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[suongxuongnui]

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[dangquangminh]

lab MPLS



Bài Lab này mô tả cách hoạt động của cơ chế Multi-Protocol Lable Switching trong hệ thống, sử dụng giao thức ldp (label discovery Protocol) hỗ trợ trong việc xây dựng và phân phối thông tin label giữa các router.

A) Cấu hình ban đầu:

Xây dựnng hệ thống như hình vẽ và đặt địa chỉ IP ban đầu cho toàn hệ thống

Saigon1#sh run
Building configuration...

Current configuration : 949 bytes
!
version 12.2
!
hostname Saigon1
!
ip subnet-zero
!
no ip domain lookup
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface Ethernet0/0
ip address 10.10.10.1 255.255.255.0
half-duplex
!
interface Ethernet0/1
ip address 172.16.1.1 255.255.255.0
half-duplex
!
router eigrp 1
passive-interface Ethernet0/1
passive-interface Loopback0
network 1.0.0.0
network 10.0.0.0
network 172.16.1.0
no auto-summary
!
ip http server
ip classless
!
!
line con 0
line aux 0
line vty 0 4
!
end

Saigon2#sh run
Building configuration...

Current configuration : 910 bytes
!
version 12.2
!
hostname Saigon2
!
ip subnet-zero
!
no ip domain lookup
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0
!
interface Ethernet0/0
ip address 10.10.10.2 255.255.255.0
half-duplex
!
interface Serial0/0
ip address 192.1.1.2 255.255.255.0
clockrate 64000
no fair-queue
!
router eigrp 1
passive-interface Loopback0
network 2.0.0.0
network 10.0.0.0
network 192.1.1.0
no auto-summary
!
ip http server
ip classless
!
line con 0
line aux 0
line vty 0 4
!
end

Saigon3#sh run
Building configuration...

Current configuration : 881 bytes
!
version 12.2
!
hostname Saigon3
!
ip subnet-zero
!
no ip domain lookup
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Serial0/0
ip address 192.1.1.1 255.255.255.0
no fair-queue
!
router eigrp 1
passive-interface Loopback0
network 3.0.0.0
network 192.1.1.0
no auto-summary
!
ip http server
ip classless
!
line con 0
line aux 0
line vty 0 4
!
End



Kiểm tra thông tin bảng routing trên từng router:



Saigon1#sh ip route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets
C 1.1.1.1 is directly connected, Loopback0
2.0.0.0/24 is subnetted, 1 subnets
D 2.2.2.0 [90/409600] via 10.10.10.2, 00:02:06, Ethernet0/0
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/2323456] via 10.10.10.2, 00:01:54, Ethernet0/0
172.16.0.0/24 is subnetted, 1 subnets
C 172.16.1.0 is directly connected, Ethernet0/1
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.10.0 is directly connected, Ethernet0/0
D 192.1.1.0/24 [90/2195456] via 10.10.10.2, 00:02:08, Ethernet0/0

Saigon2#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets
D 1.1.1.1 [90/409600] via 10.10.10.1, 00:02:54, Ethernet0/0
2.0.0.0/24 is subnetted, 1 subnets
C 2.2.2.0 is directly connected, Loopback0
3.0.0.0/32 is subnetted, 1 subnets
D 3.3.3.3 [90/2297856] via 192.1.1.1, 00:02:40, Serial0/0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/307200] via 10.10.10.1, 00:00:49, Ethernet0/0
10.0.0.0/24 is subnetted, 1 subnets
C 10.10.10.0 is directly connected, Ethernet0/0
C 192.1.1.0/24 is directly connected, Serial0/0

Saigon3#sh ip route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets
D 1.1.1.1 [90/2323456] via 192.1.1.2, 00:02:50, Serial0/0
2.0.0.0/24 is subnetted, 1 subnets
D 2.2.2.0 [90/2297856] via 192.1.1.2, 00:02:50, Serial0/0
3.0.0.0/32 is subnetted, 1 subnets
C 3.3.3.3 is directly connected, Loopback0
172.16.0.0/24 is subnetted, 1 subnets
D 172.16.1.0 [90/2221056] via 192.1.1.2, 00:00:58, Serial0/0
10.0.0.0/24 is subnetted, 1 subnets
D 10.10.10.0 [90/2195456] via 192.1.1.2, 00:02:50, Serial0/0
C 192.1.1.0/24 is directly connected, Serial0/0



B) Cấu hình MPLS

B.1 ) Bước đầu tiên cho việc cấu hình MPLS là bật chức năng ip cef trên các router tham gia

Saigon1(config)#ip cef

Saigon2(config)#ip cef

Saigon3(config)#ip cef

B.2 ) Chọn LDP là giao thức gán và phân phối label trên toàn hệ thống, có thể dùng TDP thay thế LDP.

