Aruba R9G23A User guide

AOS-CX 10.12.1000 Multicast

Guide

6200, 6300, 6400, 8xxx, 9300, 10000 Switch

Series

Published: August 2023

Edition: 2

|2

Copyright Information

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Contents

Contents 3

About this document 15

Applicable products 15

Latest version available online 15

Command syntax notation conventions 15

About the examples 16

Identifying switch ports and interfaces 17

Identifying modular switch components 18

Multicast overview 19

Multicast protocols 19

Multicast addresses 20

Sub-interface recommendations and limitations 20

Important considerations 20

Internet Group Management Protocol (IGMP) 23

IGMP defaults, protocols, and supported configuration 23

How the IGMP protocol works 23

Considerations when configuring IGMP 24

IGMP configuration task list 25

Enabling or disabling IGMP 25

Specifying the IGMP version 25

Configuring IGMP static groups 26

Configuring IGMP query and response parameters 26

Disabling IGMP 27

Viewing IGMP information 27

IGMP configuration example 28

IGMP commands 29

ip igmp 29

ip igmp apply access-list 31

ip igmp last-member-query-interval 32

ip igmp querier 33

ip igmp querier interval 34

ip igmp querier query-max-response-time 35

ip igmp robustness 36

ip igmp router-alert-check 37

ip igmp static-group 38

ip igmp version 38

ip igmp version strict 39

no ip igmp 40

show ip igmp 41

show ip igmp counters 44

show ip igmp group 45

show ip igmp groups 47

show ip igmp interface 50

show ip igmp interface counters 52

show ip igmp interface group 53

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show ip igmp interface groups 55

