Rolling back configuration···································································································································· 97

Specifying a next-startup configuration file ················································································································· 98

Backing up the main next-startup configuration file to a TFTP server ······································································· 98

Restoring the main next-startup configuration file from a TFTP server ······································································ 99

Deleting a next-startup configuration file ····················································································································· 99

Displaying and maintaining configuration files ········································································································ 100

Upgrading software ················································································································································ 101

Overview ······································································································································································· 101

Software types ····················································································································································· 101

Software file naming conventions ······················································································································ 101

Comware image redundancy and loading procedure ··················································································· 102

System startup process ········································································································································ 102

Upgrade methods ························································································································································ 103

Non-ISSU upgrade procedure summary ···················································································································· 103

Preparing for the upgrade ·········································································································································· 104

Preloading the Boot ROM image to Boot ROM ········································································································ 104

Specifying the startup image file and completing the upgrade ·············································································· 105

Displaying and maintaining software image settings ······························································································ 106

Non-ISSU software upgrade example ······················································································································· 106

Network requirements ········································································································································· 106

Configuration procedure ···································································································································· 106

Verifying the configuration ································································································································· 107

ISSU overview ························································································································································· 108

ISSU methods ································································································································································ 108

ISSU methods for a compatible version ············································································································ 109

ISSU method for an incompatible version ········································································································ 109

ISSU command series ·················································································································································· 109

ISSU restrictions ···························································································································································· 110

ISSU prerequisites ························································································································································ 110

ISSU guidelines ···························································································································································· 111

Performing an ISSU by using issu series commands ···························································································· 113

Performing an ISSU for a multichassis IRF fabric ······································································································ 113

Performing an ISSU for a single-chassis IRF fabric ··································································································· 114

Displaying and maintaining ISSU ······························································································································ 115

ISSU examples for using issu series commands ········································································································ 116

Software image upgrade to a compatible version ·························································································· 116

Software image upgrade to an incompatible version ····················································································· 119

Software image rollback example ····················································································································· 121

Performing an ISSU by using install series commands ························································································· 124

Performing an ISSU ······················································································································································ 124

Obtaining and decompressing an .ipe file ······································································································ 124

Installing or upgrading software images ·········································································································· 124

Uninstalling feature or patch images ················································································································ 125

Rolling back the software configuration ···················································································································· 125

Aborting a software activate/deactivate operation ································································································· 126

Verifying software images ··········································································································································· 126

Removing inactive software images ··························································································································· 126

ISSU examples for using install series commands ···································································································· 127