Configuring MDT switchover parameters
About MDT switchover parameters
To decrease traffic interruption caused by frequent default-MDT to data-MDT switchovers, you can adjust the data-delay period. The switchover occurs a data-delay period after the multicast VPN data first arrives, regardless of whether multicast VPN data keeps arriving during the period.
Restrictions and guidelines
On a PE, the data-group range for an MVPN cannot include the default-group or data-groups of any other MVPN.
All VPN instances share the data-group resources. As a best practice to avoid data-group resource exhaustion, specify a reasonable data-group range for a VPN instance.
For an MVPN that transmits both IPv4 and IPv6 multicast packets, the data-group range in MVPN IPv4 and IPv6 address family views cannot overlap.
If the public network runs PIM-SSM, the data-group range for an MVPN on a PE can overlap with data-group ranges for other MDs on other PEs.
Procedure
Enter system view.
system-view
Enter MVPN view.
multicast-mvpn vpn-instance vpn-instance-name mode mdt
Enter MVPN address family view.
Enter MVPN IPv4 address family view.
address-family ipv4
Enter MVPN IPv6 address family view.
address-family ipv6
Configure the data-group range and the switchover criteria.
data-group group-address { mask-length | mask } [ acl acl-number ] *
By default, no data-group range exists, and the default-MDT to data-MDT switchover never occurs.
Set the data-delay period.
data-delay delay
By default, the data-delay period is 3 seconds.