IPv6 Multicast Protocols
Syntax: show ipv6 pim [ vrf vrf-name ] sparse
The vrf parameter allows you to configure IPv6 PIM on the virtual routing instance (VRF) specified by the
The following table displays the output from the show ipv6 pim sparse command.
TABLE 26 Output from the show ipv6 pim sparse command
FieldDescription
Global PIM Sparse mode settings
Maximum mcache | Maximum number of multicast cache entries. |
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Current Count | Number of multicast cache entries used. |
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Hello interval | How frequently the device sends IPv6 PIM Sparse hello messages to its IPv6 PIM Sparse |
| neighbors. This field shows the number of seconds between hello messages. IPv6 PIM |
| Sparse routers use hello messages to discover one another. |
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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 IPv6 PIM |
| Sparse forwarding entries for the neighbor. Default is 105 seconds. |
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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 IPv6 PIM Sparse group. When forwarding packets from IPv6 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. |
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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 |
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| not want the traffic. Range is from zero to three seconds. Default is three seconds. |
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Bootstrap Msg interval | How frequently the BSR configured on the device sends the RP set to the RPs within the |
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| IPv6 PIM Sparse domain. The RP set is a list of candidate RPs and their group prefixes. |
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| The group prefix of a candidate RP indicates the range of IPv6 PIM Sparse group |
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| numbers for which it can be an RP. |
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| NOTE |
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| This field contains a value only if an interface on the device is elected to be the BSR. |
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| Otherwise, the field is blank. |
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FastIron Ethernet Switch IP Multicast Configuration Guide | 177 |
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