show ip igmp interface statistics 57

show ip igmp static-groups 59

show ip igmp statistics 60

IGMP snooping 62

IGMP snooping defaults, protocols, and supported configuration 62

How IGMP snooping works 63

IGMP snooping configuration task list 64

Enabling or disabling IGMP snooping 64

Specifying the IGMP snooping version 64

Configuring IGMP snooping static groups 65

Enabling drop-unknown filters 65

Configuring IGMP snooping fast learn ports globally 65

Configuring IGMP snooping per port filtering 66

Disabling IGMP snooping 66

Viewing IGMP snooping information 67

IGMP snooping commands 67

ip igmp snooping (config mode) 67

ip igmp snooping (interface mode) 69

ip igmp snooping (vlan mode) 71

ip igmp snooping filter unknown mcast 73

show ip igmp snooping 73

MLD snooping 77

MLD snooping global configuration commands 77

ipv6 mld snooping 77

mgmd delayed-refresh timer 78

mgmd querier-offload 79

MLD snooping VLAN configuration commands 79

ipv6 mld snooping 79

ipv6 mld snooping apply access-list 80

ipv6 mld snooping auto vlan 81

ipv6 mld snooping blocked vlan 82

ipv6 mld snooping fastlearn 83

ipv6 mld snooping fastleave vlan 84

ipv6 mld snooping forced fastleave vlan 85

ipv6 mld snooping forward vlan 86

ipv6 mld snooping version 87

ipv6 mld snooping static-group 87

MLD snooping show commands 88

show ipv6 mld snooping 88

show mgmd debug-counters 91

MLD configuration commands for interface VLAN 92

ipv6 mld 92

ipv6 mld apply access-list 92

no ipv6 mld 94

ipv6 mld querier 94

ipv6 mld querier interval 95

ipv6 mld last-member-query-interval 95

ipv6 mld querier query-max-response-time 96

ipv6 mld robustness 97

ipv6 mld static-group 97

ipv6 mld version 98

ipv6 mld version strict 99

MLD show commands for interface VLAN 99

show ipv6 mld 99

MLD configuration commands for interface 103

ipv6 mld 104

ipv6 mld apply access-list 104

no ipv6 mld 105

ipv6 mld querier 106

ipv6 mld querier interval 106

ipv6 mld last-member-query-interval 107

ipv6 mld querier query-max-response-time 108

ipv6 mld robustness 109

ipv6 mld static-group 109

ipv6 mld snooping filter-unknown-mcast 110

ipv6 mld version 111

ipv6 mld version strict 112

Protocol Independent Multicast - Sparse Mode (V4 and V6) 113

Protocol Independent Multicast - Sparse Mode (PIM-SM) overview 113

PIM-SM defaults, protocols, and supported configuration 113

PIM-SM router types 114

How PIM-SM works 116

Enabling/disabling PIM-SM in an interface 118

Configuring PIM-SM options in an interface 119

Viewing PIM information 121

PIM-SM configuration example 123

PIM-SM configuration task list 125

Enabling or disabling PIM globally 125

Configuring join/prune interval 126

Enabling/disabling multicast traffic to SPT 126

Configuring an RP 127

Configuring a BSR 129

Configuring RPF override 131

Removing all PIM-SM related configurations on an interface 131

PIM VSX active-active 131

PIM-SM Active-Active with VSX 133

Use case 1: IPv4 Collapsed Core Scenario 1 141

Access-Switch-1 142

Core VSX Primary Configuration 146

Core VSX Secondary Configuration 148

Edge 1 150

Edge 2 151

Logs 152

Use case 2: IPv4 MSDPconfigurations 158

Core VSX Primary Configuration 159

Core VSX Secondary Configuration 161

Distro VSXPrimary Configuration 163

Distro VSXSecondary Configuration 165

Edge 2 167

Edge Configuration 168

Logs 169

Snooping Switch Configuration 176

Use case 3: 2-Tier IPv4 VSX Configurations 182

Core VSX Primary Configuration 183

Core VSX Secondary Configuration 185

Distro VSXPrimary Configuration 187

Distro VSXSecondary Configuration 189

Edge 2 191

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Edge Configuration 192

Multi-Site-VSX-IPv4 Logs 193

Snooping Switch Configuration 198

Use case 4: IPv6 Collapsed Core Scenario 1 204

Access-Switch-1 205

Core VSX Primary Configuration 209

Core VSX Secondary Configuration 211

Edge 1 213

Edge 2 214

IPv6 Logs 215

Use case 5: IPv6 2 Layer VSX Scenario 2 221

Access-Switch-1 222

Core VSXPrimary Configuration 230

Core VSXSecondary Configuration 232

Distro VSX Primary Configuration 233

Distro VSX Secondary Configuration 235

Edge 1 237

Edge 2 238

IPv6 Multi-Layer VSX Logs 239

PIM-SM commands for IPv4 245

