Manual

Cisco IOS In Service Software Upgrade Process

Information About Performing ISSU

Cisco IOS Release 12.2(28)SB

After you have copied the Cisco IOS software to both file systems, load the new version of Cisco IOS

software onto the standby RP (see Figure 3).

Figure 3 Load New Cisco IOS Software on the Standby RP

Line cards

Active

Route

Processor

Cisco IOS

12.x(y)S

Cisco IOS

12.x(y)S

Cisco IOS

12.x(z)S

Cisco IOS

12.x(y)S

Load new version

of Cisco IOS

on standby

Cisco IOS

12.x(z)S

Cisco IOS

12.x(z)S

Standby

Route

Processor

127259