RAR PPPoE IPv6 Multicast

From Cisco IOS XE 17.11.1a, IPv6 multicast configuration is available for PPPoE-based RAR sessions.

Prerequisites

For IPv6 multicast over PPPoE to function properly, the following must be configured:

  • PPPoE (Virtual-template, VMI and physical interface)

  • IPv6 unicast and multicast routing

  • IPv6 PIM BSR

  • IPv6 MLD

Configuring VMI interface and Enabling Multicast Support

Used in router-to-radio communications, the Virtual Multipoint Interface (VMI) interface provides services that map outgoing packets to the appropriate Point-to-Point Protocol over Ethernet (PPPoE) sessions based on the next-hop forwarding address for that packet. The VMI interface also provides a broadcast service that emulates a set of point-to-point connections as a point-to-multipoint interface with broadcast ability. When a packet with a multicast address is forwarded through the VMI interface, VMI replicates the packet and unicasts it to each of its neighbors.

Note
VMI will map outgoing packets to the appropriate PPPoE sessions. It will use the next-hop forwarding address from each outgoing packet to perform this mapping.

Note
VMI is required to have IP addresses assigned for VMI to work even though it will be shown as down/down while in bypass mode. The IPv4 address configured will not be advertised or used. Instead, the IPv4 address on the virtual-template will be used.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 2

interface vmi number

Example:

Router(config)# interface vmi 1

Creates a VMI and enters interface configuration mode.

Step 3

ipv6 enable

Example:

Router(config-if)#ipv6 enable

Enable IPv6 support under VMI interface. OSPFv3 IPv4 needs to have IPv6 support enabled on the interface level.

Step 4

ip address address mask

Example:

Router(config-if)#ip address 71.0.0.1 255.255.255.0

Configures IPv4 address under VMI interface.

Step 5

ipv6 address address/prefix

Example:

Router(config-if)#ipv6 address 71::71/64

Configures IPv6 address under VMI interface.

Step 6

physical-interface interface

Example:

Router(config-if)#physical-interface gigabitEthernet {0/0/0 or 0/0/1 or 0/0/0.1}

Binds the physical interface (the interface connected to the radio client) to the VMI interface, for packet flow.

Step 7

mode name

Example:

Router(config-if)#mode bypass

Do not aggregate Virtual Access Interfaces under VMI. (Must be configured as bypass).

Configuring IPv6 PIM Bootstrap Router (BSR)

The bootstrap router (BSR) protocol for PIM-SM provides a dynamic, adaptive mechanism to distribute group-to-RP mapping information rapidly throughout a domain. With the IPv6 BSR feature, if an RP becomes unreachable, it will be detected and the mapping tables will be modified so that the unreachable RP is no longer used, and the new tables will be rapidly distributed throughout the domain.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 2

ipv6 pim bsr candidate bsr loopback_ipv6_address

Example:

Router(config)# ipv6 pim bsr candidate bsr 11::11

Configures a device to be a candidate BSR.

Note

 
Must use the loopback ipv6 address configured earlier.

Step 3

ipv6 pim bsr candidate rp loopback_ipv6_address

Example:

Router(config-router)#ipv6 pim bsr candidate rp 11::11

Configures a device to be a candidate Rendezvous Point (RP).

Note

 
Must use the loopback ipv6 address configured earlier.

Configuring IPv6 Multicast Group

An IPv6 multicast group is an arbitrary group of receivers that want to receive a particular data stream. This group has no physical or geographical boundaries--receivers can be located anywhere on the Internet or in any private network.

Procedure

  Command or Action Purpose

Step 1

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 2

interface interface_name

Example:

Router# interface Vlan 10

Creates and enters interface configuration mode.

Step 3

ipv6 mld join-group multicast_group_address

Example:

Router(config-if)#ipv6 mld join-group FF06:6::1

Configure IPv6 mld join group under interface.

