Chapter 5 Configuring Additional Router Features

Configuration Limiting

Table 5-6

OSPFv2 and OSPFv3 Configuration Limits and Commands

 

 

 

 

 

 

 

 

 

Default

Absolute

 

 

Feature Limit

 

Maximum

Maximum

Configuration Command

Show Current Settings Command

Description

 

Limit

Limit

(Router Configuration Mode)

(EXEC Mode)

 

 

 

 

 

Maximum number of

255

1024

maximum interfaces n

show ospf

interfaces that can be

 

 

 

 

configured for an

 

 

 

 

OSPF instance

 

 

 

 

 

 

 

 

 

 

Maximum routes

10,000

28,672

maximum redistributed-prefixes

show ospf

redistributed into

 

 

n

Note The maximum number of

OSPF

 

 

 

 

 

 

 

 

redistributed prefixes is

 

 

 

 

 

 

 

 

 

 

displayed only if

 

 

 

 

 

redistribution is configured.

 

 

 

 

 

Maximum number of

32

32

maximum paths n

show running-config router ospf

parallel routes

 

(OSPFv2)

 

 

Note This command shows only

(maximum paths) on

 

 

 

16

 

 

changes to the default value.

Cisco CRS-1 routers

 

 

(OSPFv3)

 

 

If the maximum paths

 

 

 

 

 

 

 

 

 

command does not appear,

 

 

 

 

 

the router is set to the default

 

 

 

 

 

value.

 

 

 

 

 

Maximum number of

16

16

maximum paths n

show running-config router ospf

parallel routes

 

 

 

 

Note This command shows only

(maximum paths) on a

 

 

 

 

 

 

changes to the default value.

Cisco XR 12000

 

 

 

 

 

 

 

 

If the maximum paths

Series Router

 

 

 

 

 

 

 

 

command does not appear,

 

 

 

 

 

 

 

 

 

 

the router is set to the default

 

 

 

 

 

value.

 

 

 

 

 

 

Examples

The following subsections provide the following examples:

Maximum Interfaces for Each OSPF Instance, page 5-18

Maximum Routes Redistributed into OSPF, page 5-19

Number of Parallel Links (max-paths), page 5-19

Maximum Interfaces for Each OSPF Instance

In the following example, the show ospf command is used to display the maximum number of OSPF interfaces:

RP/0/RP1/CPU0:router# show ospf

Routing Process "ospf 100" with ID 0.0.0.0

Supports

only single

TOS(TOS0) routes

Supports

opaque LSA

 

It is an

area border

router

Initial SPF schedule

delay 5000 msecs

 

 

 

Minimum hold time between two consecutive SPFs 10000

msecs

 

 

 

Maximum

wait time between two consecutive SPFs 10000

msecs

 

 

 

Initial

LSA throttle delay 500 msecs

 

 

 

 

 

Cisco IOS XR Getting Started Guide

 

 

 

 

 

 

 

 

5-18

 

 

 

OL-10957-02

 

 

 

 

 

 

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Cisco Systems Cisco IOS XR Maximum interfaces n Show ospf, Maximum redistributed-prefixes Show ospf, If the maximum paths