예: 노드 링크 보호 구성
그림 1: 노드 링크 보호 토폴로지 다이어그램
그림 1 은 노드 링크 보호를 구현할 수 있는 방법의 예를 보여줍니다. LSP는 라우터 1, 라우터 2, 라우터 3 및 라우터 4를 통과하는 엄격한 경로와 함께 라우터 0에서 시작됩니다. LSP 내에서 노드 링크 보호를 구성하고 경로의 모든 RSVP 인터페이스에서 링크 보호를 구성합니다.
라우터 0에서 라우터 1, 2, 3, 4를 통해 이동하도록 LSP를 구성합니다. LSP에 node-link-protection 명령문을 포함하고 나가는 RSVP 인터페이스에서 fe-0/1/1링크 보호를 구성합니다. LSP를 지원하려면 필요한 인터페이스에서 OSPF, MPLS 및 RSVP를 구성합니다.
라우터 0
[edit]
interfaces {
fe-0/1/1 {
unit 0 {
family inet {
address 10.11.1.10/30;
}
family mpls;
}
}
so-0/0/2 {
unit 0 {
family inet {
address 10.11.1.22/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.220/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/1.0;
interface so-0/0/2.0;
}
traffic-engineering;
}
mpls {
statistics {
file mplsStat.log size 1m;
interval 30;
display-id;
}
traffic-engineering bgp-igp-both-ribs;
traceoptions {
file mpls.log size 5m world-readable;
flag cspf;
flag cspf-link;
flag cspf-node;
flag state;
flag error;
}
explicit-null;
label-switched-path test_r0_r4 {
from 10.255.11.220;
to 10.255.11.215;
node-link-protection; # Apply node-link protection to the LSP.
primary pathP;
}
path pathP {# Define the LSP path across routers 1, 2, 3, and 4.
10.11.1.9 strict;
10.11.1.2 strict;
10.11.2.1 strict;
10.11.2.10 strict;
}
interface fe-0/1/1.0;
interface so-0/0/2.0;
}
rsvp {
traceoptions {
file rsvp.log size 3m files 12 world-readable;
flag event;
flag state;
flag error;
flag packets detail;
}
interface fe-0/1/1.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/2.0;
}
}
Router 1에서 나가는 RSVP 인터페이스에 so-0/0/3. 대한 링크 보호 구성 모든 전송 인터페이스에 OSPF, MPLS 및 RSVP를 구성합니다.
라우터 1
[edit]
interfaces {
fe-0/1/0 {
unit 0 {
family inet {
address 10.11.3.1/30;
}
family mpls;
}
}
fe-2/2/1 {
unit 0 {
family inet {
address 10.11.1.9/30;
}
family mpls;
}
}
so-0/0/3 {
unit 0 {
family inet {
address 10.11.1.1/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.223/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0;
}
rsvp {
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0 {
link-protection; # Apply link protection on all RSVP interfaces in the LSP path.
}
}
}
Router 2에서 발신 RSVP 인터페이스에 so-0/0/0. 대한 링크 보호 구성 모든 전송 인터페이스에 OSPF, MPLS 및 RSVP를 구성합니다.
라우터 2
[edit]
interfaces {
so-0/0/0 {
unit 0 {
family inet {
address 10.11.2.2/30;
}
family mpls;
}
}
so-0/0/2 {
unit 0 {
family inet {
address 10.11.1.21/30;
}
family mpls;
}
}
so-0/0/3 {
unit 0 {
family inet {
address 10.11.1.2/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.218/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface so-0/0/0.0;
interface so-0/0/2.0;
interface so-0/0/3.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface so-0/0/0.0;
interface so-0/0/2.0;
interface so-0/0/3.0;
}
rsvp {
interface so-0/0/0.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/2.0;
interface so-0/0/3.0;
}
}
Router 3에서 발신 RSVP 인터페이스에 fe-0/1/2. 대한 링크 보호 구성 모든 전송 인터페이스에 OSPF, MPLS 및 RSVP를 구성합니다.
