Multiprotocol Protocol Label Switching

Eksempel på MPLS LER router. (Label Edge Router)

<input>ip cef</input>
!
<input>ip vrf PB
 description Kunde: Pengebanken (PB) i Birksund (BKS) : PB-BKS
 rd 1100:1
 route-target export 1100:1
 route-target import 1100:1</input>
!
<input>ip vrf SF
 description Kunde: Steel Furniture i Birksund
 rd 1000:1
 route-target export 1000:1
 route-target import 1000:1</input>
!
interface Loopback0
 ip address 10.10.10.1 255.255.255.255
 ip router isis 
!
interface FastEthernet0/0
 description Forbindelse til 3550RDB1
 bandwidth 10000
 ip address 192.168.11.1 255.255.255.0
 ip router isis 
 speed 10
 full-duplex
 <input>mpls label protocol ldp
 tag-switching ip</input>
!
interface FastEthernet0/0.100
 description VLAN for Steel Furniture (SF) i Rodborg (RDB)
 bandwidth 2000
 encapsulation dot1Q 100
 <input>ip vrf forwarding SF</input>
 ip address 172.24.0.1 255.255.0.0
 no ip redirects
 no ip proxy-arp
 no snmp trap link-status
!
interface FastEthernet0/0.200
 description VLAN for Pengebanken (PB) i Rodborg (RDB) : PB-RDB
 bandwidth 2000
 encapsulation dot1Q 200
 <input>ip vrf forwarding PB</input>
 ip address 172.28.0.1 255.255.0.0
 no ip redirects
 no ip proxy-arp
 no snmp trap link-status
!
interface Serial0/0
 mtu 1508
 bandwidth 4000
 ip address 192.168.90.1 255.255.255.252
 ip router isis 
 <input>mpls label protocol ldp
 tag-switching ip</input>
!
router isis 
 net 49.0000.0101.3300.1111.00
 is-type level-2-only
 metric-style wide
!
router bgp 65000
 bgp log-neighbor-changes
 neighbor 10.10.10.3 remote-as 65000
 neighbor 10.10.10.3 update-source Loopback0
 !
 address-family ipv4
 neighbor 10.10.10.3 activate
 no auto-summary
 no synchronization
 exit-address-family
 !
 <input>address-family vpnv4
 neighbor 10.10.10.3 activate
 neighbor 10.10.10.3 send-community extended
 exit-address-family</input>
 !
 <input>address-family ipv4 vrf SF
 redistribute connected
 no auto-summary
 no synchronization
 exit-address-family</input>
 !
 <input>address-family ipv4 vrf PB
 redistribute connected
 no auto-summary
 no synchronization
 redistribute static
 exit-address-family</input>
!
<input> ip route vrf PB 172.21.0.0 255.255.0.0 172.28.0.2</input>

Eksempel på LSR Router (Label Switch Router)

<input>ip cef</input>
!
interface Loopback0
 ip address 10.10.10.2 255.255.255.255
 ip router isis 
!
interface Serial0/0
 mtu 1508
 bandwidth 8000
 ip address 192.168.90.5 255.255.255.252
 ip nat inside
 ip router isis 
 <input>mpls label protocol ldp
 tag-switching ip</input>
 clock rate 8000000
!
interface Serial0/1
 mtu 1508
 bandwidth 8000
 ip address 192.168.90.2 255.255.255.252
 ip nat inside
 ip router isis 
 <input>mpls label protocol ldp
 tag-switching ip</input>
 clock rate 8000000
!
router isis 
 net 49.0000.0101.3300.2222.00
 is-type level-2-only
 metric-style wide
 default-information originate
!

Notater

Når to routere laver en LDP session mellem naboer bruges højeste Loopback adresse. Derfor skal naboen kende denne adresse. Brug

R3(config)#<input>mpls ldp router-id loopback 0</input>

Check at LDP til naboen er oppe

R3#<input>sh mpls ldp neighbor</input>
    Peer LDP Ident: 10.1.2.1:0; Local LDP Ident 10.1.5.1:0
        TCP connection: 10.1.2.1.646 - 10.1.5.1.51150
        State: Oper; Msgs sent/rcvd: 1785/1777; Downstream
        Up time: 1d01h
        LDP discovery sources:
          Serial0/0, Src IP addr: 10.1.1.10
        Addresses bound to peer LDP Ident:
          10.1.1.25       10.1.1.10       10.1.2.1