Mpls Çalışma
Routerlar birbirleriyle ospf ile haberleşiyorlar.
R1(config)#mpls label protocol ?
ldp Use LDP (default)
tdp Use TDP
R1(config)#mpls label protocol ldp
R1(config)#mpls ldp router-id loopback 0 // Çünkü loopback adresi advertise ediyoruz
R1(config)#interface serial 5/1
R1(config-if)#mpls ip
R1(config)#mpls label range 100 199
<100-1048575> Maximum label value for dynamic label range
R1#sh mpls interfaces
Interface IP Tunnel BGP Static Operational
Serial5/1 Yes (ldp) No No No Yes
R1#
R2(config)#mpls label range 200 299
R2(config)#mpls label protocol ldp
R2(config)#mpls ldp router-id loopback 0
R2(config)#interface serial 5/0
R2(config-if)#mpls ip
*Dec 31 14:54:16.179: %LDP-5-NBRCHG: LDP Neighbor 11.0.0.1:0 (1) is UP
R2(config)#interface serial 5/1
R2(config-if)#mpls ip
R3(config)#mpls label range 300 399
R3(config)#mpls label protocol ldp
R3(config)#interface serial 5/0
R3(config-if)#mpls ip
*Dec 31 14:57:07.679: %LDP-5-NBRCHG: LDP Neighbor 12.0.0.1:0 (1) is UP
R3(config)#interface serial 5/1
R3(config-if)#mpl
R3(config-if)#mpls ip
R3(config)#mpls ldp router-id loopback 0
R3#sh mpls interfaces
Interface IP Tunnel BGP Static Operational
Serial5/0 Yes (ldp) No No No Yes
Serial5/1 Yes (ldp) No No No Yes
R3#
R4(config)#mpls label range 400 499
R4(config)#mpls label protocol ldp
R4(config)#interface serial 5/0
R4(config-if)#mpls ip
*Dec 31 14:59:40.663: %LDP-5-NBRCHG: LDP Neighbor 13.0.0.1:0 (1) is UP
R4(config-if)#
R4(config)#mpls ldp router-id loopback 0
R2#sh mpls ldp neighbor
Peer LDP Ident: 11.0.0.1:0; Local LDP Ident 12.0.0.1:0
TCP connection: 11.0.0.1.646 - 12.0.0.1.54691
State: Oper; Msgs sent/rcvd: 20/20; Downstream
Up time: 00:08:53
LDP discovery sources:
Serial5/0, Src IP addr: 1.1.1.1
Addresses bound to peer LDP Ident:
1.1.1.1 11.0.0.1
Peer LDP Ident: 13.0.0.1:0; Local LDP Ident 12.0.0.1:0
TCP connection: 13.0.0.1.36364 - 12.0.0.1.646
State: Oper; Msgs sent/rcvd: 16/17; Downstream
Up time: 00:06:01
LDP discovery sources:
Serial5/1, Src IP addr: 2.2.2.2
Addresses bound to peer LDP Ident:
2.2.2.2 3.3.3.1 13.0.0.1
R3#sh mpls ldp neighbor
Peer LDP Ident: 12.0.0.1:0; Local LDP Ident 13.0.0.1:0
TCP connection: 12.0.0.1.646 - 13.0.0.1.36364
State: Oper; Msgs sent/rcvd: 18/18; Downstream
Up time: 00:07:36
LDP discovery sources:
Serial5/0, Src IP addr: 2.2.2.1
Addresses bound to peer LDP Ident:
1.1.1.2 2.2.2.1 12.0.0.1
Peer LDP Ident: 14.0.0.1:0; Local LDP Ident 13.0.0.1:0
TCP connection: 14.0.0.1.20981 - 13.0.0.1.646
State: Oper; Msgs sent/rcvd: 15/15; Downstream
Up time: 00:05:03
LDP discovery sources:
Serial5/1, Src IP addr: 3.3.3.2
Addresses bound to peer LDP Ident:
3.3.3.2 14.0.0.1
R4#sh mpls ldp bindings
lib entry: 1.0.0.0/8, rev 14
local binding: label: 404
remote binding: lsr: 13.0.0.1:0, label: 305
lib entry: 2.0.0.0/8, rev 12
local binding: label: 403
remote binding: lsr: 13.0.0.1:0, label: imp-null
lib entry: 3.0.0.0/8, rev 2
local binding: label: imp-null
remote binding: lsr: 13.0.0.1:0, label: imp-null
lib entry: 11.0.0.1/32, rev 10
local binding: label: 402
remote binding: lsr: 13.0.0.1:0, label: 304
lib entry: 12.0.0.1/32, rev 8
local binding: label: 401
remote binding: lsr: 13.0.0.1:0, label: 303
lib entry: 13.0.0.0/24, rev 15