라우터 3
[edit]
interfaces {
fe-0/1/0 {
unit 0 {
family inet {
address 10.11.3.2/30;
}
family mpls;
}
}
fe-0/1/2 {
unit 0 {
family inet {
address 10.11.2.9/30;
}
family mpls;
}
}
so-0/0/0 {
unit 0 {
family inet {
address 10.11.2.1/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.216/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/0.0;
interface fe-0/1/2.0;
interface so-0/0/0.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/0.0;
interface fe-0/1/2.0;
interface so-0/0/0.0;
}
rsvp {
interface fe-0/1/0.0;
interface fe-0/1/2.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/0.0;
}
}
라우터 4는 LSP의 엔드포인트이므로 평소와 같이 인터페이스와 프로토콜을 구성할 수 있습니다. 이 라우터에서 노드 링크 보호 또는 링크 보호 문을 구성할 필요가 없습니다.
라우터 4
[edit]
interfaces {
fe-0/1/2 {
unit 0 {
family inet {
address 10.11.2.10/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.215/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/2.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/2.0;
}
rsvp {
interface fe-0/1/2.0;
}
}
작업 확인
MPLS LSP 노드 링크 보호가 제대로 작동하는지 확인하려면 다음 명령을 사용합니다.
show mpls lsp extensiveshow route detailshow rsvp neighbor detailshow rsvp session detail
다음 섹션에서는 구성 예제와 함께 사용된 이러한 명령의 출력을 보여 줍니다.
user@router0> show rsvp session detail
Ingress RSVP: 2 sessions
10.255.11.215
From: 10.255.11.220, LSPstate: Up, ActiveRoute: 5
LSPname: test_r0_r4, LSPpath: Primary
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: 100128
Resv style: 1 SE, Label in: -, Label out: 100128
Time left: -, Since: Thu May 8 13:36:58 2003
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 3 receiver 56517 protocol 0
Node/Link protection desired
Type: Node/Link protected LSP
PATH rcvfrom: localclient
PATH sentto: 10.11.1.9 (fe-0/1/1.0) 20 pkts
RESV rcvfrom: 10.11.1.9 (fe-0/1/1.0) 37 pkts
Explct route: 10.11.1.9 10.11.1.2 10.11.2.1 10.11.2.10
Record route: <self> 10.11.1.9 10.11.1.2 10.11.2.1 10.11.2.10
10.255.11.218
From: 10.255.11.220, LSPstate: Up, ActiveRoute: 0
LSPname: Bypass->10.11.1.9->10.11.1.2 # 2 next hops indicate node-link protection.
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: 0
Resv style: 1 SE, Label in: -, Label out: 0
Time left: -, Since: Thu May 8 13:36:58 2003
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 1 receiver 56521 protocol 0
Type: Bypass LSP
Number of data route tunnel through: 4
Number of RSVP session tunnel through: 0
PATH rcvfrom: localclient
PATH sentto: 10.11.1.21 (so-0/0/2.0) 1 pkts
RESV rcvfrom: 10.11.1.21 (so-0/0/2.0) 1 pkts
Explct route: 10.11.1.21
Record route: <self> 10.11.1.21
Total 2 displayed, Up 2, Down 0
Egress RSVP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit RSVP: 0 sessions
Total 0 displayed, Up 0, Down 0
명령은 show mpls lsp extensive 링크 보호 및 노드 링크 보호에 대한 몇 가지 유용한 정보를 제공합니다. 보호 플래그 항목은 일련의 값을 나타냅니다. 값을 합산하면 총합을 기준으로 LSP의 보호 상태를 학습할 수 있습니다. 플래그의 중요한 값은 1 = 사용 가능(링크 보호), 2 = 사용 중, 8 = 노드 보호입니다. 따라서 값 9는 노드 보호를 사용할 수 있음을 의미하고(1 + 8 = 9) 값 A는 노드 보호 링크가 사용 중임을 의미합니다(8 + 2 = A16진수).
user@router0> show mpls lsp extensive
Ingress LSP: 1 sessions
10.255.11.215
From: 10.255.11.220, State: Up, ActiveRoute: 5, LSPname: test_r0_r4
ActivePath: pathP (primary)
Node/Link protection desired
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary pathP State: Up
OptimizeTimer: 30
Reoptimization in 13 second(s).
