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Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 27
53-1003031-02
MPLS Point-to-Multipoint Traffic Engineering
1
Source-to-leaf sub-LSP
The P2MP LSP topology as observed in Figure 10 consists of multiple point-to-point LSPs that
originate from the source device and terminate at a destination device or a leaf. These LSPs are
known as source-to-leaf (S2L) sub-LSPs. These S2L sub-LSPs can either be signaled in individual
Path and Resv messages, or can be combined into a small number of messages.
NOTE
Brocade devices support only one S2L signaling per Path message and reject Path messages if
there are more than one S2L LSPs from other vendor routers.
Figure 12 indicates three S2L sub-LSPs — S2L1, S2L2, and S2L3, in a P2MP tunnel.
FIGURE 12 P2MP S2L sub-LSPs
- Multi-Service IronWare 1
- Document History 2
- Contents 3
- 53-1003031-02 10
- Chapter 5 IP over MPLS 11
- Chapter 7 Routing over VPLS 16
- About This Document 19
- Supported software 20
- Document conventions 21
- Notice to the reader 22
- Related publications 22
- In this chapter 23
- Overview 25
- How MPLS works 28
- Types of LSPs 31
- MPLS label header encoding 32
- MPLS interfaces 36
- Traffic engineering database 37
- • The link is half duplex 38
- Refresh messages 41
- Admission control 42
- Bandwidth allocation 42
- LSP preemption 43
- P2MP LSP mechanism 48
- Prerequisites and limitations 49
- Scalability limitations 49
- Benefits of P2MP 50
- Source-to-leaf sub-LSP 51
- Grafting 52
- RSVP soft preemption 53
- Frequently used terms 54
- Detailed command information 55
- Display output 56
- Show mpls lsp extensive 57
- Show mpls rsvp session ppend 59
- Show mpls interface 59
- Scalability 60
- Auto-bandwidth for RSVP LSPs 61
- Template-based configuration 66
- Setting the minimum bandwidth 67
- Underflow-limit 68
- • sample-recording 71
- • underflow-limit 71
- Field output Description 73
- Finding a detour at a PLR 85
- Failover sequence 86
- Configuring a protected LSP 88
- Configuring a bypass LSP 88
- • The protected LSP 89
- FIGURE 16 Adaptive bypass LSP 91
- • bandwidth 94
- • exclude-any 94
- • facility-backup 94
- Global Revertiveness 95
- Deleting CSPF groups 101
- node 10.7.7.3 102
- node 10.7.7.8 102
- MPLS CSPF fate-sharing group 106
- Global configuration 107
- Brocade(config-mpls-policy)# 109
- Brocade(config)# router mpls 109
- Brocade(config-mpls)# policy 109
- MPLS enabled interface 110
- VPLS CPU protection 111
- Reverse path forwarding 112
- Port mirroring 112
- Protocol-based VLANs 113
- Class of Service (CoS) 113
- Configuring MPLS 114
- • filter-inter-as-routes 119
- • filter-intra-as-ibgp routes 119
- • RSVP-signaled LSPs 124
- • LDP signaled LSPs 124
- Release Command history 126
- FIGURE 18 Single-hop LSP 128
- Global RSVP parameters 130
- RSVP message authentication 131
- RSVP reliable messaging 132
- RSVP refresh reduction 133
- RSVP IGP synchronization 135
- Limitations 136
- Show command output 137
- Enhanced show commands 138
- Show mpls rsvp igp-sync 138
- Show mpls rsvp igp-sync lsp 140
- Show mpls lsp 142
- Setting up signaled LSPs 148
- Setting up paths 149
- Modifying a path 150
- Deleting a path 150
- Creating an LSP 152
- Specifying the egress LER 152
- Configuring path selection 155
- Assigning a metric to the LSP 159
- LDP tunnel metric 161
- FRR bypass LSPs 163
- Resetting LSPs 164
- Resetting Bypass LSPs 164
- Link protection for FRR 166
- FIGURE 22 Node protection 167
- Command Section 168
- Output field Description 170
- Release Command history 172
- Configuring an adaptive LSP 173
- Reoptimizing LSPs 174
- Static transit LSP 175
- Configuration example 176
- Functional Considerations 177
- Configuration commands 177
- Static-lsp transit 177
- In-label 178
- Next-hop 178
- Out-label 178
- Show Commands 180
- Show mpls label-range 181
- Show mpls summary 182
- Show mpls forwarding 183
- Show mpls config 183
