Maintenance: ISSU issues

An issue of ISSU was encountered during my work which I would like to record here and share with people who encountered similar or exactly the same problem. My client wished to upgrade a SGA train IOS into SG train IOS, however during the ISSU software upgrade process problem occurred. During ISSU upgrade, the redundancy … Continue reading Maintenance: ISSU issues


Maintenance: ISSU process example

Switch-Active>enable Switch-Active#sh bootflash: 1 -rwx 13636500 Sep 6 2006 03:18:58 -08:00 cat4500-entservices-mz.122-31.SGA1 Switch-Active#sh slavebootflash: 1 -rwx 13636500 Sep 6 2006 03:18:58 -08:00 cat4500-entservices-mz.122-31.SGA1 Switch-Active#copy tftp:cat4500-entservices-mz.122-31.SGA5.bin bootflash: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Transfer completed. Switch-Active#copy tftp:cat4500-entservices-mz.122-31.SGA5.bin slavebootflash: !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Transfer completed. Switch-Active#issu loadversion 3 bootflash:cat4500-entservices-mz.122-31.SGA5.bin 4 slavebootflash:cat4500-entservices-mz.122-31.SGA5.bin Switch-Active#sh issu state detail Switch-Active#issu runversion 4 slavebootflash:cat4500-entservices-mz.122-31.SGA5.bin Slot 4 becomes the new Active, … Continue reading Maintenance: ISSU process example

Maintenance: In Service Software Upgrade (ISSU) Guide

In Service Software Upgrade is a feature to upgrade your IOS with minimum or no impact. Important 1. Both supervisory engines must be in SSO mode. 2. IOS version must be compatible i.e. SGA train cannot be upgraded to a SG train. An incompatibility issue during the upgrade will cause the redundancy mode in RPR … Continue reading Maintenance: In Service Software Upgrade (ISSU) Guide