H3C Routers
BIDIR-PIM Configuration Examples

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Contents

Introduction· 1

Prerequisites· 1

Example: Configuring BIDIR-PIM·· 1

Network configuration· 1

Analysis· 2

Software versions used· 2

Restrictions and guidelines· 2

Procedures· 2

Configure Router A· 2

Configure Router B· 3

Configure Router C· 4

Verifying the configuration· 5

Configuration files· 10

Related documentation· 12

 

Introduction

This document introduces BIDIR-PIM configuration examples.

Prerequisites

This document is not restricted to specific software or hardware versions.

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of BIDIR-PIM.

Example: Configuring BIDIR-PIM

Network configuration

As shown in Figure 1:

·     Router A, Router B, and Router C run OSPF.

·     Source 1 and Source 2 send multicast data to multicast group 225.1.1.1.

·     Host A and Host B are member hosts of multicast group 225.1.1.1.

Configure BIDIR-PIM on the routers to implement multicast forwarding.

Figure 1 Network diagram

‌

Table 1 Interface and IP address assignment

Device	Interface	IP address	Device	Interface	IP address
Router A	GE0/0/1	10.10.1.1/24	Router C	GE0/0/1	10.13.1.3/24
Router A	GE0/0/2	10.12.1.1/24	Router C	GE0/0/2	10.23.1.3/24
Router A	GE0/0/3	10.13.1.1/24	Router C	GE0/0/3	10.102.1.1/24
Router B	GE0/0/1	10.12.1.2/24	Router C	GE0/0/4	10.33.1.3/24
Router B	GE0/0/2	10.23.1.2/24	Source 1	—	10.10.1.2/24
Router B	GE0/0/3	10.101.1.1/24	Source 2	—	10.33.1.4/24

 

Analysis

To meet the network requirements, perform the following tasks:

·     To establish the bidirectional RPT, configure GigabitEthernet 0/0/2 on Router A as a C-RP.

·     To use the BSR mechanism to dynamically elect the RP, configure GigabitEthernet 0/0/2 on Router A as a C-BSR.

·     To avoid multicast forwarding interruption when the RP fails, specify the unused IP address 10.13.1.4/24 as the static RP. In this way, the link on the subnet 10.13.1.0/24 becomes the RPL. Router A and Router C on the link function as the RPs.

Software versions used

This configuration example was created and verified on Release 9141P16 of the MSR2630E-X1 router.

Restrictions and guidelines

When you configure BIDIR-PIM, follow these restrictions and guidelines:

·     Enable the same PIM mode on the interfaces that belong to the same VPN instance on each router.

·     Configure the same static RP on all the routers in the BIDIR-PIM domain.

·     Enable PIM-SM for all interfaces on the routers in the BIDIR-PIM domain.

·     Enable IGMP for the interfaces that connect to the stub networks on all the routers in the BIDIR-PIM domain.

Procedures

Configure Router A

1.     Enable IP multicast routing.

<RouterA> system-view

System View: return to User View with Ctrl+Z.