Saigon1(config)#mpls label protocol ?
ldp Use LDP
tdp Use TDP (default)

Saigon1(config)#mpls label protocol ldp

Saigon2(config)#mpls label protocol ?
ldp Use LDP
tdp Use TDP (default)

Saigon2(config)#mpls label protocol ldp

Saigon3(config)#mpls label protocol ?
ldp Use LDP
tdp Use TDP (default)

Saigon3(config)#mpls label protocol ldp

B.3) Bật cơ chế MPLS trên những cổng tương ứng trên toàn hệ thống

Saigon1(config)#int e0/0
Saigon1(config-if)#mpls ip
Saigon1(config-if)#end

Saigon2(config)#int e0/0
Saigon2(config-if)#mpls ip
Saigon2(config-if)#end

Saigon2(config)#int s0/0
Saigon2(config-if)#mpls ip
Saigon2(config-if)#end

Saigon3(config)#int s0/0
Saigon3(config-if)#mpls ip
Saigon3(config-if)#end

C) Kiểm tra thông tin cấu hình:

Saigon1#sh mpls interfaces
Interface IP Tunnel Operational
Ethernet0/0 Yes (ldp) No Yes

Saigon1#sh mpls ldp discovery
Local LDP Identifier:
1.1.1.1:0
Discovery Sources:
Interfaces:
Ethernet0/0 (ldp): xmit/recv
LDP Id: 2.2.2.2:0

Saigon1#sh mpls interfaces detail
Interface Ethernet0/0:
IP labeling enabled (ldp)
LSP Tunnel labeling not enabled
BGP tagging not enabled
Tagging operational
Fast Switching Vectors:
IP to MPLS Fast Switching Vector
MPLS Turbo Vector
MTU = 1500

Saigon1#sh mpls ldp neighbor
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0
TCP connection: 2.2.2.2.11000 - 1.1.1.1.646
State: Oper; Msgs sent/rcvd: 34/33; Downstream
Up time: 00:21:44
LDP discovery sources:
Ethernet0/0, Src IP addr: 10.10.10.2
Addresses bound to peer LDP Ident:
10.10.10.2 192.1.1.2 2.2.2.2

Saigon1#sh mpls ldp neighbor detail
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0
TCP connection: 2.2.2.2.11000 - 1.1.1.1.646
State: Oper; Msgs sent/rcvd: 34/33; Downstream; Last TIB rev sent 12
Up time: 00:21:49; UID: 1; Peer Id 0;
LDP discovery sources:
Ethernet0/0; Src IP addr: 10.10.10.2
holdtime: 15000 ms, hello interval: 5000 ms
Addresses bound to peer LDP Ident:
10.10.10.2 192.1.1.2 2.2.2.2
Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab

Saigon1#sh mpls ldp bindings
tib entry: 1.1.1.1/32, rev 2
local binding: tag: imp-null
remote binding: tsr: 2.2.2.2:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 16
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 3.3.3.3/32, rev 6
local binding: tag: 17
remote binding: tsr: 2.2.2.2:0, tag: 17
tib entry: 10.10.10.0/24, rev 10
local binding: tag: imp-null
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 172.16.1.0/24, rev 8
local binding: tag: imp-null
remote binding: tsr: 2.2.2.2:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: 18
remote binding: tsr: 2.2.2.2:0, tag: imp-null

Saigon1#sh mpls ldp bindings detail
tib entry: 1.1.1.1/32, rev 2
local binding: tag: imp-null
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 16
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 3.3.3.3/32, rev 6
local binding: tag: 17
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 17
tib entry: 10.10.10.0/24, rev 10
local binding: tag: imp-null
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 172.16.1.0/24, rev 8
local binding: tag: imp-null
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: 18
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
Saigon1#

Saigon1#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 2.2.2.0/24 0 Et0/0 10.10.10.2
17 17 3.3.3.3/32 0 Et0/0 10.10.10.2
18 Pop tag 192.1.1.0/24 0 Et0/0 10.10.10.2
Saigon1#
Saigon1#