Verifying BSR Election

This section shows examples of command output to verify your setup.

Router-1#show ipv6 pim bsr election
PIMv2 BSR information

BSR Election Information
  Scope Range List: ff00::/8
  This system is the Bootstrap Router (BSR)
     BSR Address: 61::61
     Uptime: 00:05:20, BSR Priority: 0, Hash mask length: 126
     RPF: FE80::7E31:EFF:FE85:1E78,Loopback0
     BS Timer: 00:00:41
  This system is candidate BSR
      Candidate BSR address: 61::61, priority: 0, hash mask length: 126
Router-1#
Router-2#show ipv6 pim bsr election 
PIMv2 BSR information

BSR Election Information
  Scope Range List: ff00::/8
     BSR Address: 61::61
     Uptime: 00:01:22, BSR Priority: 0, Hash mask length: 126
     RPF: FE80::7E31:EFF:FE85:1E78,Virtual-Access1.1
     BS Timer: 00:01:47
  This system is candidate BSR
      Candidate BSR address: 41::41, priority: 0, hash mask length: 126
Router-2#

Verifying IPv6 Multicast Configuration

This section shows examples of IPv6 multicast ocnfiguration.


Note
“*” in the source address indicates MLD join request entry. 
Router-1#show ipv6 mroute
Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, 
       C - Connected, L - Local, I - Received Source Specific Host Report,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT, Y - Joined MDT-data group,
       y - Sending to MDT-data group
       g - BGP signal originated, G - BGP Signal received,
       N - BGP Shared-Tree Prune received, n - BGP C-Mroute suppressed,
       q - BGP Src-Active originated, Q - BGP Src-Active received
       E - Extranet
Timers: Uptime/Expires
Interface state: Interface, State

(A000::2, FF06:6::1), 00:01:45/00:01:44, flags: SFT
  Incoming interface: Vlan30
  RPF nbr: A000::2
  Immediate Outgoing interface list:
    Virtual-Access1.1, Forward, 00:01:45/00:02:48

Router-1#
Router-2# show ipv6 mroute
Multicast Routing Table
Flags: D - Dense, S - Sparse, B - Bidir Group, s - SSM Group, 
       C - Connected, L - Local, I - Received Source Specific Host Report,
       P - Pruned, R - RP-bit set, F - Register flag, T - SPT-bit set,
       J - Join SPT, Y - Joined MDT-data group,
       y - Sending to MDT-data group
       g - BGP signal originated, G - BGP Signal received,
       N - BGP Shared-Tree Prune received, n - BGP C-Mroute suppressed,
       q - BGP Src-Active originated, Q - BGP Src-Active received
       E - Extranet
Timers: Uptime/Expires
Interface state: Interface, State

(*, FF06:6::1), 00:04:33/00:03:29, RP 41::41, flags: SCL
  Incoming interface: Tunnel2
  RPF nbr: 41::41
  Immediate Outgoing interface list:
    Vlan30, Forward, 00:04:33/00:03:29

(A000::2, FF06:6::1), 00:01:41/00:02:43, flags: ST
  Incoming interface: Virtual-Access1.1
  RPF nbr: FE80::7E31:EFF:FE85:1E78
  Immediate Outgoing interface list:
    Vlan30, Forward, 00:01:41/00:02:49
Router-2

Sample Running Configuration

The following output shows a sample configuration for IPv6 multicast over RAR PPPoE.

Router-1#show run
Building configuration...

