When upgrading the radio firmware from versions earlier than 5.7.2 to version 5.9.1, the Separate Wireless Management Interface may lose its Subnet Mask configuration.
Recommended Workaround:
Prior to the upgrade, disable the Separate Wireless Management Interface. Once the upgrade is complete, re-enable it. This process can be efficiently performed using a cnMaestro template.
Bridged+Static IP
Ethernet Port Security = Disabled
Management VLAN ID configured, priority = 7
Management VLAN Access = Ethernet and Wireless
Data VLAN = Disabled
No Membership VLANs or VLAN Mapping entries
I donāt think the rest is likely to be relevant, butā¦
IPv6 = Disabled
ARP-NAT = Disabled
STP = Disabled
DHCP Server Below SM = Disabled
LLDP = Enabled
LLDP Mode = Rx+Tx
Broadcast/Multicast Traffic Shaping = all disabled
That is likely the issue. There is some bizarre bridge filtering in place on ePMP radios when they are set to station mode. They arenāt a pure bridge. Try disabling acceleration via the cli and see if that helps:
config set cambiumAccelerationEngine 3
config commit
reboot
That could explain some of the behavior we have seen. Looking at some other forum posts, it seems the recommendation is if youāre using MPLS or VPLS, its best to disable this setting?
Disabling acceleration and rebooting both ends of the links solved the original issue.
We tried this on a few other f425 links where one end had lost comms, and it fixed them too.
We had one ring of sites with all f425s where radius on the tiks started timing out randomly, disabling acceleration fixed those tooā¦
As well as a one-off where the Master lost contact instead of the slave. Also fixed.