Adjusting Graft Control Parameters
Context
To quickly resume multicast forwarding to a pruned network segment, the switch sends a Graft message to its upstream neighbor and starts a timer on the upstream interface. If the switch does not receive multicast data when the timer expires, it sends another Graft message to the upstream neighbor.
Procedure
- Run system-view
The system view is displayed.
- Run interface interface-type interface-number
The interface view is displayed.
- (Optional) On an Ethernet interface, run undo portswitch
The interface is switched to Layer 3 mode.
By default, an Ethernet interface works in Layer 2 mode.
Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
- Run pim ipv6 timer graft-retry interval
The retransmission interval of Graft messages is configured.
Verifying the Configuration
After adjusting the retransmission interval of Graft messages on an interface, check IPv6 PIM-DM graft information and IPv6 PIM information on the interface to see whether the configuration meets service requirements.
Run the display pim ipv6 interface [ interface-type interface-number | up | down ] [ verbose ] command in any view to check IPv6 PIM information on an interface.
Run the display pim ipv6 grafts command to check information about IPv6 PIM-DM Graft messages that have not been acknowledged by the upstream neighbor.