range of subnetworks in a Type 3 summary

LSA.

• The not-advertise keyword causes the software to suppress the Type 3 summary LSA, and the subnetworks in the

range remain hidden from other areas.

• In the first example, all subnetworks for network 192.168.0.0 are summarized and advertised by the ABR into areas

outside the backbone.

• In the second example, two or more IPv4 interfaces are covered by a 192.x.x network.

Step 6 interface type interface-path-id

Example:

RP/0/RP0/CPU0:router(config-ospf-ar)# interface TenGigE 0/0/0/0

Enters interface configuration mode and associates one or more interfaces to the area.

Step 7 commit

Example

The following example shows the prefix range 2300::/16 summarized from area 1 into the backbone:

Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x

Implementing OSPF

Summarize Subnetwork LSAs on OSPF ABR

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