Why does my airport extreme stop issuing dynamic ip

On several occasions, my airport extreme 5th gen stops issuing IP's when computers are connected to the network and seeking dynamic IP's.
Computers that are already connected work fine, but those that are restarted. or computers being connected by WiFi cannot capture a DHCP generated IP.
The problem originally occured occasionally on a previous airport extreme, so I replaced it with a new 5th generation. This AE also shows the same problem on occasion ( perhaps once every few months).
My network has this AE that serves as the connection to the internet, and as the DHCP server, plus four additionl AE's acting bridges. Each of these four have static IP's in the network.
I have a second internal network attached to the same DSL system using a different external IP. This network only differs from the first in that it only has two AE's, one of which is the DHCP server for that network.
Can anyone suggest what might be triggering this problem?
Thanks
JD

No problem.. but I am interested to hear what happens.
The terminal command btw is based on default password ie. public.
If you change the password as you are forced to do now in v6 utility the command changes to
natutil -v -i -s
It will then request a password from you.
Not all of the info here is correct.. the dhcp range is not correct.
natutil -v -i -s
Enter Password:
Searching for Internet Gateway Devices...
2 IGDs found
Getting IGD status...ok
WAN connection details:
Connection type: Ethernet
Link status: Up
Download bps: 1000000000
Upload bps: 1000000000
WAN IP connection details:
Connection type: IP_Bridged
Connection status: Connected
IP address: 192.168.2.201
Uptime: 72333
RSIP Available: false
NAT Enabled: false
LAN DHCP configuration:
Configurable DHCP: true
Forwarding DHCP: false
Low IP: 10.0.1.2
High IP: 10.0.1.200
Netmask: 255.255.255.0
DNS domain: (unknown)
Getting IGD status...ok
WAN connection details:
Connection type: Ethernet
Link status: Down
Download bps: 0
Upload bps: 0
WAN IP connection details:
Connection type: IP_Bridged
Connection status: Disconnected
IP address: 192.168.2.203
Uptime: 413378
RSIP Available: false
NAT Enabled: false
LAN DHCP configuration:
Configurable DHCP: true
Forwarding DHCP: false
Low IP: 10.0.1.2
High IP: 10.0.1.200
Netmask: 255.255.255.0
DNS domain: (unknown)
Still, it might help.

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Why does my airport extreme stop issuing dynamic ip

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