HP 5830 series User Manual

108
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 Figure 40,
to ensure high availability for user networks, cross-device link aggregation is
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
ISSU upgrade procedure
ISSU follows a strict procedure, as shown in Figure 41.
IRF
SwitchA SwitchB SwitchC
SwitchD
SwitchE
1
23
4
5
6
7
8
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
9
7: GE3/0/1
8: GE3/0/2
9: GE3/0/3
SwitchF
4: GE2/0/1
5: GE2/0/2
6: GE2/0/3
1
2
3
1
2
3
1
2
3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
Users
Users Users
Core
Aggregation Group 1
Aggregation Group 2
Aggregation Group 3

HP 5830 series Specifications

General

Brand	HP
Model	5830 series
Category	Switch
Language	English