I'm trying to create a redundant backhaul link for my wireless backbone. I completely control both ends. My goal is great availability when one of the wireless (5ghz) links goes completely down, OR if one is simply poor. I don't need the RouterBoards to do the wireless as I plan to use dedicated APs and CPEs (Ubiquiti) on both ends.
I have been using two RB/433AH on each end; ether2-ether2 is connected with one link, ether3-ether3 with another. Ether1 on one end goes to my DIA and the ether1 on the other end will connect to my customers on a separate subnet.
OSPF works fine if one link goes completely down, but when one is limited to 1Mbps (limited by Ubiquiti traffic shaping to simulate a poor quality link), OSPF chooses that link for half of the duplex. Here is the OSPF config:
- For router 1 (inside router)
/system identity set name=rtr1
***Configure IP addresses on 3 interfaces
/ip address add address=192.168.20.1/24 interface=ether1
/ip address add address=192.168.21.1/24 interface=ether2
/ip address add address=192.168.22.1/24 interface=ether3
***Configure OSPF networks for all 3 interfaces
/routing ospf network add network=192.168.20.0/24 area=backbone
/routing ospf network add network=192.168.21.0/24 area=backbone
/routing ospf network add network=192.168.22.0/24 area=backbone
/routing ospf instance set 0 router-id=0.0.0.1
For router 2 (internet side router)
/system identity set name=rtr2
***Configure IP addresses on 3 interfaces
/ip address add address=192.168.23.1/24 interface=ether1
/ip address add address=192.168.21.2/24 interface=ether2
/ip address add address=192.168.22.2/24 interface=ether3
***Configure OSPF networks for all 3 interfaces
/routing ospf network add network=192.168.23.0/24 area=backbone
/routing ospf network add network=192.168.21.0/24 area=backbone
/routing ospf network add network=192.168.22.0/24 area=backbone
***Configure default route
/ip route add dst-address=0.0.0.0/0 gateway=192.168.23.2
***Allow OSPF to distribute the default route
/routing ospf instance set 0 distribute-default=always-as-type-1
I am open to any suggestions, including, using RB450Gs (switch mode?), other vendor layer 2 link aggregation, or 5GHz cards in the RB/433AHs.
Thanks again,
Thersh