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My product is TZ500 and NSa4650 and HA.
WAN is DHCP.
HA has failed over.
When secondary TZ or NSa is active, WAN IP is 0.0.0.0
WAN DHCP does not work in HA.
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While the IP address is 0.0.0.0 on the active unit after failover, could you please check the IP address on the standby unit for WAN interface? Does it also show 0.0.0.0? What is the firmware on your TZ 500 and NSa 4650? Is this issue common to both the models of the SonicWalls TZ 500 and NSa 4650?
Technical Support Advisor - Premier Services
The wan ip of the standby unit is also 0.0.0.0
The firmware is 220.127.116.11-83n.
Yes, it happens in common with all models.
Let me check for possible reported issues and get back to you. Please standby. Appreciate your patience.
Thanks for your patience. I verified internally and seems like there are no similar issues found.
Could you please upgrade firmware on one of the HA pairs to 18.104.22.168-89n and check for the same issue?
We had the same issue on a customer site with an 670 on most current firmware, the customer had a WAN Network that consisted of only one IP so the modem denied the secondary FW the IP based on some ARP Entries, we had the ISP to reconfigure it to a Static IP to avoid that issue.
On an additional note, it also happend on one of our 2700 but it simply took another IP from the WAN Network
My conclusio is to avoid WAN DHCP whenever possible.
We can avoid ARP issues between Primary and Secondary FW's by enabling Virtual MAC on the HA settings. The Virtual MAC is applicable to all interfaces.