accept-register access-list 245

accept-rp 247

active-active 248

anycast-rp source-directly-connected 249

bfd all-interfaces 250

bsr-candidate bsm-interval 251

bsr-candidate hash-mask-length 252

bsr-candidate priority 253

bsr-candidate source-ip-interface 254

disable 255

enable 255

ip multicast boundary 256

ip mroute 258

ip pim-sparse 259

ip pim-sparse bfd 260

ip pim-sparse bsr-boundary 261

ip pim-sparse dr-priority 262

ip pim-sparse hello-delay 263

ip pim-sparse hello-interval 265

ip pim-sparse ip-addr 266

ip pim-sparse lan-prune-delay 267

ip pim-sparse override-interval 268

ip pim-sparse propagation-delay 269

join-prune-interval 270

multicast-route-limit 271

no ip pim-sparse 272

register-rate-limit 273

register-source 274

router pim 275

rp-address access list 282

rp-address 284

rp-candidate group-prefix 285

rp-candidate hold-time 286

rp-candidate priority 287

rp-candidate source-ip-interface 288

rpf-override 289

show ip mroute 290

show ip mroute brief 292

show ip mroute group-addr 293

show ip multicast anomalies 294

show ip multicast boundary interface 296

show ip pim 297

show ip pim bsr 298

show ip pim bsr elected 300

show ip pim bsr local 301

show ip pim interface 302

show ip pim interface interface-name 304

show ip pim interface interface-name counters 306

show ip pim neighbor 309

show ip pim pending 311

show ip pim rp 312

show ip pim rp-candidate 313

show ip pim rp-set 314

show ip pim rp-set learned 316

show ip pim rp-set static 317

show ip pim rpf-override 318

show ip pim rpf-override source 319

sources-per-group 321

spt-threshold 322

PIM-SM commands for IPv6 322

accept-register access-list 323

accept-rp 324

bsr-candidate bsm-interval 325

bsr-candidate hash-mask-length 326

bsr-candidate priority 327

bsr-candidate source-ip-interface 328

disable 329

enable 329

ipv6 mroute 330

ipv6 pim6-sparse 331

ipv6 pim6-sparse bfd 332

ipv6 pim6-sparse dr-priority 334

ipv6 pim6-sparse hello-delay 335

ipv6 pim6-sparse hello-interval 336

ipv6 pim6-sparse ipv6-addr 337

ipv6 pim6-sparse lan-prune-delay 338

ipv6 pim6-sparse override-interval 339

ipv6 pim6-sparse propagation-delay 340

join-prune-interval 341

no ipv6 pim6-sparse 342

register-source 343

router pim6 344

rp-address access list 345

rp-address 346

rp-candidate group-prefix 348

rp-candidate hold-time 348

rp-candidate priority 349

rp-candidate source-ip-interface 350

rpf-override 352

show ipv6 mroute <GROUP-ADDR> 353

show ipv6 mroute 354

show ipv6 mroute brief 356

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show ipv6 pim6 357

show ipv6 pim6 bsr 358

show ipv6 pim6 bsr elected 360

show ipv6 pim6 bsr local 361

show ipv6 pim6 interface <INTERFACE-NAME> 362

show ipv6 pim6 interface 363

show ipv6 pim6 neighbor 364

show ipv6 pim6 pending 366

show ipv6 pim6 rp 367

show ipv6 pim6 rp-candidate 369

show ipv6 pim6 rpf-override 370

show ipv6 pim6 rpf-override source 371

show ipv6 pim6 rp-set 372

show ipv6 pim6 rp-set learned 374

show ipv6 pim6 rp-set static 375

sources-per-group 376

spt-threshold 377

Debugging and Troubleshooting 378

FAQ and best practices 386

Protocol Independent Multicast - Dense Mode (V4 and V6) 389

Protocol Independent Multicast - Dense Mode (PIM-DM) overview 389

PIM-DM defaults, protocols, and supported configurations 389

PIM-DM configuration example 390

PIM-DM features 391

PIM-DM commands for IPv4 392

disable 392

enable 393

ip pim-dense 393

ip pim-dense bfd 394

ip pim-dense graft-retry-interval 396

ip pim-dense hello-delay 397

ip pim-dense hello-interval 398

ip pim-dense ip-addr 399

ip pim-dense lan-prune-delay 400

ip pim-dense max-graft-retries 401

ip pim-dense override-interval 403

ip pim-dense propagation-delay 404

ip pim-dense ttl-threshold 405

router pim 406

show ip mroute 413

show ip mroute group-addr 415

show ip mroute brief 417

show ip pim 418

show ip pim interface 419

show ip pim interface interface-name 420

show ip pim interface interface-name counters 421

show ip pim neighbor 422

show ip pim rpf 424

state-refresh-interval 426

PIM-DM commands for IPv6 427

disable 427

enable 427

ipv6 pim6-dense 428

ipv6 pim6-dense bfd 429

ipv6 pim6-dense graft-retry-interval 430