[RouterA] multicast routing

[RouterA-mrib] quit

2.     Configure each interface and enable PIM-SM.

# Assign an IP address to GigabitEthernet 0/0/1, and enable PIM-SM on the interface.

[RouterA] interface gigabitethernet 0/0/1

[RouterA-GigabitEthernet0/0/1] ip address 10.10.1.1 24

[RouterA-GigabitEthernet0/0/1] pim sm

[RouterA-GigabitEthernet0/0/1] quit

# Assign an IP address to GigabitEthernet 0/0/2, enable PIM-SM on the interface.

[RouterA-vlan12] interface gigabitethernet 0/0/2

[RouterA-GigabitEthernet0/0/2] ip address 10.12.1.1 24

[RouterA-GigabitEthernet0/0/2] pim sm

[RouterA-GigabitEthernet0/0/2] quit

# Assign an IP address to GigabitEthernet 0/0/3, enable PIM-SM on the interface.

[RouterA] interface gigabitethernet 0/0/3

[RouterA-GigabitEthernet0/0/3] ip address 10.13.1.1 24

[RouterA-GigabitEthernet0/0/3] pim sm

[RouterA-GigabitEthernet0/0/3] quit

3.     Configure a C-RP, a C-BSR, and the static RP.

# Configure GigabitEthernet 0/0/2 as a C-BSR and a C-RP.

[RouterA] pim

[RouterA-pim] c-bsr 10.12.1.1

[RouterA-pim] c-rp 10.12.1.1 bidir

# Specify the unused IP address 10.13.1.4 as a static RP.

[RouterA-pim] static-rp 10.13.1.4 bidir

4.     Enable BIDIR-PIM.

[RouterA-pim] bidir-pim enable

[RouterA-pim] quit

5.     Configure OSPF.

[RouterA] ospf 1

[RouterA-ospf-1] import-route direct

[RouterA-ospf-1] area 0

[RouterA-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255

[RouterA-ospf-1-area-0.0.0.0] quit

[RouterA-ospf-1] quit

Configure Router B

1.     Enable IP multicast routing.

<RouterB> system-view

System View: return to User View with Ctrl+Z.

[RouterB] multicast routing

[RouterB-mrib] quit

2.     Configure each interface and enable PIM-SM.

# Assign an IP address to GigabitEthernet 0/0/1, enable PIM-SM on the interface.

[RouterB] interface gigabitethernet 0/0/1

[RouterB-GigabitEthernet0/0/1] ip address 10.12.1.2 24

[RouterB-GigabitEthernet0/0/1] pim sm

[RouterB-GigabitEthernet0/0/1] quit

# Assign an IP address to GigabitEthernet 0/0/2, enable PIM-SM on the interface.

[RouterB] interface gigabitethernet 0/0/2

[RouterB-GigabitEthernet0/0/2] ip address 10.23.1.2 24

[RouterB-GigabitEthernet0/0/2] pim sm

[RouterB-GigabitEthernet0/0/2] quit

# Assign an IP address to GigabitEthernet 0/0/3, enable PIM-SM and IGMP on the interface.

[RouterB] interface gigabitethernet 0/0/3

[RouterB-GigabitEthernet0/0/3] ip address 10.101.1.1 24

[RouterB-GigabitEthernet0/0/3] pim sm

[RouterB-GigabitEthernet0/0/3] igmp enable

[RouterB-GigabitEthernet0/0/3] quit

3.     Specify the unused IP address 10.13.1.4 as a static RP.

[RouterB] pim

[RouterB-pim] static-rp 10.13.1.4 bidir

4.     Enable BIDIR-PIM.

[RouterB-pim] bidir-pim enable

[RouterB-pim] quit

5.     Configure OSPF.

[RouterB] ospf 1

[RouterB-ospf-1] import-route direct

[RouterB-ospf-1] area 0

[RouterB-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255

[RouterB-ospf-1-area-0.0.0.0] quit

[RouterB-ospf-1] quit

Configure Router C

1.     Enable IP multicast routing.

<RouterC> system-view

System View: return to User View with Ctrl+Z.

