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OSPF backup without using a tunnel
Let us assume that the link between the routers OSPF-Main and OSPF-peer-1 is the main one. If it
goes down, we want the traffic switch over to the link going through the router OSPF-peer-2.
This example shows how to use OSPF for backup purposes, if you are controlling all the involved
routers, and you can run OSPF on them
For this:
1.
We introduce an OSPF area with area ID=0.0.0.1, which includes all three routers shown on
the diagram
2.
Only the OSPF-Main router will have the default route configured. Its interfaces peer1 and
peer2 will be configured for the OSPF protocol. The interface main_gw will not be used for
distributing the OSPF routing information
3.
The routers OSPF-peer-1 and OSPF-peer-2 will distribute their connected route information,
and receive the default route using the OSPF protocol
Now let's setup the OSPF_MAIN router.
The router should have 3 NICs:
[admin@OSPF_MAIN] interface> print
Flags: X - disabled, D - dynamic, R - running
#
NAME
TYPE
RX-RATE
TX-RATE
MTU
0
R main_gw
ether
0
0
1500
1
R to_peer_1
ether
0
0
1500
Page 115 of 695
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Содержание RouterOS v2.9
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