IPv4 Multicast Protocols
The vrf keyword allows you to display PIM sparse configuration information for the VRF instance identified by the
This example shows the PIM Sparse configuration information on PIM Sparse device A in Figure 5 on page 95.
The following table shows the information displayed by the show ip pim sparse command.
TABLE 4 Output of the show ip pim sparse command
This field... | Displays... |
| |
Global PIM Sparse mode settings | |
|
|
Maximum mcache | Maximum number of multicast cache entries. |
|
|
Current Count | Number of multicast cache entries used. |
|
|
Hello interval | How frequently the device sends IPIM Sparse hello messages to its PIM Sparse |
| neighbors. This field shows the number of seconds between hello messages. PIM |
| Sparse routers use hello messages to discover one another. |
|
|
Neighbor timeout | Number of seconds the device waits for a hello message from a neighbor before |
| determining that the neighbor is no longer present and is not removing cached PIM |
| Sparse forwarding entries for the neighbor. Default is 105 seconds. |
|
|
Join or Prune interval | How frequently the device sends IPv6 PIM Sparse Join or Prune messages for the |
| multicast groups it is forwarding. This field shows the number of seconds between Join or |
| Prune messages. |
| The device sends Join or Prune messages on behalf of multicast receivers that want to |
| join or leave an PIM Sparse group. When forwarding packets from PIM Sparse sources, |
| the device sends the packets only on the interfaces on which it has received join |
| requests in Join or Prune messages for the source group. |
|
|
Inactivity interval | Number of seconds a forwarding entry can remain unused before the router deletes it. |
| Default is 180 sec. |
Hardware Drop Enabled
Indicates whether hardware drop is enabled or disabled.
To prevent unwanted multicast traffic from being sent to the CPU, PIM Routing and Passive Multicast Route Insertion (PMRI) can be used together to ensure that multicast streams are only forwarded out ports with interested receivers and unwanted traffic is dropped in the hardware on Layer 3 Switches.
Prune Wait Interval | Number of seconds a PIM device waits before stopping traffic to neighbor devices that do |
| not want the traffic. Range is from zero to three seconds. Default is three seconds. |
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106 | FastIron Ethernet Switch IP Multicast Configuration Guide |
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