Current configuration : 7911 bytes
!
! Last configuration change at 13:04:28 UTC Wed Jun 8 2022
!
version 17.9
service timestamps debug datetime msec
service timestamps log datetime msec
service call-home
platform qfp utilization monitor load 80
platform hardware throughput level 250M
platform punt-keepalive disable-kernel-core
!
hostname Router-1
!
boot-start-marker
boot system flash bootflash:c6300-universalk9.17.09.01.SSA.bin
boot-end-marker
!
!
no logging console
no aaa new-model
!
!
login on-success log
ipv6 unicast-routing
ipv6 multicast-routing
!
!
subscriber templating
subscriber authorization enable
! 
! 
multilink bundle-name authenticated
!
!
crypto pki trustpoint TP-self-signed-4073554590
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-4073554590
 revocation-check none
 rsakeypair TP-self-signed-4073554590
!
crypto pki trustpoint SLA-TrustPoint
 enrollment pkcs12
 revocation-check crl
!
!
crypto pki certificate chain TP-self-signed-4073554590
 certificate self-signed 01
  30820330 30820218 A0030201 02020101 300D0609 2A864886 F70D0101 05050030 
  31312F30 2D060355 04031326 494F532D 53656C66 2D536967 6E65642D 43657274 
  69666963 6174652D 34303733 35353435 3930301E 170D3232 30363038 31313137 
  31345A17 0D333230 36303731 31313731 345A3031 312F302D 06035504 03132649 
  4F532D53 656C662D 5369676E 65642D43 65727469 66696361 74652D34 30373335 
  35343539 30308201 22300D06 092A8648 86F70D01 01010500 0382010F 00308201 
  0A028201 0100C54E 860F73AC F0A9EBC7 2C6D1204 49099324 85989550 32CA9B91 
  3B3A2492 AEA1D550 0CD787DE 09F6B64F 3F01C578 3EFB3995 E448904A 957EAFD9 
  B82EF201 3A28BE26 6B1615DA 35B35BEA D4B7B20F 2D2A3EC2 C1F52281 349E88E5 
  F2BCBA37 CA72D461 97D1E817 7493ED38 7C7C1035 F7231D4E F59FADF9 EE0EE5EE 
  1FD73691 E93EBE8C 262DC8B1 0FA25BF0 C2F65BF9 C57A406A 9F9CF3D3 3E6888C3 
  D6B533AB 0DA71037 6C94A385 CECA4DD9 A037C344 5B761E6D F3B8D47B 4093BED8 
  E497D649 63436773 7BE5A718 331C7F08 31071542 03AE588C 08605CF7 CC7C7D6F 
  967759FC E2A943FF 8AD70094 825AAD4B DC66FEC8 5B7F2CDA 24F148E1 51AF106E 
  FE212C21 651B0203 010001A3 53305130 0F060355 1D130101 FF040530 030101FF 
  301F0603 551D2304 18301680 14F49EA0 C5E78BB1 F0EA55AD 4C580FB7 BF1AE35C 
  50301D06 03551D0E 04160414 F49EA0C5 E78BB1F0 EA55AD4C 580FB7BF 1AE35C50 
  300D0609 2A864886 F70D0101 05050003 82010100 2083EBC1 E760806B 12F0ACEF 
  8FDE2E11 E5B88B62 B85B5835 AB1D2471 EA6FCC2D B28F5EE2 1969C233 DBB8C435 
  D7BAD49C 7781E485 97D5B5D0 DD05A0EE 5352535F 1657BE78 64E6BBA8 B627618E 
  49041DFB 4FE4D16C FA6857EF E6EEDFBC 2E25AF9E 852EDF71 3B65E55F 62AB1B1E 
  8B842F51 DAD55DB5 8A5BF87B 91F540D2 02E8576E 5D4550EA E7FCB6D7 6AD0E92A 
  EEAF7544 01C4095A BB02DB3A D45D73EB 971974FF B5DED058 F2F3A0E1 23BD3441 
  899CDFC2 A3B36E7D E72D4BDB 480B8347 C26D6AB9 E7E5A140 B20B7B1D 7AC24A2C 
  A69124B3 49BF18AF C99EF2A5 C4F484CE 9E2A70C1 D1EA4250 6E0D858E BBCFC6C1 
  4FF6E0BC EB190067 E86EC80D 5D149D6F 462CA857
  	quit
crypto pki certificate chain SLA-TrustPoint
 certificate ca 01
  30820321 30820209 A0030201 02020101 300D0609 2A864886 F70D0101 0B050030 
  32310E30 0C060355 040A1305 43697363 6F312030 1E060355 04031317 43697363 
  6F204C69 63656E73 696E6720 526F6F74 20434130 1E170D31 33303533 30313934 
  3834375A 170D3338 30353330 31393438 34375A30 32310E30 0C060355 040A1305 
  43697363 6F312030 1E060355 04031317 43697363 6F204C69 63656E73 696E6720 
  526F6F74 20434130 82012230 0D06092A 864886F7 0D010101 05000382 010F0030 
  82010A02 82010100 A6BCBD96 131E05F7 145EA72C 2CD686E6 17222EA1 F1EFF64D 
  CBB4C798 212AA147 C655D8D7 9471380D 8711441E 1AAF071A 9CAE6388 8A38E520 
  1C394D78 462EF239 C659F715 B98C0A59 5BBB5CBD 0CFEBEA3 700A8BF7 D8F256EE 
  4AA4E80D DB6FD1C9 60B1FD18 FFC69C96 6FA68957 A2617DE7 104FDC5F EA2956AC 