Saigon1#sh mpls forwarding-table detail
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 2.2.2.0/24 0 Et0/0 10.10.10.2
MAC/Encaps=14/14, MRU=1504, Tag Stack{}
0009E8C52AC00002B93EB1808847
No output feature configured
Per-packet load-sharing
17 17 3.3.3.3/32 0 Et0/0 10.10.10.2
MAC/Encaps=14/18, MRU=1500, Tag Stack{17}
0009E8C52AC00002B93EB1808847 00011000
No output feature configured
Per-packet load-sharing
18 Pop tag 192.1.1.0/24 0 Et0/0 10.10.10.2
MAC/Encaps=14/14, MRU=1504, Tag Stack{}
0009E8C52AC00002B93EB1808847
No output feature configured
Per-packet load-sharing
Saigon1#

Saigon2#sh mpls interfaces
Interface IP Tunnel Operational
Ethernet0/0 Yes (ldp) No Yes
Serial0/0 Yes (ldp) No Yes
Saigon2#

Saigon2#sh mpls ldp discovery
Local LDP Identifier:
2.2.2.2:0
Discovery Sources:
Interfaces:
Ethernet0/0 (ldp): xmit/recv
LDP Id: 1.1.1.1:0
Serial0/0 (ldp): xmit/recv
LDP Id: 3.3.3.3:0

Saigon2#sh mpls interfaces detail
Interface Ethernet0/0:
IP labeling enabled (ldp)
LSP Tunnel labeling not enabled
BGP tagging not enabled
Tagging operational
Fast Switching Vectors:
IP to MPLS Fast Switching Vector
MPLS Turbo Vector
MTU = 1500
Interface Serial0/0:
IP labeling enabled (ldp)
LSP Tunnel labeling not enabled
BGP tagging not enabled
Tagging operational
Fast Switching Vectors:
IP to MPLS Fast Switching Vector
MPLS Turbo Vector
MTU = 1500
Saigon2#

Saigon2#sh mpls ldp neighbor
Peer LDP Ident: 1.1.1.1:0; Local LDP Ident 2.2.2.2:0
TCP connection: 1.1.1.1.646 - 2.2.2.2.11000
State: Oper; Msgs sent/rcvd: 33/34; Downstream
Up time: 00:22:03
LDP discovery sources:
Ethernet0/0, Src IP addr: 10.10.10.1
Addresses bound to peer LDP Ident:
10.10.10.1 1.1.1.1 172.16.1.1
Peer LDP Ident: 3.3.3.3:0; Local LDP Ident 2.2.2.2:0
TCP connection: 3.3.3.3.11001 - 2.2.2.2.646
State: Oper; Msgs sent/rcvd: 11/12; Downstream
Up time: 00:02:42
LDP discovery sources:
Serial0/0, Src IP addr: 192.1.1.1
Addresses bound to peer LDP Ident:
192.1.1.1 3.3.3.3

Saigon2#sh mpls ldp neighbor detail
Peer LDP Ident: 1.1.1.1:0; Local LDP Ident 2.2.2.2:0
TCP connection: 1.1.1.1.646 - 2.2.2.2.11000
State: Oper; Msgs sent/rcvd: 33/34; Downstream; Last TIB rev sent 12
Up time: 00:22:07; UID: 1; Peer Id 0;
LDP discovery sources:
Ethernet0/0; Src IP addr: 10.10.10.1
holdtime: 15000 ms, hello interval: 5000 ms
Addresses bound to peer LDP Ident:
10.10.10.1 1.1.1.1 172.16.1.1
Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab
Peer LDP Ident: 3.3.3.3:0; Local LDP Ident 2.2.2.2:0
TCP connection: 3.3.3.3.11001 - 2.2.2.2.646
State: Oper; Msgs sent/rcvd: 12/12; Downstream; Last TIB rev sent 12
Up time: 00:02:46; UID: 2; Peer Id 1;
LDP discovery sources:
Serial0/0; Src IP addr: 192.1.1.1
holdtime: 15000 ms, hello interval: 5000 ms
Addresses bound to peer LDP Ident:
192.1.1.1 3.3.3.3
Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab
Saigon2#

