Configuring Issu; Overview - HP 5800 Series Configuration Manual

Configuring ISSU

Overview

ISSU enables software upgrade and ensures continuous packet forwarding.
As shown in
configured on the IRF member switches at the distribution layer so that 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, use ISSU to upgrade the boot file 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 2 IRF network diagram
IRF virtual
device
Switch D
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
Switch A
Users
Figure 2, to ensure high availability for user networks, cross-device link aggregation is
Core
Switch E
4
6
5
2 3
1
2 2
1
1
3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
Switch B
Users
Aggregation group 1
Aggregation group 2
Aggregation group 3
4: GE2/0/1
5: GE2/0/2
6: GE2/0/3
7
8
9
2
3
1
3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3
Switch C
Users
138
Switch F
7: GE3/0/1
8: GE3/0/2
9: GE3/0/3
1: GE1/0/1
2: GE1/0/2
3: GE1/0/3