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 40)
10.11.1.9 S 10.11.1.2 S 10.11.2.1 S 10.11.2.10 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node):
10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=9 Label=100080) 10.11.2.1(flag=1 Label=100080) 10.11.2.10(Label=0)
67 May 8 13:46:14 CSPF: computation result ignored[18 times]
66 May 8 13:37:31 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=9 Label=100080) 10.11.2.1(flag=1 Label=100080) 10.11.2.10(Label=0)
65 May 8 13:37:28 CSPF: computation result ignored
64 May 8 13:37:07 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=1 Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
63 May 8 13:37:01 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
62 May 8 13:37:01 Link-protection Up
61 May 8 13:36:58 Selected as active path
60 May 8 13:36:58 Record Route: 10.11.1.9(Label=100128) 10.11.1.2(Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
59 May 8 13:36:58 Up
58 May 8 13:36:58 Originate Call
57 May 8 13:36:58 CSPF: computation result accepted
56 May 8 13:36:29 CSPF failed: no route toward 10.11.2.10[10 times]
55 May 8 13:32:04 Clear Call
54 May 8 13:31:40 Deselected as active
53 May 8 13:31:40 Link-protection Down
52 May 8 13:31:40 Down
51 May 8 13:31:36 CSPF failed: no route toward 10.11.2.10[6 times]
50 May 8 13:29:00 10.11.2.1: Session preempted
49 May 8 13:28:42 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100064) 10.11.2.1(Label=100064) 10.11.2.10(Label=0)
48 May 8 13:28:40 CSPF failed: no route toward 10.11.2.10
47 May 8 13:28:35 Link-protection Up
46 May 8 13:28:35 Link-protection Down
45 May 8 13:28:30 Link-protection Up
44 May 8 13:28:30 Link-protection Down
43 May 8 13:28:10 CSPF failed: no route toward 10.11.2.10
42 May 8 13:27:44 Link-protection Up
41 May 8 13:27:44 Link-protection Down
40 May 8 13:27:42 Link-protection Up
39 May 8 13:27:42 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100064) 10.11.2.1(flag=1 Label=100064) 10.11.2.10(Label=0)
38 May 8 13:27:41 CSPF failed: no route toward 10.11.2.10[2 times]
37 May 8 13:27:39 CSPF: link down/deleted 10.11.2.9(eagle.00/10.255.11.216)->0.0.0.0(eagle.04/0.0.0.0)
36 May 8 13:27:39 Link-protection Down
35 May 8 13:27:39 Record Route: 10.11.1.9(Label=100064) 10.11.1.2(Label=100064) 10.11.2.1(Label=100064) 10.11.2.10(Label=0)
34 May 8 13:27:39 CSPF failed: no route toward 10.11.2.10
33 May 8 13:27:39 CSPF: link down/deleted 0.0.0.0(eagle.04/0.0.0.0)->0.0.0.0(papst.00/10.255.11.215)
32 May 8 13:27:12 CSPF: computation result ignored[16 times]
31 May 8 13:19:35 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100048) 10.11.2.1(flag=1 Label=100048) 10.11.2.10(Label=0)
30 May 8 13:19:22 Link-protection Up
29 May 8 13:19:22 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100048) 10.11.2.1(Label=100048) 10.11.2.10(Label=0)
28 May 8 13:19:22 Up