ipv6 pim6-dense hello-delay 432

ipv6 pim6-dense hello-interval 433

ipv6 pim6-dense ipv6-addr 434

ipv6 pim6-dense lan-prune-delay 435

ipv6 pim6-dense max-graft-retries 436

ipv6 pim6-dense override-interval 437

ipv6 pim6-dense propagation-delay 439

ipv6 pim6-dense ttl-threshold 440

no ipv6 pim6-dense 441

show ipv6 pim6 442

show ipv6 pim6 interface 443

show ipv6 pim6 interface <INTERFACE-NAME> 444

show ipv6 mroute 445

show ipv6 mroute brief 447

show ipv6 mroute <GROUP-ADDR> 448

show ipv6 pim6 neighbor 450

show ipv6 pim6 rpf 452

router pim6 454

state-refresh-interval 455

Protocol Independent Multicast - Source-Specific Multicast 457

Protocol and feature details 457

Supported platforms and standards 457

Configuration examples 458

PIM-SSM IPv4 configurations 458

PIM-SSM IPv6 configurations 459

Considerations and best practices 461

Use case 462

PIM-SSM commands 462

ip igmp apply ssm-map access-list 462

show ip igmp ssm-map 464

PIM-SSM commands for IPv4 465

pim-ssm 465

pim-ssm range-access-list 467

show ip mroute 468

show ip multicast summary 469

show ip pim interface interface-name counters 471

PIM-SSM commands for IPv6 474

ipv6 mld apply ssm-map access-list 474

pim-ssm 476

pim-ssm range-access-list 477

show ipv6 mld ssm-map 478

show ipv6 mroute 479

show ipv6 pim interface counters 481

Debugging and troubleshooting 483

Multicast Source Discovery Protocol (MSDP) 488

Multicast Source Discovery Protocol (MSDP) overview 488

MSDP router config commands 488

disable 488

enable 489

router msdp 490

sa-interval 491

sa-limit 491

MSDP peer configuration commands 493

connection-retry-interval 493

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connect-source 494

clear ip msdp peer statistics 495

description 496

disable 496

enable (ip msdp peer) 497

ip msdp peer 498

keepalive 499

mesh-group 500

passwordn (router msdp) 501

sa-filter access-list 502

MSDP show commands 503

show ip msdp count 503

show ip msdp peer 504

show ip msdp sa-cache 506

show ip msdp summary 507

mDNS gateway 508

mDNS gateway overview 508

Configuring mDNS gateway 509

mDNS gateway commands 510

debug mdns 510

description 511

id 512

mdns-sd 512

mdns-sd apply-profile tx 513

mdns-sd enable 514

mdns-sd profile 515

mdns-sd service 516

clear mdns-sd statistics 517

sequence-number 517

show mdns-sd service-entries 519

show mdns-sd statistics 520

show mdns-sd statistics profile 521

show mdns-sd summary 522

show running-config interface 522

show running-config mdns-sd profile 523

show running-config mdns-sd service 524

Single fabric Multicast VXLAN (V4 and V6) 526

Protocol and feature details 527

Broadcast, unknown unicast, multicast (BUM) traffic replication 527

Overlay multicast support 527

L2 multicast over VXLAN 527

L2 multicast over VXLAN enabled with IGMP or MLD snooping 528

Split horizon and L2 multicast 529

VSX and L2 multicast 529

Recommended configuration on the VSX VTEPs 532

IGMP or MLD querier positioning 533

L3 multicast over VXLAN 533

Centralized L3 gateway 533

Distributed L3 gateways 534

Border VTEP to external (non overlay) network 536

VSX and L3 Multicast 537

VSX Border VTEP with L3 connectivity to external (non overlay) network 537

RP placement and election 542

EVPN VXLAN distributed anycast gateway 542

Designated router priorities 543

Supported platforms and standards 543

Scale 544

Supported RFCs and standards 544

Configuration task list 544

Multicast VXLAN and EVPN 544

VSX VTEP 544

IGMP/MLD snooping 545

PIM/PIM6 and IGMP/MLD on SVI with source and receivers 545

Static RP on VTEP 546

Overlay BSR/RP on VTEP 547

EVPN VXLAN distributed anycast gateway configuration 548

Considerations and best practices 549

Use cases 550

Use case 1: Campus network with centralized L3 gateway 550

Edge 552

Core-vsx-primary 556

Core-vsx-secondary 569

8320-vsx-pri 581

8320-vsx-sec 583

6300-VSF-VTEP1 585

6300-VTEP2 596

Use case 2: DC network with distributed L3 gateway 605

Spine01 606

Spine02 608

Leaf01-primary 610

Leaf01-secondary 621

Leaf02 633

8325-border-prim 643

8325-border-sec 655

Edge-primary 667

Edge-secondary 674

Use Case 3: IPv6 VXLAN tunnel source with dual stack IPv4/IPv6 multicast overlay 681

