SRG

SCSIraidGURU’s World

GRE with EIGRP and OSPF (CCNP)

I have been reading the Official Cert Guide for the CCNP Route exam.   It said GRE is the only tunneling protocol that is needed for the exam.   I created four tunnels.  The sh int tunx outputs are at the bottom of the page for each tunnel.

Tunnel 0 : IPv4 for EIGRP : iosv-1 to iosv-3

Tunnel 1 : IPv6 for EIGRP : iosv-1 to iosv-3

Tunnel 2 : IPv4 for OSPF : iosv-6 to iosv-9

Tunnel 3 : IPv6 for OSPF : iosv-6 to iosv-9

I used the interfaces connecting to the center router instead of loopbacks.   

Routers iosv-2 and iosv-8 are in between the tunnel end points.  They only connect the endpoints.  They are not part of EIGRP or OSPF.  I used static routes from the end points of the tunnel instead.

All routers have IPv4 and IPv6 addresses on them.  I followed my 172.21.4.x and 172.21.6.x for OSPF router-id and 172.22.4.x and 172.22.6.x for EIGRP router-id.  4 is iPv4 and 6 is IPv6.

Area 0 is on both edges of tunnels 2 and 3.  On the left, area 1 and right is area 2.   As always flat-1 gives IPv4 and IPv6 access to my Ubuntu TFTP. 

The OSPF default-metric for each router is the iosv-x times 1000.  so iosv-9 is a metric of 9000.  I did this to analyze the routing tables.   No you won’t do this for real. 

iosv-1

iosv-3

iosv-4 : eigrp stub connected

iosv-5

iosv-5 is both eigrp and ospf with routes redistributed between the protocols. 

iosv-6

iosv-7: area 1 stub

 

iosv-9

iosv-10

iosv-11: area 1 stub

iosv-12

iosv-13

Tunnel 0

Tunnel 1

Tunnel 2

Tunnel 3