  7390A3EB 2B5436AD C847A2C5 DAB553EB 69A9A535 58E9F3E3 C0BD23CF 58BD7188 
  68E69491 20F320E7 948E71D7 AE3BCC84 F10684C7 4BC8E00F 539BA42B 42C68BB7 
  C7479096 B4CB2D62 EA2F505D C7B062A4 6811D95B E8250FC4 5D5D5FB8 8F27D191 
  C55F0D76 61F9A4CD 3D992327 A8BB03BD 4E6D7069 7CBADF8B DF5F4368 95135E44 
  DFC7C6CF 04DD7FD1 02030100 01A34230 40300E06 03551D0F 0101FF04 04030201 
  06300F06 03551D13 0101FF04 05300301 01FF301D 0603551D 0E041604 1449DC85 
  4B3D31E5 1B3E6A17 606AF333 3D3B4C73 E8300D06 092A8648 86F70D01 010B0500 
  03820101 00507F24 D3932A66 86025D9F E838AE5C 6D4DF6B0 49631C78 240DA905 
  604EDCDE FF4FED2B 77FC460E CD636FDB DD44681E 3A5673AB 9093D3B1 6C9E3D8B 
  D98987BF E40CBD9E 1AECA0C2 2189BB5C 8FA85686 CD98B646 5575B146 8DFC66A8 
  467A3DF4 4D565700 6ADF0F0D CF835015 3C04FF7C 21E878AC 11BA9CD2 55A9232C 
  7CA7B7E6 C1AF74F6 152E99B7 B1FCF9BB E973DE7F 5BDDEB86 C71E3B49 1765308B 
  5FB0DA06 B92AFE7F 494E8A9E 07B85737 F3A58BE1 1A48A229 C37C1E69 39F08678 
  80DDCD16 D6BACECA EEBC7CF9 8428787B 35202CDC 60E4616A B623CDBD 230E3AFB 
  418616A9 4093E049 4D10AB75 27E86F73 932E35B5 8862FDAE 0275156F 719BB2F0 
  D697DF7F 28
  	quit
!
!
no license feature hseck9
license udi pid ESR-6300-CON-K9 sn FOC234304H3
license boot level network-advantage
memory free low-watermark processor 45135
!
diagnostic bootup level minimal
!
spanning-tree extend system-id
!
!
redundancy
 mode none
!
!
vlan internal allocation policy ascending
!
policy-map type service pppoe_rar
 pppoe service manet_radio
!
!
bba-group pppoe rar_group_1
 virtual-template 1
 service profile pppoe_rar
!
!
interface Loopback0
 ip address 61.0.0.1 255.255.255.255
 ipv6 address 61::61/128
 ipv6 enable
 ospfv3 1 ipv6 area 0
 ospfv3 1 ipv4 area 0
!
interface GigabitEthernet0/0/0
 media-type rj45
 negotiation auto
 ipv6 enable
 pppoe enable group rar_group_1
!
interface GigabitEthernet0/0/1
 no ip address
 shutdown
 negotiation auto
!
interface GigabitEthernet0/1/0
 switchport access vlan 30
!
interface GigabitEthernet0/1/1
!
interface GigabitEthernet0/1/2
!
interface GigabitEthernet0/1/3
!
interface Virtual-Template1
 mtu 1484
 ip unnumbered vmi1
 no ip redirects
 ip tcp adjust-mss 1444
 load-interval 30
 no peer default ip address
 ipv6 enable
 ipv6 mtu 1484
 ospfv3 1 network manet
 ospfv3 1 hello-interval 10
 ospfv3 1 ipv4 area 0
 ospfv3 1 ipv6 area 0
!
interface Vlan1
 no ip address
!
interface Vlan30
 ip address 192.168.10.1 255.255.255.0
 ipv6 address A000::1/64
 ipv6 enable
 ospfv3 1 ipv4 area 0
 ospfv3 1 ipv6 area 0
!
interface Async0/2/0
 no ip address
 encapsulation scada
!
interface vmi1
 ip address 71.0.0.1 255.255.255.0
 ipv6 address FE80::7E31:EFF:FE85:1E78 link-local
 ipv6 address 71::71/64
 ipv6 enable
 physical-interface GigabitEthernet0/0/0
 mode bypass
!
router ospfv3 1
 router-id 101.101.101.101
 !
 address-family ipv4 unicast
  redistribute connected metric 1 metric-type 1
  log-adjacency-changes
 exit-address-family
 !
 address-family ipv6 unicast
  redistribute connected metric-type 1
  log-adjacency-changes
 exit-address-family
!
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
!
!
ipv6 pim bsr candidate bsr 61::61
ipv6 pim bsr candidate rp 61::61
!
!
control-plane
!
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 stopbits 1
line 0/0/0
line 0/2/0
line vty 0 4
 login
 transport input ssh
line vty 5 14
 login
 transport input ssh
!
call-home
 ! If contact email address in call-home is configured as sch-smart-licensing@cisco.com
 ! the email address configured in Cisco Smart License Portal will be used as contact email address to send SCH notifications.
 contact-email-addr sch-smart-licensing@cisco.com
 profile "CiscoTAC-1"
  active
  destination transport-method http
!