Configuration example for the 8360-Standalone switch: 682

Configuration example for the 8360-BL-Primary switch: 688

Configuration example for the 8360-BL-Secondary switch: 692

Configuration example for the 8400 Core1-Primary switch: 697

Configuration example for the 8400 Core1-Secondary switch: 699

Configuration example for the 6410Agg-Primary switch: 701

Configuration example for the 6410Agg-Secondary switch: 703

Configuration Example for the 6300 standalone VTEP switch: 706

Configuration example for the 6300-VSFVTEP switch: 710

Configuration example for the 6400 access switch: 716

Sample Multicast over VXLAN Config of a VSX Leaf in Symmetric IRB topology 724

Multicast VXLAN commands 727

ip pim-sparse datapath-auto-include 727

ip pim-sparse vsx-virtual-neighbor 728

ipv6 pim6-sparse datapath-auto-include 729

ipv6 pim6-sparse vsx-virtual-neighbor 730

register-source 731

show ip mroute 732

show ip pim neighbor 735

show ipv6 mroute 736

show ipv6 pim6 interface vlan 738

show ipv6 pim6 neighbor 739

IGMP/MLD 742

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PIM-SM 742

PIM-SSM 743

PIM-SSMScenario 744

Core VSX primary 745

Core VSX secondary 750

Distro VSX primary 755

Distro VSXsecondary 756

Edge 757

VTEP 1 758

VTEP 2 762

Debugging and troubleshooting 765

FAQ 775

References 777

Multi-fabric multicast VXLAN 778

Protocol and feature details 781

RPPlacement 781

Caveats 782

Supported platforms and standards 782

Scale 782

Border VTEP extensions 782

Multicast Routing Across Fabrics 783

PIM-SSM 784

Considerations and Best Practices 784

Use Cases 784

Use case 1: one fabric per site (PIM-SM) 784

Site-1-Access-vtep-1 785

Site-1-Access-vtep-2 790

Site-1-Border-vtep-primary 792

Site-1-Border-vtep-secondary 801

Site-1-External-router 808

Site-2-Access-vtep-1 812

Site-2-Access-vtep-2 817

Site-2-Border-vtep-primary 819

Site-2-Border-vtep-secondary 826

Use case 2: multiple fabrics per site (PIM-SM) 834

Site-1-Access-vtep-1 835

Site-1-Border-vtep-primary 840

Site-1-Border-vtep-secondary 849

Site-1-Distro-vsx-primary 857

Site-1-Distro-vsx-secondary 859

Site-1-External-router 861

Site-2-Access-vtep-1 864

Site-2-Access-vtep-2 869

Site-2-Border-vtep-primary 874

Site-2-Border-vtep-secondary 883

Site-2-Distro-vsx-primary 892

Site-2-Distro-vsx-secondary 894

Site-2-External-router 895

Site-3-Access-vtep-1 899

Site-3-Access-vtep-2 901

Site-3-Border-vtep-primary 903

Site-3-Border-vtep-secondary 912

Use case 3: one fabric per site (PIM-SSM) 919

Site-1-Access-vtep-1 920

Site-1-Access-vtep-2 926

Site-1-Border-vtep-Primary 930

Site-1-Border-vtep-Secondary 943

Site-1-External-router 955

Site-2-Access-vtep-1 959

Site-2-Access-vtep-2 964

Site-2-Border-vtep-Primary 968

Site-2-Border-vtep-Secondary 978

Use case 4: multiple fabrics per site (PIM-SSM) 990

Site-1-Access-vtep-1 990

Site-1-Border-vtep-Primary 994

Site-1-Border-vtep-Secondary 1003

Site-1-Distro-vsx-primary 1012

Site-1-Distro-vsx-secondary 1013

Site-1-External-router 1015

Site-2-Access-vtep-1 1018

Site-2-Access-vtep-2 1023

Site-2-Border-vtep-Primary 1028

Site-2-Border-vtep-Secondary 1038

Site-2-Distro-vsx-primary 1048

Site-2-Distro-vsx-secondary 1049

Site-2-External-router 1051

Site-3-Access-vtep-1 1053

Site-3-Access-vtep-2 1056

Site-3-Border-vtep-Primary 1059

Site-3-Border-vtep-Secondary 1066

Multicast VXLAN Multi-fabric commands 1074

show ip mroute detail 1074

Debugging and Troubleshooting 1077

Check underlay network reachability and VXLAN tunnel between VTEPs 1077

Verify split-horizon rules are disabled at the Border VTEP 1077

Validate PIMNeighbors at the Border VTEP 1078

Validate MRoutes at the Border VTEP 1078

Site-A Border VTEP 1078

Site-B Border VTEP 1079

Multicast receivers not receiving traffic 1079

Troubleshooting from the reciver designated VTEP (DR) 1079

Checking the RPfor the affected flow 1079

Checking if the VTEP has a reverse path to reach RP or Multicast Source 1080

Troubleshooting once the RPFNeighbor towards theRP/Source is found 1081

Verify if the Source DR has successfully registered the flow with RP 1081

Troubleshooting Source DR registration issues with RP 1082

Troubleshooting RP, RP-Set and BSRElection issues 1083

Troubleshooting multicast on a Two site Multi-fabric topology. 1084

Frequently Asked Questions 1088

Multicast routing and bridging 1090

Supported platforms and standards 1090

Multicast datapath commands for IPv4 1090

show ip multicast bridging datapath 1090

show ip multicast routing datapath 1092

Multicast datapath commands for IPv6 1093

show ipv6 multicast bridging datapath 1093

show ipv6 multicast routing datapath 1095

Static routes 1098

Protocol and Feature Details 1098

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Contents |14

Deployments 1099

Supported platforms and standards 1102

Standards 1102

Static multicast scenarios 1102