[RouterC] multicast routing

[RouterC-mrib] quit

2.     Configure each interface and enable PIM-SM.

# Assign an IP address to GigabitEthernet 0/0/4, enable PIM-SM on the interface.

[RouterC] interface gigabitethernet 0/0/4

[RouterC-GigabitEthernet0/0/4] ip address 10.33.1.3 24

[RouterC-GigabitEthernet0/0/4] pim sm

[RouterC-GigabitEthernet0/0/4] quit

# Assign an IP address to GigabitEthernet 0/0/1, enable PIM-SM on the interface.

[RouterC] interface gigabitethernet 0/0/1

[RouterC-GigabitEthernet0/0/1] ip address 10.13.1.3 24

[RouterC-GigabitEthernet0/0/1] pim sm

[RouterC-GigabitEthernet0/0/1] quit

# Assign an IP address to GigabitEthernet 0/0/2, enable PIM-SM on the interface.

[RouterC] interface gigabitethernet 0/0/2

[RouterC-GigabitEthernet0/0/2] ip address 10.23.1.3 24

[RouterC-GigabitEthernet0/0/2] pim sm

[RouterC-GigabitEthernet0/0/2] quit

# Assign an IP address to GigabitEthernet 0/0/3, enable PIM-SM and IGMP on the interface.

[RouterC] interface gigabitethernet 0/0/3

[RouterC-GigabitEthernet0/0/3] ip address 10.102.1.1 24

[RouterC-GigabitEthernet0/0/3] pim sm

[RouterC-GigabitEthernet0/0/3] igmp enable

[RouterC-GigabitEthernet0/0/3] quit

3.     Specify the unused IP address 10.13.1.4 as a static RP.

[RouterC] pim

[RouterC-pim] static-rp 10.13.1.4 bidir

4.     Enable BIDIR-PIM

[RouterC-pim] bidir-pim enable

[RouterC-pim] quit

5.     Configure OSPF.

[RouterC] ospf 1

[RouterC-ospf-1] import-route direct

[RouterC-ospf-1] area 0

[RouterC-ospf-1-area-0.0.0.0] network 10.0.0.0 0.255.255.255

[RouterC-ospf-1-area-0.0.0.0] quit

[RouterC-ospf-1] quit

Verifying the configuration

1.     Verify that Router A, Router B, and Router C have established PIM neighbor relationships.

# Display PIM neighbor information on Router A.

[RouterA] display pim neighbor

 Total Number of Neighbors = 2

 

 Neighbor        Interface           Uptime   Expires  DR-Priority Mode

 10.12.1.2       GE0/0/2                    00:02:27 00:01:45 1           B

 10.13.1.3       GE0/0/3             00:02:27 00:01:19 1           B

# Display PIM neighbor information on Router B.

[RouterB] display pim neighbor

 Total Number of Neighbors = 2

 

 Neighbor        Interface           Uptime   Expires  DR-Priority Mode

 10.12.1.1       GE0/0/1             00:03:05 00:01:44 1           B

 10.23.1.3       GE0/0/3             00:13:49 00:01:29 1           B

# Display PIM neighbor information on Router C.

[RouterC] display pim neighbor

 Total Number of Neighbors = 2

 

 Neighbor        Interface           Uptime   Expires  DR-Priority Mode

 10.13.1.1       GE0/0/1             00:03:28 00:01:39 1           B

 10.23.1.2       GE0/0/2                    00:14:05 00:01:36 1           B

2.     Verify that GigabitEthernet 0/0/2 on Router A has been elected as the BSR on each router.

# Display BSR information on Router A.

[RouterA] display pim bsr-info

 Scope: non-scoped

     State: Elected

     Bootstrap timer: 00:01:18

     Elected BSR address: 10.12.1.1

       Priority: 64

       Hash mask length: 30

       Uptime: 00:04:01

     Candidate BSR address: 10.12.1.1

       Priority: 64

       Hash mask length: 30

# Display BSR information on Router B.

[RouterB] display pim bsr-info

 Scope: non-scoped

     State: Accept Preferred

     Bootstrap timer: 00:00:26

     Elected BSR address: 10.12.1.1

       Priority: 64

       Hash mask length: 30

       Uptime: 00:10:41

# Display BSR information on Router C.

[RouterC] display pim bsr-info

 Scope: non-scoped

     State: Accept Preferred

     Bootstrap timer: 00:02:08

     Elected BSR address: 10.12.1.1

       Priority: 64

       Hash mask length: 30

       Uptime: 00:15:41

3.     Verify that GigabitEthernet 0/0/2 on Router A has been elected as the RP, and verify that the IP address of the static RP is 10.13.1.4 on each router.

# Display RP information on Router A.

[RouterA] display pim rp-info

 BSR RP information:

   Scope: non-scoped

     Group/MaskLen: 224.0.0.0/4 [B]

       RP address               Priority  HoldTime  Uptime    Expires

       10.12.1.1 (local)        192       150       00:06:01  00:02:58

 

 Static RP information:

       RP address               ACL   Mode    Preferred

       10.13.1.4                ----  bidir   No

# Display RP information on Router B.

[SwatchB] display pim rp-info

 BSR RP information:

   Scope: non-scoped

     Group/MaskLen: 224.0.0.0/4 [B]

       RP address               Priority  HoldTime  Uptime    Expires

       10.12.1.1                192       150       00:06:33  00:02:26

 

 Static RP information:

       RP address               ACL   Mode    Preferred

       10.13.1.4                ----  bidir   No

# Display RP information on Router C.

[RouterC] display pim rp-info

 BSR RP information:

   Scope: non-scoped

     Group/MaskLen: 224.0.0.0/4 [B]

       RP address               Priority  HoldTime  Uptime    Expires

       10.12.1.1                192       150       00:06:51  00:02:05

 

Static RP information:

       RP address               ACL   Mode    Preferred

       10.13.1.4                ----  bidir   No

4.     Verify that the DFs have been elected for BIDIR-PIM on each router.

# Display information about DFs for BIDIR-PIM on Router A.

[RouterA] display pim df-info

RP address: 10.12.1.1

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/1             Win     0          0          00:01:09  10.10.1.1 (local)

