The Controller port missing ARP entry for the gateway after upgrading to 5.6.11

•  After upgrading the IONs to the 5.6.11 code, the controller port becomes inaccessible externally.

# ping controller 8.8.8.8
PING 8.8.8.8 (8.8.8.8) from 10.60.66.21: 56 data bytes

--- 8.8.8.8 ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss
exit status 1

• The controller port is missing the ARP for its gateway.

# inspect system arp interface=controller

Address                  HWtype  HWaddress           Flags Mask            Iface
10.60.66.1                       (incomplete)                              eth4

• Prisma SD-WAN.

• Software Issue.

1. The issue has been addressed under CGSDW-12977  and fixed in 6.2.2, 5.6.13 & 6.1.3.
2. Upgrade to the above versions or higher will resolve the issue.