How to troubleshoot DHCP issues on Ruckus ICX switch

[va10461]

Basic troubleshoot steps:

[+] Always collect the packet capture to verify the DORA process
[+] If the problem started after upgrade or downgrade - reconfigure DHCP on ICX device.
Check if any difference in commands in previous version to new version
[+] Check the DHCP server is on ICX or external DHCP server. Verify the DHCP server configuration on Ruckus if applicable.
[+] Make sure tagging is correct from server to client
[+] Make sure that DHCP options are set correctly on device
[+] Check the problem is in a specific Vlan or on multiple Vlans. Move the client to different vlan and check the problem exist.
[+] DHCP binding scalability
8095 - 500 clients can be connected
9010 - 3000 clients can be connected
[+] collect below command outputs
show ip dhcp-server statistics
show ip dhcp-server summary
Show ip dhcp-server binding
[+] If needed attach a external DHCP server(windows)

====================
DHCP configuration example
===================
Topology:

RKUS01(DHCP server)------e1/1/1----RKUS02(Relay agent)-------e1/1/5----RKUS04(DHCP client)

Hardware: ICX7450-48P << all the devices
Software: SPR08090kufi.bin << all the devices

Trying the DHCP in lab.

========
RKUS01
========

enable
configure terminal

ip dhcp-client disable
ip dhcp-server enable
!
ip dhcp-server pool demo <<< reconfigure the pool
excluded-address 192.168.2.100 192.168.2.254
lease 1 0 0
network 192.168.2.0 255.255.255.0
dhcp-default-router 192.168.2.1 0.0.0.0
domain-name office.s-cloud.net
Deploy << latest firmware, not needed

vlan 10 by port
tagged ethe 1/1/1
router-interface ve 10

interface ve 10
ip address 192.168.2.1 255.255.255.0

================================================
RKUS02
========

vlan 10 by port
tagged ethe 1/1/1
router-interface ve 10
!
vlan 20 by port
tagged ethe 1/1/5
router-interface ve 20
!

interface ve 10
ip address 192.168.2.2 255.255.255.0
!
interface ve 20
ip address 192.168.3.1 255.255.255.0
ip helper-address 1 192.168.2.1
!

interface ethernet 1/1/5

speed-duplex 1000-full

================================================
RKUS04
========
vlan 20 by port
tagged ethe 1/1/5
router-interface ve 20

interface ve 20
ip address 192.168.3.2 255.255.255.0
!

SSH@ICX7450-48P Router(config)#ip dhcp-client auto-update enable

SSH@ICX7450-48P Router(config-if-e1000-1/1/5)#ip dhcp-client enable