- Show run 184
- Syslog message display output 184
- Specifying a bypass LSP 188
- Reoptimizing a bypass LSP 189
- Dynamic Bypass LSPs 191
- Bypass LSP terminology 192
- Configuration considerations 194
- Creating a dynamic bypass LSP 195
- Configuration steps 197
- Network diagram 197
- Enabling all interfaces 198
- Setting the reoptimizer-timer 200
- Specifying the name prefix 201
- Setting the priority 201
- Configuring non-adaptive LSPs 202
- Setting the reoptimize timer 203
- Show commands 203
- Sample configurations 207
- Supported scenarios 207
- RSVP LSP with FRR 214
- FIGURE 39 220
- Backward compatibility 221
- Commands 222
- Related 226
- IP Traceroute over MPLS 228
- Standard traceroute 229
- Configuration examples 235
- MPLS LDP-IGP synchronization 239
- • Hold down time 244
- • The normal IP metric 245
- This Field... Displays 248
- Displaying MPLS statistics 249
- This field... Displays 250
- LSP test1 254
- LSP test2 254
- Example 257
- CLI parameter Description 260
- • manual 264
- • unconditional 264
- Displaying path information 266
- This column... Displays 267
- • [e 268
- Displaying RSVP information 270
- Displaying the RSVP version 271
- Field Description 272
- • Time stamp 276
- Displaying RSVP statistics 279
- Displaying in the brief mode 287
- Displaying in the detail mode 288
- Transit LSP statistics 291
- Clearing MPLS statistics 294
- Clearing MPLS RSVP sessions 295
- MPLS sample configurations 296
- LSP with redundant paths 296
- Router R1 297
- Router R2 297
- Router R3 298
- Examples of MPLS bypass LSP 307
- • Bypass LSP xmr1-by is up 312
- Syntax: show mpls lsp name 313
- LDP overview 319
- LDP Inbound-FEC filtering 323
- Displaying FEC information 324
- Syntax: show mpls ldp 325
- TABLE 41 326
- Example: 327
- TABLE 42 328
- Sample Configurations 329
- LDP outbound FEC filtering 331
- Command output Description 335
- Label withdrawal delay 350
- Upgrade to R05.5.00 351
- Downgrade from R05.5.00 351
- LDP ECMP for transit LSR 353
- MPLS OAM support for LDP ECMP 355
- LDP ECMP LER 357
- • L – LDP 363
- • R – RSVP 363
- Brocade(config-mpls)# ldp 370
- LDP message authentication 373
- Resetting LDP neighbors 374
- LDP Graceful Restart (GR) 384
- Graceful restart procedure 385
- Graceful restart scenarios 387
- LDP ECMP (transit only) 388
- LDP over RSVP (transit only) 388
- LDP over GRE (transit only) 388
- LDP GR configuration examples 389
- Setting the keepalive timeout 390
- Background 392
- Enabling LDP over RSVP 395
- Enabling TTL propagation 399
- RSVP-TE Hello 400
- • Hello Message 401
- • Hello REQUEST object 401
- • Hello ACK object 401
- Risk assessment 402
- TABLE 46 405
- Field name Description 409
- Description 415
- Field Description 418
- P2MP Capable : Yes 419
- Displaying LDP information 424
- • Targeted 431
- Sample LDP configurations 447
- MPLS over GRE tunnel 451
- LDP LSP over GRE tunnel 452
- LDP VPLS over a GRE tunnel 453
- Router B configuration 456
- Router C configuration 456
- Router D configuration 457
- •lsr-id A.B.C.D 460
- •show mpls ldp 460
- •show mpls ldp fec prefix 460
- Release Modification 463
- Release Command History 464
- How VPLS works 474
- Configuring VPLS instances 477
- Creating a VPLS instance 478
- Specifying VPLS peers 481
- Setting the VPLS VC mode 482
- VPLS raw pass through mode 483
- VPLS tagged mode 488
- QoS for VPLS traffic 490
- LSP load balancing 493
- VPLS LSP load balancing 494
- TABLE 72 497
- Specifying the VPLS VC type 503
- Configuring VPLS tagged mode 504
- Syntax: show mpls vpls detail 505
- CPU packet limiting 509
- Multicast traffic processing 509
- Specifying a VPLS MTU 512
- Special considerations 513
- Enabling MPLS VPLS traps 514
- VPLS extended counters 514
- Local VPLS 517
- CoS behavior for Local VPLS 518
- Displaying VPLS information 520
- VPLS LDP 535
- MTU mismatched 536
- No remote VC label 536
- LDP session down 537
- No local label resource 537
- MPLS LDP show commands 538
