Browse to the download GNS3 IOU VM.ova file. Open the GNS3 IOU VM.ova file. Be sure there is enough RAM on the PC/Laptops. Select Settings. In the Settgs, ensure Network Adapter 1 is Host-only Adapter on VirtualBox Host-Only Ethernet Adapter. Power on the GNS3 IOU VM. Open GNS3 by right clicking it and choosing “Run as administrator”, insert a cloud node into the topology, right-click select configure. Add the loopback adapter from the configure dialog box of the cloud node. Add a router to the topology, connect one of its ethernet ports to the cloud and start the router.
Gns3 1.3.3 Windows Download
How to configure GRE tunnel between Juniper and Cisco.
Tools/Software Needed:
GNS3 1.3.3
Virtual Box running JUNOS 12.1R1.9 (Olive)
Cisco c2691-adventerprisek9-mz.124-23.image
Configuration:
First we have to configure ISP devices to simulate WAN connectivity across the sites.
ISP1 Configuration
!Enter Privilege and Global Configuration Mode
enable
configure terminal
! Configure the interfaces
interface FastEthernet0/0
ip address 1.1.1.1 255.255.255.252
no shut
exit
interface FastEthernet/1
ip address 2.2.2.1 255.255.255.252
no shut
exit
!End of Interfaces Config
! Configure EIGP as Interior Gateway Protocol to allow communication between fa0/0 to fa0/1.
router eigrp 90
no auto-summary
network 1.1.1.0 0.0.0.3
network 2.2.2.0 0.0.0.3
exit
! Configure BGP as Exterior Gateway Protocol to allow communication between ISP.
router bgp 65000
no auto-summary
neighbor 2.2.2.2 remote-as 65001
neighbor 2.2.2.2 soft-reconfiguration inbound
network 1.1.1.0 mask 255.255.255.252
end
!Save changes to memory
write memory
+++END OF CONFIG FOR ISP1+++
ISP2 Configuration
! Enter Privilege and Global Configuration Mode
enable
configure terminal
! Configure the interfaces
interface fa0/0
ip address 3.3.3.1 255.255.255.252
no shutdown
exit
interface fa0/1
ip address 2.2.2.2 255.255.255.252
no shutdown
exit
!End of Interfaces Config
! Configure OSPF as Interior Gateway Protocol to allow communication between fa0/0 to fa0/1.
router ospf 1
network 2.2.2.0 0.0.0.3 area 0
network 3.3.3.0 0.0.0.3 area 0
exit
! Configure BGP as Exterior Gateway Protocol to allow communication between ISP.
router bgp 65001
no auto-summary
neighbor 2.2.2.1 remote-as 65000
neighbor 2.2.2.1 soft-reconfiguration inbound
network 3.3.3.0 mask 255.255.255.252
end
! Save changes to memory
write memory
+++END OF CONFIG FOR ISP2+++
GRE-Cisco Configuration
! Enter Privilege and Global Configuration Mode
enable
configure terminal
! Configure the interfaces
interface FastEthernet0/0
ip address 3.3.3.2 255.255.255.252
no shut
exit
! Configure Tunnel0 to be used as Generic Route Encapsulation Tunnel
interface Tunnel0
ip address 10.1.1.2 255.255.255.0
tunnel source FastEthernet0/0
tunnel destination 1.1.1.2
ip mtu 1400
keepalive 5
no shut
exit
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! Configure Default Route to ISP-2
ip route 0.0.0.0 0.0.0.0 3.3.3.1
! Save changes to memory
write memory
+++END OF CONFIG FOR GRE-Cisco
GRE-Juniper Configuration
! Enter CLI Mode and Configure Mode
cli
configure
!Configure physical interface
set interfaces em0 unit 0 family inet address 1.1.1.2/30
! Configure Static Route
set routing-options static route 0.0.0.0/0 next-hop 1.1.1.1
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! Configure GRE Tunneling
set interfaces gre unit 1 tunnel source 1.1.1.2 destination 3.3.3.2
! Assign IP to GRE Tunnel
set interfaces gre unit 1 family inet address 10.1.1.1/24
! Set Maximum Transmission Unit for tunnel 0
set interfaces gre unit 1 family inet mtu 1400
+++END OF GRE-Junifer Configuration+++