OSPF experiment in mGRE environment

Topological analysis

1、 basic IP To configure , And in R1-R5 Configure the default route to R6

2、R1/R4/R5, Create a tunnel , And turn on the central routing protocol , Set all as Center , And find another center to register

3、R1/R2/R3, Create a tunnel , And turn on the central routing protocol ,R1 Set as center ,R2/R3 look for R1 register .

4、 All private network segments use OSPF Get route .

To configure

1、 basic IP To configure

2、 A default line points to R6

3、 Create two tunnels , With a R4/R5, With a R2/R3, Tunnel configuration , Turn on the central routing protocol , Enable pseudo broadcast . At the tunnel interface , Turn on OSPF, because OSPF stay MGRE To think in silence P2P Network type , It is amended as follows P2MP that will do . If it's changed to Broadcsat, You need to R2 and R3 Of DR Election closed , Change the priority value to 0（ Abandon the election ）.

experimental result