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Showing posts from July, 2011

Step By Step MPLS – Basic MPLS Setup

Initial configuration , very basic with no MPLS, connectivity only to directly connected interfaces.R1R2R3R4!
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 10.0.31.1 255.255.255.0
duplex auto
speed auto
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
ip address 10.0.42.2 255.255.255.0
duplex auto
speed auto
!
!
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
no clns route-cache
!
interface FastEthernet0/0
ip address 10.0.31.3 255.255.255.0
duplex auto
speed auto
  no clns route-cache
!
interface Serial1/0
ip address 10.0.43.3 255.255.255.0
  serial restart-delay 0
no clns route-cache
!
!
!
interface Loopback0
ip address 4.4.4.4 255.255.255.255
no clns route-cache
!
interface FastEthernet0/0
ip address 10.0.42.4 255.255.255.0
duplex auto
speed auto
!
interface Serial1/0
ip address 10.0.43.4 255.255.255.0
  serial restart-delay 0
no clns route-cache
!
adding to the following configuration MPLS labels we will start wi…

Step by Step Into MPLS – VRF LITE

Although VRF (virtual routing and forwarding) is not actually part of the MPLS you can think of the VRF as a helper for the MPLS in achieving the MPLS VPN infrastructure, now as I would like to make that a very simple to understand guide , I will address here only the VRF part without any MPLS, also known as VRF Lite.Simple Topology :R1 ConfigurationR2 Configuration!
ip cef
no ip domain lookup
!
!
ip vrf VRF_GOLD
!
ip vrf VRF_SILVER
!
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interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 100
ip vrf forwarding VRF_SILVER
ip address 10.0.0.1 255.255.255.0
!
interface FastEthernet0/0.2
encapsulation dot1Q 200
ip vrf forwarding VRF_GOLD
ip address 20.0.0.1 255.255.255.0
!
!
ip cef
no ip domain lookup
!
ip vrf VRF_GOLD
!
ip vrf VRF_SILVER
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
!
interface FastEthernet0/0.1
encapsulation dot1Q 100
ip vrf forwarding VRF_SILVER
ip address 10.0.0.2 255.255.255.0
!
interface FastEthernet0/0.2
encapsulation dot1Q 200
i…