Saigon2#sh mpls ldp bindings
tib entry: 1.1.1.1/32, rev 2
local binding: tag: 16
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: imp-null
remote binding: tsr: 1.1.1.1:0, tag: 16
remote binding: tsr: 3.3.3.3:0, tag: 17
tib entry: 3.3.3.3/32, rev 6
local binding: tag: 17
remote binding: tsr: 1.1.1.1:0, tag: 17
remote binding: tsr: 3.3.3.3:0, tag: imp-null
tib entry: 10.10.10.0/24, rev 10
local binding: tag: imp-null
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 19
tib entry: 172.16.1.0/24, rev 8
local binding: tag: 18
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: imp-null
remote binding: tsr: 1.1.1.1:0, tag: 18
remote binding: tsr: 3.3.3.3:0, tag: imp-null
Saigon2#sh mpls ldp bindings de
Saigon2#sh mpls ldp bindings detail
tib entry: 1.1.1.1/32, rev 2
local binding: tag: 16
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: imp-null
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: 16
remote binding: tsr: 3.3.3.3:0, tag: 17
tib entry: 3.3.3.3/32, rev 6
local binding: tag: 17
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: 17
remote binding: tsr: 3.3.3.3:0, tag: imp-null
tib entry: 10.10.10.0/24, rev 10
local binding: tag: imp-null
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 19
tib entry: 172.16.1.0/24, rev 8
local binding: tag: 18
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: imp-null
remote binding: tsr: 3.3.3.3:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: imp-null
Advertised to:
1.1.1.1:0 3.3.3.3:0
remote binding: tsr: 1.1.1.1:0, tag: 18
remote binding: tsr: 3.3.3.3:0, tag: imp-null
Saigon2#

Saigon2#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 1.1.1.1/32 0 Et0/0 10.10.10.1
17 Pop tag 3.3.3.3/32 712 Se0/0 point2point
18 Pop tag 172.16.1.0/24 0 Et0/0 10.10.10.1

Saigon2#sh mpls forwarding-table detail
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 Pop tag 1.1.1.1/32 0 Et0/0 10.10.10.1
MAC/Encaps=14/14, MRU=1504, Tag Stack{}
0002B93EB1800009E8C52AC08847
No output feature configured
Per-packet load-sharing
17 Pop tag 3.3.3.3/32 712 Se0/0 point2point
MAC/Encaps=4/4, MRU=1504, Tag Stack{}
0F008847
No output feature configured
Per-packet load-sharing
18 Pop tag 172.16.1.0/24 0 Et0/0 10.10.10.1
MAC/Encaps=14/14, MRU=1504, Tag Stack{}
0002B93EB1800009E8C52AC08847
No output feature configured
Per-packet load-sharing
Saigon2#

Saigon3#sh mpls interfaces
Interface IP Tunnel Operational
Serial0/0 Yes (ldp) No Yes

Saigon3#sh mpls ldp discovery
Local LDP Identifier:
3.3.3.3:0
Discovery Sources:
Interfaces:
Serial0/0 (ldp): xmit/recv
LDP Id: 2.2.2.2:0
Saigon3#

Saigon3#sh mpls interfaces de
Saigon3#sh mpls interfaces detail
Interface Serial0/0:
IP labeling enabled (ldp)
LSP Tunnel labeling not enabled
BGP tagging not enabled
Tagging operational
Fast Switching Vectors:
IP to MPLS Fast Switching Vector
MPLS Turbo Vector
MTU = 1500

Saigon3#sh mpls ldp neighbor
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 3.3.3.3:0
TCP connection: 2.2.2.2.646 - 3.3.3.3.11001
State: Oper; Msgs sent/rcvd: 12/12; Downstream
Up time: 00:02:57
LDP discovery sources:
Serial0/0, Src IP addr: 192.1.1.2
Addresses bound to peer LDP Ident:
10.10.10.2 192.1.1.2 2.2.2.2

Saigon3#sh mpls ldp neighbor detail
Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 3.3.3.3:0
TCP connection: 2.2.2.2.646 - 3.3.3.3.11001
State: Oper; Msgs sent/rcvd: 12/12; Downstream; Last TIB rev sent 12
Up time: 00:03:00; UID: 1; Peer Id 0;
LDP discovery sources:
Serial0/0; Src IP addr: 192.1.1.2
holdtime: 15000 ms, hello interval: 5000 ms
Addresses bound to peer LDP Ident:
10.10.10.2 192.1.1.2 2.2.2.2
Peer holdtime: 180000 ms; KA interval: 60000 ms; Peer state: estab
Saigon3#

Saigon3#sh mpls ldp bindings
tib entry: 1.1.1.1/32, rev 2
local binding: tag: 16
remote binding: tsr: 2.2.2.2:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 17
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 3.3.3.3/32, rev 6
local binding: tag: imp-null
remote binding: tsr: 2.2.2.2:0, tag: 17
tib entry: 10.10.10.0/24, rev 10
local binding: tag: 19
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 172.16.1.0/24, rev 8
local binding: tag: 18
remote binding: tsr: 2.2.2.2:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: imp-null
remote binding: tsr: 2.2.2.2:0, tag: imp-null