Scenario 1: Traffic is dropped due to {S, G} preferrence over {*, G} 1102

Scenario 2: Traffic is duplicated due to {S, G} and {*, G} from different

upstreams 1103

PIM +Static without redistribution 1105

PIM +Static with redistribution 1107

ECMP downstream 1128

ECMP upstream with static multicast routes 1128

ECMP upstream with PIM 1129

ECMP downstream with summary route as backup 1130

Inter-operability 1131

Arbitration with PIM 1131

Redistribution with PIM 1131

Considerations and Best Practices 1133

Use cases 1134

Use case 1: SSDP enabled networks 1134

Use case 2:Fixed channel subscription scenarios 1134

Use case 3:IP video surveillance 1135

Use case 4:Precision time protocol 1135

Use case configuration 1135

PIM and static ANYredistribute distroVSX 1136

End-to-end static, no PIM 1148

Hybrid mode with PIM 1160

PIM and static ANYredistribute distroVSX 1174

PIM and static SGredistribute coreVSX 1186

PIM and static SGredistribute DistroVSX 1215

Static Route commands 1236

ip multicast-static-route 1237

ip multicast-static-route (l3vni) 1239

ipv6 multicast-static-route 1240

ipv6 multicast-static-route (l3vni) 1242

redistribute static 1243

show capacities multicast static route 1245

show ip multicast-static-route 1246

show ip multicast-static-route detail 1247

show ip multicast-static-route (group) 1248

show ipv6 multicast-static-route 1251

show ipv6 multicast-static-route detail 1253

show ipv6 multicast-static-route (group) 1254

show running-config 1255

Debugging and Troubleshooting 1256

Frequently Asked Questions 1259

Support and Other Resources 1261

Accessing Aruba Support 1261

Accessing Updates 1262

Aruba Support Portal 1262

My Networking 1262

Warranty Information 1262

Regulatory Information 1262

Documentation Feedback 1263

Chapter 1

About this document

This document describes features of the AOS-CX network operating system. It is intended for

administrators responsible for installing, configuring, and managing Aruba switches on a network.

Applicable products

This document applies to the following products:

nAruba 6200 Switch Series (JL724A, JL725A, JL726A, JL727A, JL728A, R8Q67A, R8Q68A, R8Q69A, R8Q70A,

R8Q71A, R8V08A, R8V09A, R8V10A, R8V11A, R8V12A, R8Q72A)

nAruba 6300 Switch Series (JL658A, JL659A, JL660A, JL661A, JL662A, JL663A, JL664A, JL665A, JL666A,

JL667A, JL668A, JL762A, R8S89A, R8S90A, R8S91A, R8S92A)

nAruba 6400 Switch Series (R0X31A, R0X38B, R0X38C, R0X39B, R0X39C, R0X40B, R0X40C, R0X41A,

R0X41C, R0X42A, R0X42C, R0X43A, R0X43C, R0X44A, R0X44C, R0X45A, R0X45C, R0X26A, R0X27A,

JL741A)

nAruba 8100 Switch Series (R9W94A, R9W95A, R9W96A, R9W97A)

nAruba 8320 Switch Series (JL479A, JL579A, JL581A)

nAruba 8325 Switch Series (JL624A, JL625A, JL626A, JL627A)

nAruba 8360 Switch Series (JL700A, JL701A, JL702A, JL703A, JL706A, JL707A, JL708A, JL709A, JL710A,

JL711A, JL700C, JL701C, JL702C, JL703C, JL706C, JL707C, JL708C, JL709C, JL710C, JL711C, JL704C, JL705C,

JL719C, JL718C, JL717C, JL720C, JL722C, JL721C )

nAruba 8400 Switch Series (JL366A, JL363A, JL687A)

nAruba 9300 Switch Series (R9A29A, R9A30A, R8Z96A)

nAruba 10000 Switch Series (R8P13A, R8P14A)

Latest version available online

Updates to this document can occur after initial publication. For the latest versions of product

documentation, see the links provided in Support and Other Resources.

Command syntax notation conventions

Convention Usage

example-text Identifies commands and their options and operands, code examples,

filenames, pathnames, and output displayed in a command window. Items

that appear like the example text in the previous column are to be entered

exactly as shown and are required unless enclosed in brackets ([ ]).

example-text In code and screen examples, indicates text entered by a user.

Any of the following: Identifies a placeholder—such as a parameter or a variable—that you must

AOS-CX 10.12.1000 Multicast Guide | (6200, 6300, 6400, 8xxx, 9300, 10000 Switch Series) 15

About this document |16

Convention Usage

n<example-text>

nexample-text

substitute with an actual value in a command or in code:

nFor output formats where italic text cannot be displayed, variables

are enclosed in angle brackets (< >). Substitute the text—including

the enclosing angle brackets—with an actual value.

nFor output formats where italic text can be displayed, variables

might or might not be enclosed in angle brackets. Substitute the

text including the enclosing angle brackets, if any, with an actual

value.

|Vertical bar. A logical OR that separates multiple items from which you can

choose only one.

Any spaces that are on either side of the vertical bar are included for

readability and are not a required part of the command syntax.

{ } Braces. Indicates that at least one of the enclosed items is required.

[ ] Brackets. Indicates that the enclosed item or items are optional.

…or

...

