Hmmm....may be not the one of the best diagram I have here these days....but using MS Paint those are easy to build...yet enough informative....and takes less time than Visio style of diagram.
Anyways...here is a quick challenge task....R1/R2/R3 are configured in Frame-Relay hub and spoke style of network using Physical Frame-relay Interfaces. Loopback 1 on all routers has been added for basic reach-ability using Static Routing. Now Challenge was to establigh connectivity from R2's Loop 2 to R3's Loop 2 interface through GRE tunnel. EIGRP is running over GRE tunnel and Loop 2 interfaces. So Using R1 I basically tried to simulate Service Provider Router which is connecting two branch office routers but Provider Shouldn't be able to see routing information of Branch offices LAN segments which I simulated here using Loopback 2 interfaces. So all set....lets hop on to config :)
R1#sh ip int b | e unassigned|down
Interface IP-Address OK? Method Status Protocol
Serial0/0 10.0.0.1 YES manual up up
Loopback1 100.100.100.100 YES manual up up
R1#sh run | s ip route
ip route 5.5.5.1 255.255.255.255 10.0.0.2
ip route 5.5.5.2 255.255.255.255 10.0.0.3
ip route 125.0.0.0 255.0.0.0 10.0.0.2
ip route 150.0.0.0 255.0.0.0 10.0.0.3
R1#sh run int s0/0
Building configuration...
Current configuration : 227 bytes
!
interface Serial0/0
ip address 10.0.0.1 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.0.0.2 102 broadcast
frame-relay map ip 10.0.0.3 103 broadcast
no frame-relay inverse-arp
end
R2(config)#do sh ip int b | e unassigned|down
Interface IP-Address OK? Method Status Protocol
Serial0/0 10.0.0.2 YES manual up up
Loopback1 125.125.125.125 YES manual up up
Loopback2 1.1.1.1 YES manual up up
Tunnel1 5.5.5.1 YES manual up up
R2(config)#do sh run | s ip route
ip route 5.5.5.2 255.255.255.255 10.0.0.1
ip route 100.0.0.0 255.0.0.0 10.0.0.1
ip route 150.0.0.0 255.0.0.0 10.0.0.1
R2(config)#do sh run | s router
router eigrp 10
network 1.1.1.1 0.0.0.0
network 5.5.5.1 0.0.0.0
no auto-summary
R2(config)#do sh run int s0/0
Building configuration...
Current configuration : 217 bytes
!
interface Serial0/0
ip address 10.0.0.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.0.0.1 201 broadcast
frame-relay map ip 10.0.0.3 201
no frame-relay inverse-arp
end
R2(config-if)#do sh run int tu 1
Building configuration...
Current configuration : 120 bytes
!
interface Tunnel1
ip address 5.5.5.1 255.255.255.0
tunnel source Loopback1
tunnel destination 150.150.150.150
end
R3#sh ip int b | e unassigned|down
Interface IP-Address OK? Method Status Protocol
Serial0/0 10.0.0.3 YES manual up up
Loopback1 150.150.150.150 YES manual up up
Loopback2 2.2.2.1 YES manual up up
Tunnel1 5.5.5.2 YES manual up up
R3#sh run | s ip route
ip route 5.5.5.1 255.255.255.255 10.0.0.1
ip route 100.0.0.0 255.0.0.0 10.0.0.1
ip route 125.0.0.0 255.0.0.0 10.0.0.1
R3#sh run | s router
router eigrp 10
network 2.2.2.1 0.0.0.0
network 5.5.5.2 0.0.0.0
auto-summary
R3#sh run int s0/0
Building configuration...
Current configuration : 217 bytes
!
interface Serial0/0
ip address 10.0.0.3 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 10.0.0.1 301 broadcast
frame-relay map ip 10.0.0.2 301
no frame-relay inverse-arp
end
R3(config-if)#do sh run int tu1
Building configuration...
Current configuration : 120 bytes
!
interface Tunnel1
ip address 5.5.5.2 255.255.255.0
tunnel source Loopback1
tunnel destination 125.125.125.125
end
Happy Studying.....
Best Regards,
Deepak Arora
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