Multicast: Sparse-Mode: Configuring Auto RP-Announce-Filter:

Multicast: Sparse-Mode: Configuring Auto RP-Announce-Filter:

·         Let me take a basic 3-router topology:

R1---fa0/0-----fa0/0---R2----fa0/1--------fa0/1-----R3

   ·         R1-R2: 10.1.12.0/24

·         R2-R3: 10.1.23.0/24

 

·         OSPF is configured between these 3 routers and they are able to reach all loopback interfaces.

·         Let me configure R2’s loopback0 as RP for all even number of groups and

·         R3’s loopback0 as RP for all odd number of groups

·         And R1 will be the Mapping Agent

·         We need to enable ip pim sparse-mode under loopback0 interface in R2 and R3.

·         We need to enable ip pim sparse-mode under loopback0 interface in he Mapping Agent R1 also.

·         R1 is acting as multicast server and R3’s loopback0 is acting as receiver.

 

R2(config)#ip access-list standard EVEN

R2(config-std-nacl)#permit 224.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 226.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 228.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 230.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 232.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 234.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 236.0.0.0 0.255.255.255

R2(config-std-nacl)#permit 238.0.0.0 0.255.255.255

R2(config-std-nacl)#

R2(config-std-nacl)#exit

 

R2(config)# ip pim send-rp-announce loopback 0 scope 255 group-list EVEN interval 5

R2(config)#

 

R3(config)#ip access-list standard ODD

R3(config-std-nacl)#permit 225.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 227.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 229.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 231.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 233.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 235.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 237.0.0.0 0.255.255.255

R3(config-std-nacl)#permit 239.0.0.0 0.255.255.255

R3(config-std-nacl)#

R3(config)#ip pim send-rp-announce loopback 0 scope 255 group-list ODD interval 5

 

R1(config)#

R1(config)#ip access-list standard EVEN

R1(config-std-nacl)#permit 224.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 226.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 228.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 230.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 232.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 234.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 236.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 238.0.0.0 0.255.255.255

R1(config-std-nacl)#

R1(config-std-nacl)#

R1(config-std-nacl)#

R1(config-std-nacl)#ip access-list standard ODD

R1(config-std-nacl)#permit 225.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 227.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 229.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 231.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 233.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 235.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 237.0.0.0 0.255.255.255

R1(config-std-nacl)#permit 239.0.0.0 0.255.255.255

R1(config-std-nacl)#

R1(config-std-nacl)#

R1(config-std-nacl)#exit

R1(config)#

 

R1(config)#ip access-list standard R2-EVEN

R1(config-std-nacl)#permit 2.2.2.2

R1(config-std-nacl)#exit

R1(config)#ip access-list standard R3-ODD

R1(config-std-nacl)#permit 3.3.3.3

R1(config-std-nacl)#

 

R1(config)#ip pim send-rp-discovery scope 255

R1(config)#ip pim rp-announce-filter rp-list R2-EVEN group-list EVEN

R1(config)#ip pim rp-announce-filter rp-list R3-ODD group-list ODD

R1(config)#

 

·         Now, let me check RP mapping details:

R1#show ip pim rp mapping

PIM Group-to-RP Mappings

This system is an RP-mapping agent

 

Group(s) 224.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:34, expires: 00:00:11

Group(s) 225.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:31, expires: 00:00:12

Group(s) 226.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:34, expires: 00:00:11

Group(s) 227.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:31, expires: 00:00:12

Group(s) 228.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:34, expires: 00:00:11

Group(s) 229.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:11

Group(s) 230.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:35, expires: 00:00:10

Group(s) 231.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:11

Group(s) 232.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:35, expires: 00:00:11

Group(s) 233.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:11

Group(s) 234.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:35, expires: 00:00:10

Group(s) 235.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:11

Group(s) 236.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:36, expires: 00:00:15

Group(s) 237.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:11

Group(s) 238.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 2.2.2.2 (?), elected via Auto-RP

         Uptime: 00:00:36, expires: 00:00:15

Group(s) 239.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 3.3.3.3 (?), elected via Auto-RP

         Uptime: 00:00:32, expires: 00:00:10

R1#

 

R2#show ip pim rp mapping

PIM Group-to-RP Mappings

This system is an RP (Auto-RP)

 

Group(s) 224.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:43, expires: 00:02:20

Group(s) 225.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:40, expires: 00:02:16

Group(s) 226.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:43, expires: 00:02:19

Group(s) 227.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:40, expires: 00:02:19

Group(s) 228.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:43, expires: 00:02:17

Group(s) 229.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:40, expires: 00:02:15

Group(s) 230.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:44, expires: 00:02:17

Group(s) 231.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:40, expires: 00:02:14

Group(s) 232.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:44, expires: 00:02:19

Group(s) 233.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:40, expires: 00:02:18

Group(s) 234.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:44, expires: 00:02:18

Group(s) 235.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:41, expires: 00:02:15

Group(s) 236.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:44, expires: 00:02:19

Group(s) 237.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:41, expires: 00:02:16

Group(s) 238.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:44, expires: 00:02:17

Group(s) 239.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:41, expires: 00:02:18

R2#

 

R3#show ip pim rp mapping

PIM Group-to-RP Mappings

This system is an RP (Auto-RP)

 

Group(s) 224.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:51, expires: 00:02:10

Group(s) 225.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:47, expires: 00:02:12

Group(s) 226.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:51, expires: 00:02:09

Group(s) 227.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:47, expires: 00:02:12

Group(s) 228.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:51, expires: 00:02:12

Group(s) 229.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:12

Group(s) 230.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:52, expires: 00:02:10

Group(s) 231.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:09

Group(s) 232.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:52, expires: 00:02:12

Group(s) 233.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:11

Group(s) 234.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:52, expires: 00:02:12

Group(s) 235.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:10

Group(s) 236.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:52, expires: 00:02:10

Group(s) 237.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:11

Group(s) 238.0.0.0/8

  RP 2.2.2.2 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:52, expires: 00:02:08

Group(s) 239.0.0.0/8

  RP 3.3.3.3 (?), v2v1

    Info source: 10.1.12.1 (?), elected via Auto-RP

         Uptime: 00:00:48, expires: 00:02:07

R3#

 

Observation:

·         R2’s loopback0, 2.2.2.2 is RP for all even number groups

·         R3’s loopback0, 3.3.3.3 is RP for all odd number groups

·         R1’s loopback0 is the mapping agent