Ellipsis:

nIn code and screen examples, a vertical or horizontal ellipsis indicates an

omission of information.

nIn syntax using brackets and braces, an ellipsis indicates items that can be

repeated. When an item followed by ellipses is enclosed in brackets, zero

or more items can be specified.

About the examples

Examples in this document are representative and might not match your particular switch or

environment.

The slot and port numbers in this document are for illustration only and might be unavailable on your

switch.

Understanding the CLI prompts

When illustrating the prompts in the command line interface (CLI), this document uses the generic term

switch, instead of the host name of the switch. For example:

switch>

The CLI prompt indicates the current command context. For example:

switch>

Indicates the operator command context.

switch#

Indicates the manager command context.

switch(CONTEXT-NAME)#

Indicates the configuration context for a feature. For example:

switch(config-if)#

Identifies the interface context.

Variable information in CLI prompts

In certain configuration contexts, the prompt may include variable information. For example, when in

the VLAN configuration context, a VLAN number appears in the prompt:

switch(config-vlan-100)#

When referring to this context, this document uses the syntax:

switch(config-vlan-<VLAN-ID>)#

Where <VLAN-ID> is a variable representing the VLAN number.

Identifying switch ports and interfaces

Physical ports on the switch and their corresponding logical software interfaces are identified using the

format:

member/slot/port

On the 6200 Switch Series

nmember: Member number of the switch in a Virtual Switching Framework (VSF) stack. Range: 1 to 8.

The primary switch is always member 1. If the switch is not a member of a VSF stack, then member is

1.

nslot: Always 1. This is not a modular switch, so there are no slots.

nport: Physical number of a port on the switch.

For example, the logical interface 1/1/4 in software is associated with physical port 4 in slot 1 on

member 1.

On the 6300 Switch Series

nmember: Member number of the switch in a Virtual Switching Framework (VSF) stack. Range: 1 to 10.

The primary switch is always member 1. If the switch is not a member of a VSF stack, then member is

1.

nslot: Always 1. This is not a modular switch, so there are no slots.

nport: Physical number of a port on the switch.

For example, the logical interface 1/1/4 in software is associated with physical port 4 on member 1.

On the 6400 Switch Series

nmember: Always 1. VSF is not supported on this switch.

nslot: Specifies physical location of a module in the switch chassis.

oManagement modules are on the front of the switch in slots 1/1 and 1/2.

oLine modules are on the front of the switch starting in slot 1/3.

nport: Physical number of a port on a line module.

For example, the logical interface 1/3/4 in software is associated with physical port 4 in slot 3 on

member 1.

On the 83xx, 9300, and 10000 Switch Series

nmember: Always 1. VSF is not supported on this switch.

nslot: Always 1. This is not a modular switch, so there are no slots.

nport: Physical number of a port on the switch.

For example, the logical interface 1/1/4 in software is associated with physical port 4 on the switch.

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About this document |18

If using breakout cables, the port designation changes to x:y, where x is the physical port and y is the lane when

split to 4 x 10G or 4 x 25G. For example, the logical interface 1/1/4:2 in software is associated with lane 2 on

physical port 4 in slot 1 on member 1.

On the 8400 Switch Series

nmember: Always 1. VSF is not supported on this switch.

nslot: Specifies physical location of a module in the switch chassis.

oManagement modules are on the front of the switch in slots 1/5 and 1/6.

oLine modules are on the front of the switch in slots 1/1 through 1/4, and 1/7 through 1/10.

nport: Physical number of a port on a line module

For example, the logical interface 1/1/4 in software is associated with physical port 4 in slot 1 on

member 1.

Identifying modular switch components

nPower supplies are on the front of the switch behind the bezel above the management modules.

Power supplies are labeled in software in the format: member/power supply:

omember: 1.

opower supply: 1 to 4.

nFans are on the rear of the switch and are labeled in software as: member/tray/fan:

omember: 1.

otray: 1 to 4.

ofan: 1 to 4.

nFabric modules are not labeled on the switch but are labeled in software in the format:

member/module:

omember: 1.

omember: 1 or 2.

nThe display module on the rear of the switch is not labeled with a member or slot number.

Chapter 2

Multicast overview

Multicast addressing allows one-to-many or many-to-many communication among hosts on a network.

Typical applications of multicast communication include: audio and video streaming, desktop

conferencing, collaborative computing, and similar applications.

