Allied Telesis AT-WR4500 manual Functioning of the Backup, On OSPFpeer2

AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers					109
RouterOS v3 Configuration and User Guide
	On OSPF_peer_1:
	[admin@OSPF_peer_1] > ip route pr
	Flags: X - disabled, I - invalid, D - dynamic, J - rejected,
	C - connect, S - static, r - rip, o - ospf, b - bgp
	#	DST-ADDRESS	G GATEWAY	DISTANCE INTERFACE
	0	Do 192.168.0.0/24	r 10.1.0.2	110	to_main
	1	Io 10.3.0.0/24		110
	2	DC 10.3.0.0/24	r 0.0.0.0	0	backup
	3	Do 10.2.0.0/24	r 10.1.0.2	110	to_main
	4	Io 10.1.0.0/24		110
	5	DC 10.1.0.0/24	r 0.0.0.0	0	to_main
	On OSPF_peer_2:
	[admin@OSPF_peer_2] > ip route print
	Flags: X - disabled, I - invalid, D - dynamic, J - rejected,
	C - connect, S - static, r - rip, o - ospf, b - bgp
	#	DST-ADDRESS	G GATEWAY	DISTANCE INTERFACE
	0	Do 192.168.0.0/24	r 10.2.0.2	110	to_main
	1	Io 10.3.0.0/24		110
	2	DC 10.3.0.0/24	r 0.0.0.0	0	to_peer_1
	3	Io 10.2.0.0/24		110
	4	DC 10.2.0.0/24	r 0.0.0.0	0	to_main
	5	Do 10.1.0.0/24	r 10.2.0.2	110	to_main

Functioning of the Backup

If the link between routers OSPF_MAIN and OSPF_peer_1 goes down, we have the following situation:

	Internet
main_gw 192.168.0.11
[OSPF_MAIN]	to_peer2 10.2.0.2
to_peer1 10.1.0.2	to_main 10.2.0.1
	Cost=1
	Cost=1	[OSPF_peer_2]
	Cost=1
to_main 10.1.0.1	to_peer1 10.3.0.2
[OSPF_peer_1]	backup 10.3.0.1
	Figure 15: OSPF Backup