27 May 8 13:19:22 Link-protection Down
26 May 8 13:19:22 CSPF: computation result accepted
25 May 8 13:19:16 Link-protection Up
24 May 8 13:19:16 Link-protection Down
23 May 8 13:18:54 CSPF failed: no route toward 10.11.2.1
22 May 8 13:18:54 CSPF: link down/deleted 0.0.0.0(eagle.04/0.0.0.0)->0.0.0.0(papst.00/10.255.11.215)
21 May 8 13:18:53 CSPF failed: no route toward 10.11.2.1[2 times]
20 May 8 13:18:46 CSPF: link down/deleted 10.11.2.9(eagle.00/10.255.11.216)->0.0.0.0(eagle.04/0.0.0.0)
19 May 8 13:18:35 Record Route: 10.11.1.9(flag=9 Label=100032) 10.11.1.2(flag=9 Label=100032) 10.11.2.1(Label=100016) 10.11.2.10(Label=0)
18 May 8 13:18:35 Record Route: 10.11.1.9(flag=9 Label=100032) 10.11.1.2(Label=100032) 10.11.2.1(Label=100016) 10.11.2.10(Label=0)
Created: Thu May 8 13:13:28 2003
Total 1 displayed, Up 1, Down 0
Egress LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
user@router0> show rsvp neighbor detail
RSVP neighbor: 2 learned
Address: 10.11.1.9 via: fe-0/1/1.0 status: Up
Last changed time: 33:02, Idle: 5 sec, Up cnt: 1, Down cnt: 0
Message received: 130
Hello: sent 221, received: 221, interval: 9 sec
Remote instance: 0x66368e80, Local instance: 0x643f57b5
Refresh reduction: incomplete
Remote end: enabled, Ack-extension: disabled
Address: 10.11.1.21 via: so-0/0/2.0 status: Up
Last changed time: 32:41, Idle: 10 sec, Up cnt: 1, Down cnt: 0
Message received: 78
Hello: sent 218, received: 218, interval: 9 sec
Remote instance: 0x74b57f2a, Local instance: 0x66341d2f
Refresh reduction: operational
Remote end: enabled, Ack-extension: enabled
user@router0> show route 10.255.11.215 detail
inet.0: 33 destinations, 34 routes (31 active, 0 holddown, 2 hidden)
10.255.11.215/32 (2 entries, 1 announced)
State: <FlashAll>
*RSVP Preference: 7
Next hop: 10.11.1.9 via fe-0/1/1.0 weight 1, selected
Label-switched-path test_r0_r4
Label operation: Push 100128, selfID=RSVP-7
Next hop: via so-0/0/2.0 weight 20001
Label-switched-path Bypass->10.11.1.9->10.11.1.2
Label operation: Push 100080, selfID=RSVP-7, parentID=RSVP-8
State: <Active Int>
Local AS: 69
Age: 13:14 Metric: 40
Task: RSVP
Announcement bits (2): 0-KRT 3-Resolve inet.0
AS path: I
IS-IS Preference: 18
Level: 2
Next hop: 10.11.1.9 via fe-0/1/1.0, selected
State: <Int>
Inactive reason: Route Preference
Local AS: 69
Age: 13:20 Metric: 40
Task: IS-IS
AS path: I
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
10.255.11.215/32 (1 entry, 1 announced)
State: <FlashAll>
*RSVP Preference: 7
Next hop: 10.11.1.9 via fe-0/1/1.0 weight 1, selected
Label-switched-path test_r0_r4
Label operation: Push 100128, selfID=RSVP-7
Next hop: via so-0/0/2.0 weight 20001
Label-switched-path Bypass->10.11.1.9->10.11.1.2
Label operation: Push 100080, selfID=RSVP-7, parentID=RSVP-8
State: <Active Int>
Local AS: 69
Age: 13:14 Metric: 40
Task: RSVP
Announcement bits (1): 1-Resolve inet.0
AS path: I