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Forum Discussion
Solved
Bad IP Addressing as cascaded router
Very strange static IP assignation after firmware upgrade to V1.0.1.26_1.0.19. The R6400 is set as a cascaded router under a primary router, assigning local IPs in the range 10.0.0.2 - 254. B...
> But after firmware upgrade, some devices, although keeping their
> static IP configuration under MAC address, only receive IPs in the range
> 192.168.0.1 - 254 which of course do not work.
When you say "static", do you mean "reserved"?
If you revert to the old firmware, do things return to normal?
In some cases (bad software design), you may need to do a full
("factory") reset, and manual reconfiguration after loading different
firmware.
Are the 192.168.0.x addresses in the subnet of the primary router
(so, probably coming from its DHCP server)? Is the DHCP server on the
R6400 active? Perhaps: ADVANCED > Setup > LAN Setup : Use Router as
DHCP Server. Normally, I would not expect a broadcast DHCP request on
the R6400 LAN to make it to the WAN side of the R6400 (and, hence, to
the primary router).
> [...] Needs replacement?
A hardware problem seems unlikely. Bad firmware or configuration
seems more likely.
> But after firmware upgrade, some devices, although keeping their
> static IP configuration under MAC address, only receive IPs in the range
> 192.168.0.1 - 254 which of course do not work.
When you say "static", do you mean "reserved"?
If you revert to the old firmware, do things return to normal?
In some cases (bad software design), you may need to do a full
("factory") reset, and manual reconfiguration after loading different
firmware.
Are the 192.168.0.x addresses in the subnet of the primary router
(so, probably coming from its DHCP server)? Is the DHCP server on the
R6400 active? Perhaps: ADVANCED > Setup > LAN Setup : Use Router as
DHCP Server. Normally, I would not expect a broadcast DHCP request on
the R6400 LAN to make it to the WAN side of the R6400 (and, hence, to
the primary router).
> [...] Needs replacement?
A hardware problem seems unlikely. Bad firmware or configuration
seems more likely.
I downgraded the firmware and hard reset the router. Back to normal now. Will never update the firmware again.