 GE0/0/2                    -       -          -          -         -

 GE0/0/3             Win     0          0          00:01:10  10.13.1.1 (local)

 

RP address: 10.13.1.4

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/1             Win     0          0          00:00:07  10.10.1.1 (local)

 GE0/0/2                    Win     0          0          00:00:07  10.12.1.1 (local)

 GE0/0/3             -       -          -          -         -

# Display information about DFs for BIDIR-PIM on Router B.

[RouterB] display pim df-info

RP address: 10.12.1.1

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/1             -       -          -          -         -

 GE0/0/2                    Win     0          0          00:01:46  10.23.1.2 (local)

 GE0/0/3             Win     0          0          00:01:45  10.101.1.1 (local)

 

RP address: 10.13.1.4

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/1             Lose    0          0          00:00:44  10.12.1.1

 GE0/0/2                    Lose    0          0          00:00:53  10.23.1.3

 GE0/0/3             Win     10         2          00:00:53  10.101.1.1 (local)

# Display information about DFs for BIDIR-PIM on Router C.

[RouterC] display pim df-info

RP address: 10.12.1.1

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/3             Win     10         2          00:02:07  10.102.1.1 (local)

 GE0/0/4             Win     10         2          00:02:06  10.33.1.3 (local)

 GE0/0/1             Lose    0          0          00:02:07  10.13.1.1

 GE0/0/2                    Lose    0          0          00:02:07  10.23.1.2

 

RP address: 10.13.1.4

 Interface           State   DF-Pref    DF-Metric  DF-Uptime DF-Address

 GE0/0/3             Win     0          0          00:01:24  10.102.1.1 (local)

 GE0/0/4             Win     0          0          00:01:23  10.33.1.3 (local)

 GE0/0/1             -       -          -          -         -

 GE0/0/2                    Win     0          0          00:01:24  10.23.1.3 (local)

5.     Verify that DFs for multicast forwarding are correct on each router.

# Display information about DFs for multicast forwarding on Router A.

[RouterA] display multicast forwarding df-info

Total 2 RPs, 2 matched

 

00001. RP address: 10.12.1.1

     Flags: 0x0

     Uptime: 00:02:42

     RPF interface: GigabitEthernet0/0/2

     List of 2 DF interfaces:

       1: GigabitEthernet0/0/1

       2: GigabitEthernet0/0/3

 

00002. RP address: 10.13.1.4

     Flags: 0x0

     Uptime: 00:01:41

     RPF interface: GigabitEthernet0/0/3

     List of 2 DF interfaces:

       1: GigabitEthernet0/0/1

       2: GigabitEthernet0/0/2

# Display information about DFs for multicast forwarding on Router B.

[RouterB] display multicast forwarding df-info

Total 2 RPs, 2 matched

 

00001. RP address: 10.12.1.1

     Flags: 0x0

     Uptime: 00:03:18

     RPF interface: GigabitEthernet0/0/1

     List of 2 DF interfaces:

       1: GigabitEthernet0/0/2

       2: GigabitEthernet0/0/3

 

00002. RP address: 10.13.1.4

     Flags: 0x0

     Uptime: 00:02:24

     RPF interface: GigabitEthernet0/0/2

     List of 1 DF interfaces:

       1: GigabitEthernet0/0/3

# Display information about DFs for multicast forwarding on Router C.

[RouterC] display multicast forwarding df-info

Total 2 RPs, 2 matched

 

00001. RP address: 10.12.1.1

     Flags: 0x0

     Uptime: 00:03:38

     RPF interface: GigabitEthernet0/0/2

     List of 2 DF interfaces:

       1: GigabitEthernet0/0/3

       2: GigabitEthernet0/0/4

 

00002. RP address: 10.13.1.4

     Flags: 0x0

     Uptime: 2d:18h

     RPF interface: GigabitEthernet0/0/1

     List of 3 DF interfaces:

       1: GigabitEthernet0/0/3

       2: GigabitEthernet0/0/4

       3: GigabitEthernet0/0/2

6.     Send IGMP reports from Host A and Host B to join multicast group 225.1.1.1, and send multicast data from Source 1 and Source 2 to the group. (Details not shown.)

