Issu Guidelines - HP 5920 series Fundamentals Configuration Manual

Use FTP or TFTP to transfer the software image files or the .ipe file to the root directory of the
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master's storage medium. Before a subordinate member is upgraded, the system will automatically
copy the files to the subordinate member.

ISSU 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 long LACP timeout interval is used (the lacp period short command is not configured)
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on all member ports of the dynamic aggregation groups.
• To upgrade the IRF fabric to a compatible version, configure the IRF bridge MAC address
persistence by using the irf mac-address persistent timer 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.
If a feature is not supported in the new images, delete all relevant configurations and save the
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running configuration.
To uninstall an image, delete the configurations for the image and save the running configuration.
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Before starting an ISSU reboot upgrade on a single-member IRF fabric, also use the following guidelines:
Disable MSTP. Otherwise, a network topology change might occur during the upgrade, resulting in
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traffic interruption.
During an ISSU reboot, only static aggregation is supported. Dynamic aggregate is not supported.
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Disable CFD. Otherwise, the CFD CC function will be disabled during an ISSU reboot, which results
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in traffic abnormality.
• Disable DLDP. Otherwise, the peer device might consider a link a unidirectional link and shut down
the port because it cannot receive probe packets.
Disable loop detection. Otherwise, the peer device might mistakenly enable a port that was
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blocked or shut down due to a loop, which results in traffic abnormality.
A recalculation might occur for the following protocols after an ISSU reboot (because the peer
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device is timed out), resulting in service interruption:
Multicast protocols, including PIM, IGMP/MLD, and IGMP snooping/MLD snooping.
Routing protocols, including OSPF, ISIS, and BGP.
MPLS protocols, including LDP and RSVP.
FCoE protocols, including FIP and FSPF.
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 execute any command that is not relevant to the ISSU process.
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• Do not modify, delete, or rename any image files.
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,
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