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Loading Cisco IOS Images

Cisco 12000 Series Gigabit Switch Routers 15

Conﬁguration Tasks

The following conﬁguration tasks are listed for the Cisco 12000 series because they are in addition

to or different from conﬁguration information listed in the Cisco IOS documentation set. All tasks

are optional.

• Loading Cisco IOS Images

• Troubleshooting

• Monitoring and Maintaining the Cisco 12000 Series

In addition to the above conﬁguration tasks, also refer to the “Cisco Express Forwarding” feature

module for information on how to conﬁgure CEF on the Cisco 12000 series.

For information on conﬁguring IP and IP Routing, refer to the “Conﬁguring IP” and “Conﬁguring

IP Routing Protocols” chapters in the Network Protocols Conﬁguration Guide, Part 1.

For information on conﬁguring the line cards and Gigabit Route Processor, refer to the following

publications that accompanies the hardware:

• OC-12c/STM-4c Asynchronous Transfer Mode line card—Refer to the OC-12c/STM-4c

Asynchronous Transfer Mode Line Card Installation and Conﬁguration publication.

• OC-12c/STM-4c Packet-Over SONET line card—Refer to the OC-12c/STM-4c

Packet-Over-SONET Line Card Installation and Conﬁguration publication.

• Quad OC-3c/STM-1c Packet-Over SONET line card—Refer to the Quad OC-3c/STM-1c

Packet-Over- SONET Line Card Installation and Conﬁguration publication.

• Gigabit Route Processor and Ethernet interface on the GRP—Refer to the Gigabit Route

Processor (GRP) Installation and Conﬁguration publication.

Note New commands associated with the line cards are included in the “Command Reference”

section of this feature module.

Loading Cisco IOS Images

Loading a Cisco IOS image on the GRP on a Cisco 12000 series router is the same as loading images

on Cisco 7500 series routers. In addition to the Cisco IOS image that resides on the GRP, each line

card on the Cisco 12000 series has a Cisco IOS image. When the router is reloaded, the speciﬁed

Cisco IOS image is loaded onto the GRP, and that image is automatically dowloaded to all the line

cards.

For information on how to load Cisco IOS images, refer to the “Loading Images and Conﬁguration

Files” chapter in the Conﬁguration Fundamentals Conﬁguration Guide. For additional information,

refer to the “Observing System Startup and Performing a Basic Conﬁguration” chapter in the

Cisco 12012 Gigabit Switch Router Installation and Conﬁguration Guide.

Normally, you want the same Cisco IOS image on the GRP and all line cards. However, if you want

to upgrade a line card with a new version of microcode for testing or to ﬁx a defect, you might need

to load a Cisco IOS image that is different from the one on the line card. Additionally, you might

need to load a new image on the line card to work around a problem that is affecting only one of the

line cards.

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