Saigon3#sh mpls ldp bindings detail
tib entry: 1.1.1.1/32, rev 2
local binding: tag: 16
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 16
tib entry: 2.2.2.0/24, rev 4
local binding: tag: 17
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 3.3.3.3/32, rev 6
local binding: tag: imp-null
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 17
tib entry: 10.10.10.0/24, rev 10
local binding: tag: 19
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
tib entry: 172.16.1.0/24, rev 8
local binding: tag: 18
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: 18
tib entry: 192.1.1.0/24, rev 12
local binding: tag: imp-null
Advertised to:
2.2.2.2:0
remote binding: tsr: 2.2.2.2:0, tag: imp-null
Saigon3#

Saigon3#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 16 1.1.1.1/32 0 Se0/0 point2point
17 Pop tag 2.2.2.0/24 0 Se0/0 point2point
18 18 172.16.1.0/24 0 Se0/0 point2point
19 Pop tag 10.10.10.0/24 0 Se0/0 point2point
Saigon3#
Saigon3#sh mpls forwarding-table de
Saigon3#sh mpls forwarding-table detail
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 16 1.1.1.1/32 0 Se0/0 point2point
MAC/Encaps=4/8, MRU=1500, Tag Stack{16}
0F008847 00010000
No output feature configured
Per-packet load-sharing
17 Pop tag 2.2.2.0/24 0 Se0/0 point2point
MAC/Encaps=4/4, MRU=1504, Tag Stack{}
0F008847
No output feature configured
Per-packet load-sharing
18 18 172.16.1.0/24 0 Se0/0 point2point
MAC/Encaps=4/8, MRU=1500, Tag Stack{18}
0F008847 00012000
No output feature configured
Per-packet load-sharing
19 Pop tag 10.10.10.0/24 0 Se0/0 point2point
MAC/Encaps=4/4, MRU=1504, Tag Stack{}
0F008847
No output feature configured
Per-packet load-sharing
Saigon3#

Kiểm tra kết nối

Saigon1#traceroute 3.3.3.3

Type escape sequence to abort.
Tracing the route to 3.3.3.3

1 sg2 (10.10.10.2) [MPLS: Label 17 Exp 0] 0 msec 0 msec 4 msec
2 sg3 (192.1.1.1) 16 msec * 12 msec

Cấu hình cuối cùng của hệ thống:

Saigon1#sh run
Building configuration...

Current configuration : 1077 bytes
!
version 12.2
!
no service password-encryption
!
hostname Saigon1
!
logging queue-limit 100
!
ip subnet-zero
!
no ip domain lookup
ip host sg3 192.1.1.1
ip host sg2 10.10.10.2
!
ip cef
mpls label protocol ldp
mpls ldp logging neighbor-changes
!
!
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface Ethernet0/0
ip address 10.10.10.1 255.255.255.0
half-duplex
tag-switching ip
!
!
interface Ethernet0/1
ip address 172.16.1.1 255.255.255.0
half-duplex
no keepalive
!
router eigrp 1
passive-interface Ethernet0/1
passive-interface Loopback0
network 1.0.0.0
network 10.0.0.0
network 172.16.0.0
no auto-summary
!
ip http server
ip classless
!
line con 0
line aux 0
line vty 0 4
!
end

Saigon2#sh run
Building configuration...

Current configuration : 977 bytes
!
version 12.2
no service password-encryption
!
hostname Saigon2
!
ip subnet-zero
!
no ip domain lookup
!
ip cef
mpls label protocol ldp
mpls ldp logging neighbor-changes
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0
!
interface Ethernet0/0
ip address 10.10.10.2 255.255.255.0
half-duplex
tag-switching ip
!
interface Serial0/0
ip address 192.1.1.2 255.255.255.0
tag-switching ip
clockrate 64000
no fair-queue
!
router eigrp 1
passive-interface Loopback0
network 2.0.0.0
network 10.0.0.0
network 192.1.1.0
no auto-summary
!
ip http server
ip classless
!
line con 0
line aux 0
line vty 0 4
!
end

Saigon3#sh run
Building configuration...

