Performing Issu; Overview; Issu Upgrade Procedure - HP 5830 Series Configuration Manual

Performing ISSU

This chapter describes how to use the In-Service Software Upgrade (ISSU) feature to upgrade software.

Overview

ISSU enables software upgrade and ensures continuous packet forwarding.
As shown in
configured on the IRF member switches at the distribution layer so every three physical links with the same
color between the IRF member switches and access switches are aggregated as one logical link. In this
scenario, you can use ISSU to upgrade system software of each IRF member switch to ensure non-stop
forwarding or reduce down time for users connected to Switch A, Switch B, and Switch C.
Figure 40 IRF network diagram
IRF
SwitchD
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
SwitchA
Users

ISSU upgrade procedure

ISSU follows a strict procedure, as shown in
Figure 40, to ensure high availability for user networks, cross-device link aggregation is
Core
SwitchE
4
2 3
1
2
1
1
3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
SwitchB
Users
Aggregation Group 1
Aggregation Group 2
4: GE2/0/1 Aggregation Group 3
5: GE2/0/2
6: GE2/0/3
6
5
7
8
9
2
2
3
1
3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
SwitchC
Users
Figure 41.
108
SwitchF
7: GE3/0/1
8: GE3/0/2
9: GE3/0/3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3