HP 6125XLG R2306-HP 6125XLG Blade Switch IP Multicast Configuration Guide - Page 89

Setting the maximum size of each join or prune message, Enabling PIM to work with BFD

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Step 6. Set the joined/pruned state holdtime timer. Command pim holdtime join-prune time Remarks By default, the joined/pruned state holdtime timer is 210 seconds. Setting the maximum size of each join or prune message The loss of an oversized join or prune message might result in loss of massive information. You can set a small value for the size of each join or prune message to reduce the impact. To set the maximum size of each join or prune message: Step 1. Enter system view. 2. Enter PIM view. Command system-view pim 3. Set the maximum size of each join or prune message. jp-pkt-size size Remarks N/A N/A By default, the maximum size of a join or prune message is 8100 bytes. Enabling PIM to work with BFD PIM uses hello messages to elect a DR for a shared-media network. The elected DR is the only multicast forwarder on the shared-media network. If the DR fails, a new DR election process will start after the DR is aged out. However, it might take a long period of time before other routers detect the link failures and trigger a new DR election process. To start a new DR election process immediately after the original DR fails, enable PIM to work with Bidirectional Forwarding Detection (BFD) on a shared-media network to detect failures of the links among PIM neighbors. You must enable PIM to work with BFD on all PIM-capable routers on a shared-media network, so that the PIM neighbors can fast detect DR failures and start a new DR election process. For more information about BFD, see High Availability Configuration Guide. Before you configure this feature on an interface, be sure to enable PIM-DM or PIM-SM on the interface. To enable PIM to work with BFD: Step 1. Enter system view. 2. Enter interface view. 3. Enable PIM to work with BFD. Command system-view interface interface-type interface-number pim bfd enable Remarks N/A N/A By default, PIM is disabled to work with BFD. Displaying and maintaining PIM Execute display commands in any view. 82

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82
Step
Command
Remarks
6.
Set the joined/pruned state
holdtime timer.
pim holdtime join-prune
time
By default, the joined/pruned state
holdtime timer is 210 seconds.
Setting the maximum size of each join or prune message
The loss of an oversized join or prune message might result in loss of massive information. You can set a
small value for the size of each join or prune message to reduce the impact.
To set the maximum size of each join or prune message:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter PIM view.
pim
N/A
3.
Set the maximum size of each
join or prune message.
jp-pkt-size
size
By default, the maximum size of a
join or prune message is 8100
bytes.
Enabling PIM to work with BFD
PIM uses hello messages to elect a DR for a shared-media network. The elected DR is the only multicast
forwarder on the shared-media network.
If the DR fails, a new DR election process will start after the DR is aged out. However, it might take a long
period of time before other routers detect the link failures and trigger a new DR election process. To start
a new DR election process immediately after the original DR fails, enable PIM to work with Bidirectional
Forwarding Detection (BFD) on a shared-media network to detect failures of the links among PIM
neighbors. You must enable PIM to work with BFD on all PIM-capable routers on a shared-media network,
so that the PIM neighbors can fast detect DR failures and start a new DR election process. For more
information about BFD, see
High Availability Configuration Guide
.
Before you configure this feature on an interface, be sure to enable PIM-DM or PIM-SM on the interface.
To enable PIM to work with BFD:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type interface-number
N/A
3.
Enable PIM to work
with BFD.
pim bfd enable
By default, PIM is disabled to
work with BFD.
Displaying and maintaining PIM
Execute
display
commands in any view.