7.     Verify that PIM forwarding entries have been correctly established on each router.

# Display information about PIM routing entries on Router A.

[RouterA] display pim routing-table

 Total 1 (*, G) entry; 0 (S, G) entry

 

 (*, 225.1.1.1)

     RP: 10.12.1.1 (local)

     Protocol: pim-bidir, Flag: WC LOC ACT

     UpTime: 00:21:59

     Upstream interface: GigabitEthernet0/0/2

         Upstream neighbor: NULL

         RPF prime neighbor: NULL

     Downstream interface(s) information:

     Total number of downstreams: 1

         1: GigabitEthernet0/0/2

             Protocol: pim-bidir, UpTime: 00:21:59, Expires: -

         2: GigabitEthernet0/0/3

             Protocol: pim-bidir, UpTime: 00:03:26, Expires: -

# Display information about PIM routing entries on Router B.

[RouterB] display pim routing-table

 Total 1 (*, G) entry; 0 (S, G) entry

 

 (*, 225.1.1.1)

     RP: 10.12.1.1

     Protocol: pim-bidir, Flag: WC LOC ACT

     UpTime: 00:23:47

     Upstream interface: GigabitEthernet0/0/1

         Upstream neighbor: NULL

         RPF prime neighbor: NULL

     Downstream interface(s) information:

     Total number of downstreams: 3

         1: GigabitEthernet0/0/2

             Protocol: pim-bidir, UpTime: 00:23:47, Expires: -

         2: GigabitEthernet0/0/2

             Protocol: pim-bidir, UpTime: 00:21:56, Expires: -

         3: GigabitEthernet0/0/3

             Protocol: igmp, UpTime: 00:23:47, Expires: -

# Display information about PIM routing entries on Router C.

[RouterC] display pim routing-table

 Total 1 (*, G) entry; 0 (S, G) entry

 

 (*, 225.1.1.1)

     RP: 10.12.1.1

     Protocol: pim-bidir, Flag: WC ACT

     UpTime: 00:01:45

     Upstream interface: GigabitEthernet0/0/2

         Upstream neighbor: 10.23.1.2

         RPF prime neighbor: 10.23.1.2

     Downstream interface(s) information:

     Total number of downstreams: 2

         1: GigabitEthernet0/0/3

             Protocol: igmp, UpTime: 00:01:05, Expires: -

         2: GigabitEthernet0/0/2

             Protocol: pim-bidir, UpTime: 00:00:53, Expires: -

Configuration files

·     Router A:

#

ospf 1

 import-route direct

 area 0.0.0.0

  network 10.0.0.0 0.255.255.255

#

interface GigabitEthernet0/0/1

 port link-mode route

 ip address 10.10.1.1 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/2

 port link-mode route

 ip address 10.12.1.1 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/3

 port link-mode route

 ip address 10.13.1.1 255.255.255.0

 pim sm

#

multicast routing

#

pim

 c-bsr 10.12.1.1

 c-rp 10.12.1.1 bidir

 static-rp 10.13.1.4 bidir

 bidir-pim enable

#

·     Router B:

#

ospf 1

 import-route direct

 area 0.0.0.0

  network 10.0.0.0 0.255.255.255

#

interface GigabitEthernet0/0/1

 port link-mode route

 combo enable copper

 ip address 10.12.1.2 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/2

 port link-mode route

 combo enable copper

 ip address 10.23.1.2 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/3

 port link-mode route

 combo enable copper

 ip address 10.101.1.1 255.255.255.0

 pim sm

 igmp enable

#

multicast routing

#

pim

 static-rp 10.13.1.4 bidir

 bidir-pim enable

#

·     Router C:

#

ospf 1

 import-route direct

 area 0.0.0.0

  network 10.0.0.0 0.255.255.255

#

interface GigabitEthernet0/0/1

 port link-mode route

 ip address 10.13.1.3 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/2

 port link-mode route

 ip address 10.23.1.3 255.255.255.0

 pim sm

#

interface GigabitEthernet0/0/3

 port link-mode route

 ip address 10.102.1.1 255.255.255.0

 pim sm

 igmp enable

#

interface GigabitEthernet0/0/4

 port link-mode route

 ip address 10.33.1.3 255.255.255.0

 pim sm

#

multicast routing

#

pim

 static-rp 10.13.1.4 bidir

 bidir-pim enable

#

Related documentation

·     IP Multicast Configuration Guide in H3C MSR1000[2600][3600] Routers Configuration Guides(V9)

·     IP Multicast Command Reference in H3C MSR1000[2600][3600] Routers Command References(V9)