In a network where IP multicast traffic is transmitted for multimedia applications, such traffic is blocked

at routed interface (VLAN) boundaries unless a multicast routing protocol is running. Protocol

Independent Multicast (PIM) is a family of routing protocols that form multicast trees to forward traffic

from multicast sources to subnets that have used a protocol such as IGMP to request the traffic. PIM

relies on the unicast routing tables created by any of several unicast routing protocols to identify the

path back to a multicast source (Reverse Path Forwarding, or RPF). With this information, PIM sets up the

distribution tree for the multicast traffic. IGMP provides the multicast traffic link between a host and a

multicast router running PIM-SM. Both PIM-SM and IGMP must be enabled on VLANs whose member

ports have directly connected hosts with a valid need to join multicast groups.

IGMP snooping (Internet Group Management Protocol controls) can be configured per-VLAN basis to

reduce unnecessary bandwidth usage. In the factory default state (IGMP and IGMP snooping disabled),

the switch simply floods all IP multicast traffic it receives on a given VLAN through all ports on that VLAN

(except the port on which it received the traffic). This can result in significant and unnecessary

bandwidth usage in networks where IP multicast traffic is a factor. Enabling IGMP allows the ports to

detect IGMP queries and report packets and manage IP multicast traffic through the switch. IGMP will be

configured on the hosts, and multicast traffic will be generated by one or more servers (inside or outside

of the local network). Switches in the network (that support IGMP snooping) can then be configured to

direct the multicast traffic to only the ports where needed. If multiple VLANs are configured, you can

configure IGMP snooping on a per-VLAN basis.

Multicast Listener Discovery (MLD) is an IPv6 protocol used on a local link for multicast group

management. MLD snooping is a subset of the MLD protocol that operates at the port level and

conserves network bandwidth by reducing the flooding of multicast IPv6 packets.

Static multicast routes can be configured in bridge mode to prevent traffic from being routed from one interface

to another without impacting CPU usage by multicast daemons. If a multicast deployment is using ACLs or

policies to block traffic for specific groups or sources, and a static multicast route is also configured to drop or

allow traffic along with these policies, traffic will be forwarded/routed only if both the static multicast route and

the policy are configured to allow traffic. If one or more of these are configured to drop the traffic, traffic will be

dropped.

Multicast protocols

Layer 3 multicast protocols include:

nIGMP (Internet Group Management Protocol) for last-hop multicast group management. Current RFCs

include:

oIGMPv2 (RFC 2236)

oIGMPv3 (RFC 3376)

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Multicast overview |20

nPIM (Protocol Independent Multicast) for intra-domain multicast routing.

oPIM-SM (Sparse mode) (RFC 4601)

oPIM-DM (Dense mode) (RFC 3973)

oBSR (Bootstrap router) (RFC 5059)

nMSDP (Multicast Source Discovery Protocol) (RFC 3618)

nMLD (Multicast Listener Discovery) v1 and v2

oMLD v1 - RFC 2710

oMLD v2 - RFC 3810

Layer 2 multicast protocol:

nIGMP snooping for IPv4 multicast filtering.

nMLD snooping for IPv6 multicast filtering.

Multicast addresses

Each multicast host group is identified by a single IP address in the range of 224.0.0.0 through

239.255.255.255.

nFor the 8320 and 8325 switch: AOS-CX supports 4K IPv4 multicast flows.

nFor the 10000 switch:AOS-CX supports 4K IPv4 multicast flows.

nFor the 9300 switch:AOS-CX supports 4K IPv4 multicast flows.

nFor the 8400 switch: AOS-CX supports 16K IPv4 multicast flows.

nFor the 6400/6300 switch: AOS-CX supports 4K IPv4 multicast flows.

nFor the 6200 switch: AOS-CX supports 1K IPv4 multicast flows.

For a list of all reserved and well known multicast addresses, see the standards document at the

following links:

nhttps://www.iana.org/assignments/multicast-addresses/multicast-addresses.xhtml

nhttps://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xhtml

Sub-interface recommendations and limitations

(Supported only on the Aruba 6300, 6400, 8100, 8325, 8360 and 10000 Switch Series.)

The following recommendations and limitations apply:

nWhen ROP/sub-interface as uplink is used towards multicast source, a PIM-enabled point-to-point

transit VLAN over ISL between VSX devices should be added to ensure an alternate path to reach the

upstream multicast source. This transit VLAN is not carried on VSX LAGs. (A dedicated point-to-point

link between VSX primary and secondary can also be used.)

nIf KA is used for the P2P sub-interface link, KA has to be in a different VRF.

nBFD is not supported on sub-interfaces.

nIn case of PIMv6 configuration, ensure that the 802.1Q VLANID and SVI VLANID are different. If both

the VLAN IDs are same, then the neighborship will not be formed correctly. This is applicable only for

8325 and 10000 Switch Series.

Important considerations

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