You will need to have the portals on different channels for best operation. Ideally, each portal is in it's own group, and you configure the two mesh clusters to prioritize accordingly (see below).
As for your questions, the default configuration is that the point will not come back until it's manually rebooted, or the point is blocked/dropped to force it to re-scan (that's the default for most all mesh configs regardless of vendor). You can configure it to 'reselect anytime', but be aware that this requires that the mesh point occasionally scan and will take approx 5min (scanning interval is 4-5 min). When it goes off to scan, it will disrupt the backhaul, so it's usually not done. Failover should be rare so it's usually not an issue.
1. Backhaul channels should be separate.
2. Best practice is to disable any ESSID on backhaul radios, yes.
3. Your backhaul radio TX power should be high enough such that the mesh links are in the 30-40 RSSI range, if they are over 40, back off the power. If it's under 30 and you can get more TX power out, raise it up.
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Multi-Cluster AOS Mesh[edit]
- In this use case, for mesh redundancy there will be two portals and points, each portal/point pair are in their own cluster.
- Also created in each mesh cluster, as part of the cluster priority, that the other cluster is configured as a failover (or Priority2) of the other cluster.
- If Portal-1 goes down, because the 'Redundant-Mesh-1' cluster has 'Redundant-Mesh-2' as a secondary cluster to fail to, Point 1 will fail over to Portal 2.
ap wired-ap-profile "redundant-mesh-1"
wired-ap-enable
trusted
forward-mode bridge
switchport mode trunk
switchport trunk native vlan 201
switchport trunk allowed vlan 202-203
!
ap wired-ap-profile "redundant-mesh-2"
wired-ap-enable
trusted
forward-mode bridge
switchport mode trunk
switchport trunk native vlan 201
switchport trunk allowed vlan 202-203
!
ap mesh-cluster-profile "redundant-mesh-1"
cluster "redundant-mesh-1"
opmode wpa2-psk-aes
wpa-passphrase <WPA2-Mesh-Passphrase>
!
ap mesh-cluster-profile "redundant-mesh-2"
cluster "redundant-mesh-2"
opmode wpa2-psk-aes
wpa-passphrase <WPA2-Mesh-Passphrase>
!
ap wired-port-profile "redundant-mesh-1"
wired-ap-profile "redundant-mesh-1"
!
ap wired-port-profile "redundant-mesh-2"
wired-ap-profile "redundant-mesh-2"
!
rf arm-profile "arm-disable"
assignment disable
!
rf dot11a-radio-profile "ch157"
channel 157
tx-power 3
arm-profile "arm-disable"
!
rf dot11a-radio-profile "ch161"
channel 161
tx-power 3
arm-profile "arm-disable"
!
ap-group "redundant-mesh-1"
dot11a-radio-profile "ch157"
enet0-port-profile "redundant-mesh-1"
mesh-cluster-profile "redundant-mesh-1" priority 1
mesh-cluster-profile "redundant-mesh-2" priority 2
!
ap-group "redundant-mesh-2"
dot11a-radio-profile "ch161"
enet0-port-profile "redundant-mesh-2"
mesh-cluster-profile "redundant-mesh-2" priority 1
mesh-cluster-profile "redundant-mesh-1" priority 2
!