Knowledge about router PIM commands and definitions

PIM can use the unicast route table established by various unicast routing protocols to perform the RPF check function, instead of maintaining a separate Multicast Route table for multicast forwarding, it uses the RPF mechanism to forward multicast packets. When a multicast packet arrives at a local device, it first performs the RPF check: If the RPF check succeeds, create a route table entry for multicast to forward multicast packets. If the RPF check fails, the packet is discarded.

1. to configure a vro as a member of the HSRP backup group, run the following command in Interface Configuration Mode:

Router (config-if) # standby group-number ip address-address

2. In order to allow a vro to resume its forwarding role, in Interface Configuration Mode:

Router (config-if) # standy group-number preempt

3. The access time and retention time parameters are configurable:

Router (config-if) # standy group-number timers hellotime holdtime

4. Configure HSRP tracking:

Router (config-if) # standy group-number track type-number interface-priority

5. Run the show ip igmp command to determine the queried Server:

Router # show standby type-number group brief

6. Start IP Multicast Route Selection:

Router (config) # ip muticast-routing

VII. PIM on the startup interface:

Dalllasr1> (config-if) # ip pim {dense-mode | sparse-dense-mode}

8. Start the PIM in dense mode:

Router # ip multicast-routing

Router # interface type number

Router # ip pim sparse-dense-mode

IX. Verify the PIM Configuration:

Dallasr1> # show ip pim interface [type number] [count]

10. Display PIM neighbors:

Dallasr1> # show ip neighbor type number

11. to configure the RP address, run the following command:

Dallasr1> # ip pim rp-address ip-address [group-access-list-number] [override]

12. Select a default RP:

Dallasr1> # ip pim rp-address

XIII. advertised RP and the scope of the group it serves:

Dallasr1> # ip pim send-rp-announce type number scope ttl group-list access-list-number

14. Address for notifying the RP for the management scope group:

Dallasr1> # ip pim send-rp-announce ethernet0 scope 16 group-list1

Dallasr1> # access-list 1 permit 266.0.0.0 0.20.255.255

15. Set an RP image Proxy:

Dallasr1> # ip pim send-rp-discovery scope ttl

16. Verify the image from the group to the RP:

Dallasr1> # show ip pim rp mapping

Dallasr1> # show ip pim rp [group-name | group-address] [mapping]

17. On the vro interface, use the command ip multicast ttl-threshold ttl-value to set the TTL threshold:

Dallasr1> (config-if) # ip multicast ttl-threshold ttl-value

18. Use show ip pim neighbor to display the PIM neighbor table.

Dallasr1> show ip mroute [group-name | group-address] [scoure] [summary] [count] [active kbps]