Current configuration : 930 bytes
!
version 12.2
no service password-encryption
!
hostname Saigon3
!
ip subnet-zero
!
no ip domain lookup
!
ip cef
mpls label protocol ldp
mpls ldp logging neighbor-changes
!
!
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Serial0/0
ip address 192.1.1.1 255.255.255.0
tag-switching ip
no fair-queue
!
router eigrp 1
passive-interface Loopback0
network 3.0.0.0
network 192.1.1.0
no auto-summary
!
ip http server
ip classless
!
line con 0
line aux 0
line vty 0 4
!
!
end

[hhd1986]

Dear Mr. Minh,

Theo e cấu hình MPLS cấn thêm phần đặt lại giá trị jumbo-mtu vì các gói tin MPLS có max-size lên đến 9198.

[Mr.LeVy]

Dear Mr. Minh,

Theo e cấu hình MPLS cấn thêm phần đặt lại giá trị jumbo-mtu vì các gói tin MPLS có max-size lên đến 9198.

Hi, Size của MPLS packet = size IP packet + n*4 : n = number of label.
Nên MPLS max-size là bao nhiêu trong thực tế thì có thể dễ dàng trả lời rồi

Khi cấu hình MPLS trong backbone, một vấn đề cần phải xem xét là MTU, MTU trong BB bao giờ cũng lớn hơn MTU phía edge. Vì khi router kiểm tra thấy MPLS packet lớn hơn MTU cho phép thì sẽ drop packet chứ ko fragment như IP packet.

Chú ý một trường hợp đặc biệt khi giá trị MTU=1500 thì router cho phép MTU MPLS có thể lên đến 1504 hay 1508 (check lại).

Ví dụ
CE - 1500 - PE1 - 2000 -PE2

Khi đó có thể cấu hình MTU MPLS trên PE1 hay PE2 từ 1504 -2000. Thêm một vấn đề nữa là khi cấu hình dot1q-tunnel trong network vì vậy tốt nhất nên check cẩn thận MTU trước khi chuyển từ IP network sang MPLS network. Thông thường n >=3.

[silverhead]

Hi, Size của MPLS packet = size IP packet + n*4 : n = number of label.
Nên MPLS max-size là bao nhiêu trong thực tế thì có thể dễ dàng trả lời rồi

Khi cấu hình MPLS trong backbone, một vấn đề cần phải xem xét là MTU, MTU trong BB bao giờ cũng lớn hơn MTU phía edge. Vì khi router kiểm tra thấy MPLS packet lớn hơn MTU cho phép thì sẽ drop packet chứ ko fragment như IP packet.

Chú ý một trường hợp đặc biệt khi giá trị MTU=1500 thì router cho phép MTU MPLS có thể lên đến 1504 hay 1508 (check lại).

Ví dụ
CE - 1500 - PE1 - 2000 -PE2

Khi đó có thể cấu hình MTU MPLS trên PE1 hay PE2 từ 1504 -2000. Thêm một vấn đề nữa là khi cấu hình dot1q-tunnel trong network vì vậy tốt nhất nên check cẩn thận MTU trước khi chuyển từ IP network sang MPLS network. Thông thường n >=3.

BẠn có tài liệu nào nói về vấn đề này ko cho mình xin với (địa chỉ mail của mình là : silverhead04@yahoo.com).
Có 1 vấn đề xin hỏi các bạn, cơ quan mình hiện nay thuê VPN (dịch vụ MegaWAN của VTN), hiện nay co quan tôi muốn kiểm tra các thông số : throughput, Delay, Packet loss, Jitter, ... Bạn nào có giải pháp hay bài đo cho mình xin với. Cảm ơn nhiều.

[susudad]

Xin chào thầy dangquangminh,
Bài lab MPLS thầy đã hướng dẫn rất có ích cho vấn đề đang cần giải quyết của em.
Nhưng em không nhìn thấy hình vẽ topo của bài lab như thầy đã đề cập "Xây dựnng hệ thống như hình vẽ" là ở đâu ạ.
Xin phép thầy post lại hình được không ạ.
Cảm ơn thầy rất nhiều.

[dangquangminh]

Gửi bạn susu thêm 2 bài lab MPLS nằm trong chương trình ISCW:

MPLS Frame Mode
http://rapidshare.com/files/15574393...lab_4_1_en.pdf

MPLS VPN
http://rapidshare.com/files/15574419...lab_4_2_en.pdf

[susudad]

Cám ơn thầy Minh rất nhiều về 2 bài lab MPLS.
Nó rất có ích cho vấn đề đang cần giải quyết của em.