remote binding: lsr: 13.0.0.1:0, label: imp-null
lib entry: 13.0.0.1/32, rev 6
local binding: label: 400
lib entry: 14.0.0.0/24, rev 4
local binding: label: imp-null
lib entry: 14.0.0.1/32, rev 16
remote binding: lsr: 13.0.0.1:0, label: 302
R4#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
400 No Label 13.0.0.1/32 0 Se5/0 point2point
401 303 12.0.0.1/32 0 Se5/0 point2point
402 304 11.0.0.1/32 0 Se5/0 point2point
403 Pop Label 2.0.0.0/8 0 Se5/0 point2point
404 305 1.0.0.0/8 0 Se5/0 point2point
R4#sh mpls ldp bindings 14.0.0.0 24
lib entry: 14.0.0.0/24, rev 4
local binding: label: imp-null // Direclty connected ise implicit nulldır
Lib==label information base
lfib == label forwarding information base
R1#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
101 205 14.0.0.1/32 0 Se5/1 point2point
102 202 13.0.0.1/32 0 Se5/1 point2point
103 No Label 12.0.0.1/32 0 Se5/1 point2point
104 204 3.0.0.0/8 0 Se5/1 point2point
105 Pop Label 2.0.0.0/8 0 Se5/1 point2point
R1#
R1#trace 14.0.0.1 source 11.0.0.1
Type escape sequence to abort.
Tracing the route to 14.0.0.1
VRF info: (vrf in name/id, vrf out name/id)
1 1.1.1.2 [MPLS: Label 205 Exp 0] 52 msec 104 msec 120 msec
2 2.2.2.2 [MPLS: Label 302 Exp 0] 132 msec 20 msec 32 msec
3 3.3.3.2 52 msec 60 msec 24 msec
R4(config)#mpls ldp explicit-null
R4(config)#exit
R4#sh mpls forwarding-table
Local Outgoing Prefix Bytes Label Outgoing Next Hop
Label Label or Tunnel Id Switched interface
400 No Label 13.0.0.1/32 0 Se5/0 point2point
401 303 12.0.0.1/32 0 Se5/0 point2point
402 304 11.0.0.1/32 0 Se5/0 point2point
403 Pop Label 2.0.0.0/8 0 Se5/0 point2point
404 305 1.0.0.0/8 0 Se5/0 point2point
Show commands
================
sh mpls interfaces
sh mpls ldp neigh
sh run int .....
sh run | inc mpls
VRF(Virtual Routing And Forwarding)
Vrf provides a way for you to configure multiple routing instances on your router. Keep customer traffic and routing separate utilize the same hardware Without VRF we need to use ACL filtering to keep traffic segregated.
VRF Configuration
7000 Serisi Cisco Router
Router(config)#vrf definition ABC
Router(config-vrf)#rd 500:1
Router(config)#address-family ipv4
Router(config-vrf-af)#route-target export 500:1
Router(config-vrf-af)#route-target import 500:1
Router(config-vrf-af)#exit
Router(config-vrf)#address-family ipv6
Router(config-vrf-af)#route-target export 500:1
Router(config-vrf-af)#route-target import 500:1
Router(config-vrf-af)#exit
3600/3700 Serisi
Router(config)#ip vrf vrf-name
Router(config-vrf)#rd route-distinguisher
Router(config-vrf)#route-target export RT
Router(config-vrf)#route-target import RT
R1#sh ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
4.4.4.1 0 FULL/ - 00:00:37 4.4.4.1 Serial5/1
2.2.2.1 0 FULL/ - 00:00:38 1.1.1.2 Serial5/0
R1#sh ip route ospf
Gateway of last resort is not set
O 2.0.0.0/8 [110/128] via 1.1.1.2, 00:43:45, Serial5/0
O 3.0.0.0/8 [110/128] via 4.4.4.1, 00:41:06, Serial5/1
172.16.0.0/16 is variably subnetted, 3 subnets, 2 masks
O 172.16.36.0/24 [110/129] via 4.4.4.1, 00:41:06, Serial5/1
[110/129] via 1.1.1.2, 00:41:57, Serial5/0
R1#
R1#sh mpls ldp neighbor
R1# // hiçbir şey göremedik çünkü loopback adresi ospf de tanıtmadık
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