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Configuring a Basic MPLS VPN

j March 08, 2016

It's been a long time I'm away from blogging due to some R&D on the network with Juniper boxes. On this tutorial I'm going to configure very basic MPLS VPN configuration in GNS3. After that we go for EoMPLS configuration.

This is the logical topology for this tutorial.

Here I only post the configuration file from PE other router configuration is almost same. Here is the points should be remember.

1. Make sure IGP with MPLS is configure on PE,P, it shouldn't be configure on customer facing interface.

2. Make sure all loopback interface is reachable.

3. Configure VRF with RD and RT, then applied it on right interface.

4. Configure MP-BGP on PE and peer it.

5. Make sure to redistribute the CE IGP protocol into the BGP and vice versa.

Below command can be copy paste into your router. Before that make sure you had make change necessary things.

Config from PE1

PE1#sh run
Building configuration...

Current configuration : 2126 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname PE1
!
ip cef
ip tcp synwait-time 5
!
!
!
!
ip vrf CustA
rd 100:1
route-target export 1:100
route-target import 1:100
!
no ip domain lookup
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
ip ospf network point-to-point
ip ospf 1 area 0
!
interface FastEthernet0/0
ip address 192.168.11.2 255.255.255.252
ip ospf 1 area 0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip vrf forwarding CustA
ip address 192.168.13.1 255.255.255.252
duplex auto
speed auto
!
!
router eigrp 1
auto-summary
!
address-family ipv4 vrf CustA
redistribute bgp 1 metric 1500 2000 200 100 15000
network 192.168.13.0
no auto-summary
autonomous-system 100
exit-address-family
!
router ospf 1
log-adjacency-changes
!
router bgp 1
no synchronization
bgp log-neighbor-changes
neighbor 3.3.3.3 remote-as 1
neighbor 3.3.3.3 update-source Loopback0
no auto-summary
!
address-family vpnv4
neighbor 3.3.3.3 activate
neighbor 3.3.3.3 send-community both
exit-address-family
!
address-family ipv4 vrf CustA
redistribute eigrp 100
no auto-summary
no synchronization
exit-address-family

=============

CE1#ping 192.168.24.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.24.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/70/92 ms

CE1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     192.168.13.0/30 is subnetted, 1 subnets
C       192.168.13.0 is directly connected, FastEthernet0/1
     192.168.24.0/30 is subnetted, 1 subnets
D       192.168.24.0 [90/307200] via 192.168.13.1, 00:50:22, FastEthernet0/1

Tags # cisco # GNS3 # MPLS Continue Reading

Juniper DHCP Server Configuration

j September 01, 2015

We already configure our QEMU in GNS3 and run our vSRX Router. Now its time to configure DHCP server in our vSRX router. Lets began.
Logical Diagram for this tutorial

To configure DHCP server

Assign Lowest and highest IP range
root# set system services dhcp pool 192.168.1.0/24 address-range low 192.168.1.50 high 192.168.1.200

Assign DNS server (in my case I had used Router interface IP)
root# set system services dhcp pool 192.168.1.0/24 name-server 192.168.1.1

Assign IP address of the router
root# set system services dhcp pool 192.168.1.0/24 router 192.168.1.1

Assign the lease time
root# set system services dhcp pool 192.168.1.0/24 default-lease-time 3600

Assign DHCP as an allowed inbound service for the interface which we are going to enable DHCP.

root# set security zones security-zone untrust interfaces ge-0/0/1 host-inbound-traffic system-services dhcp

Assign IP address to the client faced interface.
root# set interfaces ge-0/0/1 unit 0 family inet address 192.168.1.1/24

Check our client get the IP Address from the server.

How to statically assign IP with fixed MAC address

root#set system service dhcp static-binding 00:50:79:66:68:00 fixed-address 192.168.1.100

PC1>show ip

Request DHCP IP

PC1>dhcp -d

Enjoy

Tags # GNS3 # Juniper # network Continue Reading

vSRX GNS3 QEMU

j September 01, 2015

In this tutorial I'm going to run vSRX JunOS in QEMU and configure it as DHCP Server. Lets began with installing vSRX into QEMU.

I have try vSRX to run into Vbox but never succeeded. So I better to choose QEMU otherwise waste of time.

In my case I had used junos-vsrx-12.1X46-D10.2-domestic to mount into QEMU. Search for it.
Now we have to convert our .vdi file into .image, for that use following command

cd d:\junos\
c:\Program Files\GNS3\qemu\>qemu-img.exe convert -O qcow2 d:\junos\junos-vsrx-12.1X46-D10.2-domestic-disk1.vdi d:\junos\junos-vsrx-12.1X46-D10.2-domestic.img

We just made our image ready to run into QEMU. Go the GNS3

Note: Strongly recommended to use QEMU in linux and enable KVM otherwise it eats up all your CPU and RAM.

-nographic -smp 2 -enable-kvm

>edit>preference>choose "QEMU VMs"
Click on "New" Choose "Default " Gave Name "vSRX" (in my case).