Issu Prerequisites; Issu Restrictions And Guidelines - HP 10500 Series Configuration Manual

ISSU prerequisites

Read the software release notes to determine which software images need to be upgraded,
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whether these software images are compatible with one another, and whether these software
images are compatible with the software images running on the device. Then, based on the
compatibility, determine the command series to use.
Use the display device command to verify that the system is operating correctly. If there are any
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problems, remove the problems before performing an ISSU.
Use the display mdc command to verify that all MDCs are in active state.
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• Verify that the storage media on the MPUs have enough free space for the new image files.
Use the save command to save the running configuration.
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In standalone mode, use FTP or TFTP to transfer the software image files (in .bin or .ipe) to the root
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directory of the active MPU's storage medium. Before the standby MPU is upgraded, the system will
prompt you to copy the files to the standby MPU.
• In IRF mode, use FTP or TFTP to transfer the software image files (in .bin or .ipe) to the root directory
of the global active MPU's storage medium. Before a standby MPU in the IRF fabric is upgraded,
the system will prompt you to copy the files to the standby MPU.

ISSU restrictions and guidelines

Before starting an ISSU, complete the following tasks:
Enable GR or NSR for protocols including LDP, RSVP, OSPF, ISIS, BGP, and FSPF, and disable BFD
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for protocols including LDP, RSVP, OSPF, ISIS, RIP, BGP, VRRP, and NQA. Otherwise, service might
be interrupted during the ISSU.
Make sure the LACP timeout interval is the long timeout interval (the lacp period short command is
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not configured) on all member ports of the dynamic aggregation groups.
To upgrade the IRF fabric to a compatible version, configure the IRF bridge MAC address
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persistence by using the irf mac-address persistent timer command or irf mac-address persistent
always command. To upgrade the IRF fabric to an incompatible version, configure the irf
mac-address persistent always command if the bridge MAC address is the MAC address of the
device for which you want to execute the issu load command.
During an ISSU, use the following guidelines:
Make sure you are the only one who is logged in to the device and that no other administrators will
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log in during the upgrade.
• Do not reboot, install, or remove any card, and make sure the network topology is stable.
Do not execute any command that is not relevant to the ISSU process.
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Do not modify, delete, or rename any image files.
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The issu series configuration commands and the install series configuration commands are mutually
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exclusive. You can use only one series of configuration commands for one ISSU process. However,
you can use the install series displaying and maintaining commands with the issu series
configuration commands.
All MDCs on a device run the same software images. To upgrade MDCs, you only need to perform
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the upgrade on the default MDC.
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