- Issues with timers 539
- Solution 539
- Scaling support 540
- How MPLS VLL works 549
- MPLS VLL packet encoding 550
- QoS for VLL traffic 551
- Tag Mode 555
- Outgoing Packet 555
- Raw Mode 555
- Configuring MPLS VLLs 557
- Brocade(config-mpls-vll)# 558
- Specifying a VLL peer 559
- Specifying a VLL endpoint 559
- Specifying a VLL MTU 565
- Generating traps for VLLs 565
- VLL extended counters 567
- Layer 2 ACLs 571
- Sample MPLS VLL configuration 579
- Local VLL 582
- Local VLL QoS 586
- CoS behavior for Local VLL 587
- Configuring Local VLL 588
- Local VLL extended counters 591
- VLL raw-pass-through overview 598
- Packet handling behavior 599
- Customer requirements 601
- Related command Description 603
- IP over MPLS 607
- BGP shortcuts 608
- Examples of next-hop MPLS 609
- • Disabling next-hop MPLS 610
- Specifying metrics 611
- Enable BGP ECMP 611
- Enable next-hop MPLS 612
- Enable LSP-metric comparison 612
- LDP route injection 614
- LDP route injection example 615
- BGP MPLS metric follow IGP 619
- Feature information 620
- Limitation 620
- IS-IS shortcuts 621
- The announce metric 622
- The relative metric 622
- Configuration notes 623
- Configuration tasks 624
- Example configurations 626
- Clearing IS-IS shortcuts 628
- Ignore LSP metric 629
- Show command support 630
- IP over MPLS statistics 634
- Syntax: show mpls ldp traffic 635
- Configuring BGP or MPLS VPNs 637
- What is a BGP or MPLS VPN 639
- BGP or MPLS VPNs 640
- Draft standards 641
- MIB support 641
- BGP or MPLS VPN operation 642
- Configuring BGP VPNs on a PE 644
- Brocade(config)# vrf VPN1 645
- Brocade(config)# 645
- Brocade(config-vrf)# rd 3:6 645
- ECMP forwarding for IP VPN 651
- Setting up LSPs per VRF 653
- Configuring OSPF sham links 654
- Brocade# clear arp vrf blue 657
- (default) 658
- Brocade(config)# vrf blue 660
- Ping VRF 661
- Traceroute VRF 661
- Generating traps for VRFs 662
- BGP4 summary information 665
- Displaying the best routes 680
- BGP VPNv4 attribute entries 694
- Displaying route details 715
- Displaying VRF information 717
- Displaying OSPF sham links 726
- FIGURE 73 IBGP example 733
- EBGP for route exchange 734
- Brocade(config)# router bgp 735
- EBGP to CE network example 736
- CE 1 configuration 736
- CE 5 configuration 736
- PE 1 configuration 737
- PE 4 configuration 738
- Static route to CE example 740
- RIP for route exchange 742
- Brocade(config)# router rip 743
- RIP to CE example 744
- OSPF for route exchange 747
- OSPF to CE example 749
- Cooperative route filtering 752
- OSPF sham links 757
- PE 2 configuration 758
- Glossary 764
- Routing over VPLS 765
- FIGURE 86 Routing over VPLS 766
- FIGURE 87 766
- Routing over VPLS components 767
- Protocol Support 769
- VE over VPLS sample topology 771
- Configuration Considerations 772
- Migration considerations 772
- Configuring VE over VPLS 773
- VRRP/VRRP-E support 774
- Single homing topology 776
- Dual homing topology 777
- ACL Support for VE over VPLS 778
- Configuration task See 786
- Adding a loopback interface 787
- Enabling VPLS auto-discovery 793
- • All BGP4 neighbors 795
- • A specific neighbor 795
- • A specific peer group 795
- Example configuration 796
- • VPLS auto-discovered peers 799
- Viewing neighbor connections 804
- VPLS LSP Load Balancing 816
- Feature overview 816
- Assumptions and dependencies 817
- CAM2PRAM Data Format 822
- 6PE over MPLS 823
- 6PE over MPLS operation 824
- Configuring 6PE 826
- CE1 configuration 828
- 6PE1 configuration 828
- 6PE2 configuration 829
- CE2 configuration 829
- Displaying 6PE information 830
- Displaying the 6PE summary 838
- Clearing 6PE information 841
- CoS behavior for 6PE packets 842
- 6VPE Routing 843
- Configuring 6VPE 844
- FIGURE 97 6VPE with P router 845
- CE-A1 Configuration 847
- PE-1 Configuration 847
- P- Configuration 848
- PE-2 Configuration 849
- Displaying 6VPE information 850
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