Chapter 4 Configuring Additional Router Features

Configuration Limiting

F I N A L D R A F T — C i s c o C o n f i d e n t i a l

RP/0/RSP1/CPU0:router(config-isis-af)# maximum-paths 10 RP/0/RSP1/CPU0:router(config-isis-af)# maximum-redistributed-prefixes 12000 RP/0/RSP1/CPU0:router(config-isis-af)# commit

RP/0/RSP1/CPU0:Mar 30 14:11:07 : config[65739]: %LIBTARCFG-6-COMMIT : Configuration committed by user 'cisco'. Use 'show configuration commit changes 1000000535' to view the changes.

RP/0/RSP1/CPU0:router(config-isis-af)#

OSPFv2 and v3 Configuration Limits

Table 4-6summarizes the maximum limits for Open Shortest Path First (OSPF) protocol, including the commands used to display and change the limits.

Table 4-6

OSPFv2 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

4294967295

maximum redistributed-prefixes

show ospf

redistributed into

 

 

n

Note The maximum number of

OSPF

 

 

 

 

 

 

 

 

redistributed prefixes

 

 

 

 

 

 

 

 

 

 

appear only if

 

 

 

 

 

redistribution is

 

 

 

 

 

configured.

 

 

 

 

 

Maximum number of

32

32

maximum paths n

show running-config router ospf

parallel routes

 

 

 

 

Note This command shows only

(maximum paths) on

 

 

 

 

 

 

changes to the default

Cisco ASR 9000

 

 

 

 

 

 

 

 

value. If the maximum

Series routers

 

 

 

 

 

 

 

 

paths command does not

 

 

 

 

 

 

 

 

 

 

appear, the router is set to

 

 

 

 

 

the default value.

 

 

 

 

 

 

Examples

The following examples illustrate OSPF configuration limits:

•Maximum Interfaces for Each OSPF Instance: Example, page 4-21

•Maximum Routes Redistributed into OSPF: Example, page 4-22

•Number of Parallel Links (max-paths): Example, page 4-23

Maximum Interfaces for Each OSPF Instance: Example

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

RP/0/RSP1/CPU0:router# show ospf

 

 

Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide

 

 

 

 

 

 

OL-17502-01

 

 

4-21

 

 

 

 

 

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Cisco Systems A9K24X10GETR, ASR 9000 OSPFv2 and v3 Configuration Limits, Maximum Interfaces for Each Ospf Instance Example
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A9KMOD80TR, A9K24X10GETR, ASR 9000 specifications

Cisco Systems has long been a leader in networking technology, providing cutting-edge solutions for service providers and enterprise organizations alike. Among their standout products is the Cisco ASR 9000 Series Aggregation Services Routers, notably the A9K24X10GETR and the A9KMOD80TR models. These routers are engineered to deliver unmatched performance, scalability, and versatility for networks that require high bandwidth and low latency.

The Cisco ASR 9000 Series is built for the needs of today's complex service provider and enterprise networks. A significant feature of the A9K24X10GETR is its 24-port 10-Gigabit Ethernet module. This functionality allows for high-density connectivity, making it ideal for aggregating numerous connections to different parts of a network while maintaining optimal performance. Whether used for Internet service providers delivering high-speed connectivity or for enterprises looking to connect multiple branches, the A9K24X10GETR provides robust and reliable data transmission.

Further enhancing the capabilities of the ASR 9000 is the A9KMOD80TR module, which supports an extensive range of services. This module is designed to run a variety of technologies, including Layer 2 and Layer 3 services, MPLS (Multiprotocol Label Switching), and IPv6. Its ability to integrate seamlessly into existing infrastructures while providing the advanced features customers demand makes it an invaluable asset for network engineering teams.

Another cutting-edge technology present in the ASR 9000 Series is its support for eBGP (External Border Gateway Protocol), which plays a critical role in managing traffic across multiple networks. The routers are equipped with advanced telemetry features, empowering operators with real-time insights into network performance and health. Additionally, they come with integrated security features that protect against DDoS threats and other vulnerabilities.

In summary, Cisco's ASR 9000 Series, particularly the A9K24X10GETR and A9KMOD80TR, combines high-density connections, extensive service support, and advanced security and telemetry capabilities. These routers are perfect for demanding environments where reliable performance and adaptability are crucial. With their focus on innovation and performance, Cisco continues to shape the future of networking technology.
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