H3C Technologies H3C S12500 Series Switches - Manual (Page 270)

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Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VPN instance view. ip vpn-instance vpn-instance-name N/A
3. Configure a share-group
address and an MTI binding.
multicast-domain share-group
group-address binding mtunnel
mtunnel-number
No share-group address or MTI
binding is configured.
Configuring MDT switchover parameters
To avoid frequent switching of multicast traffic between the share-MDT and the switch-MDT:
MDT switchover does not take place immediately after the first private network multicast packet is
received, but it takes place after a switch-delay period has passed, during which transmission of private
network multicast streams has lasted.
To configure MDT switchover parameters:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VPN instance view. ip vpn-instance vpn-instance-name N/A
3. Configure the
switch-group-pool address
range and the switchover
criteria.
multicast-domain
switch-group-pool
switch-group-pool { mask |
mask-length } [ acl acl-number ]
By default, no switch-group-pool is
configured and multicast traffic is
never switched to a switch-MDT.
4. Configure the switch-delay
period.
multicast-domain switch-delay
switch-delay Optional.
5 seconds by default.
5. Configure the
switch-holddown period. multicast-domain holddown-time
interval Optional.
60 seconds by default.
Enabling switch-group reuse logging
For a given VPN, if the number of VPN multicast streams to be switched to switch-MDTs exceeds the
number of addresses in the switch-group-pool, the VPN instance on the source-side PE device can reuse
the addresses in the address pool. With switch-group reuse logging enabled, the address reuse
information will be logged.
Configuration guidelines
• Attributed to the MD module, the group address reuse logging information has a severity level of
informational. For more information about the logging information, see Network Management and
Monitoring Configuration Guide.
• With switch-group reuse logging enabled, the generated group address reuse logging information
will be sent to the information center, where you can configure the rules for outputting the logging
information. For more information about the configuration of the information center, see Network
Management and Monitoring Configuration Guide.