H3C Technologies H3C S6800 Series Switches - Manual (Page 26)

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network.
Enabling incremental flush for TRILL multicast
routing entries
TRILL multicast routing entries are classified into three levels according to the following key combinations:
• RB—Root bridge of a TRILL distribution tree.
• RB+VLAN—Root bridge and VLAN of a TRILL distribution tree.
• RB+VLAN+MAC—Root bridge and VLAN of a TRILL distribution tree and a MAC address.
An entry that is identified by fewer keys is at a higher level.
The incremental flush feature enables the device to compare the outgoing port list and local receiving
flag of an entry with its next higher level entry. If the two entries have the same outgoing port list and local
receiving flag, the higher level entry is issued to the TRILL FIB. For example, if entry RB 2 and entry RB
2+VLAN 10 have the same outgoing port list and local receiving flag, entry RB 2 is issued.
This feature reduces the number of flushed entries in the scenarios where an entry and its next higher level
entry have the same outgoing port list and local receiving flag. Enabling this feature in other scenarios
causes the system to issue a large number of entries at the same time and degrades the device
performance.
To enable incremental flush for TRILL multicast routing entries:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter TRILL view. trill N/A
3. Enable incremental flush for
TRILL multicast routing
entries.
flush-policy difference
By default, incremental flush is
disabled for TRILL multicast routing
entries.
Configuring a TRILL VR
Configure a TRILL VR for the TRILL network to forward Layer 3 traffic.
Creating a TRILL VR
When you create a TRILL VR, you must assign a virtual IP address to the VR. If a VLAN interface connects
to multiple subnets, you can assign multiple virtual IP addresses to the TRILL VR on the interface.
Configuration restrictions and guidelines
• On a VLAN interface, the virtual IP addresses assigned to a TRILL VR must meet the following
requirements:
{
The virtual IP addresses must be on the same network segment as the IP address of the VLAN
interface.