end

Debug Commands

This section shows debug commands for PPPoE, VMI, Virtual Template, and Subscriber Service.

PPPoE

Command or Action

Purpose

Router# debug pppoe data

PPPoE data packets

Router# debug pppoe errors

PPPoE protocol errors

Router# debug pppoe events

PPPoE protocol events

Router# debug pppoe packets

PPPoE control packets

VMI

Command or Action

Purpose

Router# debug vmi bma

Display VMI bma debug

Router# debug vmi error

Display internal VMI anomalies detected

Router# debug vmi multicast

Display VMI multicast packets

Router# debug vmi neighbor

Display VMI neighbor transaction debugging

Router# debug vmi packet

Display VMI packet trace

Router# debug vmi pppoe

Display VMI PPPoE packet/activity debug

Router# debug vmi registries

Display VMI registry calls

Virtual Template

Command or Action

Purpose

Router# debug vtemplate cloning

Virtual Template cloning information

Router# debug vtemplate error

Virtual Template errors

Router# debug vtemplate event

Virtual Template events

Router# debug vtemplate subinterface

Virtual Template subinterface command

Subscriber Service

Command or Action

Purpose

Router# debug sss errors

Subscriber Service Switch Manager errors

Router# debug ssss event

Subscriber Service Switch Manager events