H3C Technologies H3C S12500-X Series Switches - Manual (Page 20)

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When N equal-cost links exist in the network, each TRILL distribution tree selects an equal-cost link for
forwarding packets through J mod N in root bridge priority order. J is the priority sequence number of a
multicast tree and starts from 0.
As shown in
Figure 6 :
• The link directly connecting RB 1 to RB 3 is assigned to the TRILL distribution tree rooted at RB 3.
• The link RB 1-RB 2-RB 3 is assigned to the TRILL distribution tree rooted at RB 4.
To configure the TRILL distribution trees:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter TRILL view. trill N/A
3. Set a priority for the RB. tree-root priority priority The default setting is 32768.
4. Configure the number of
TRILL distribution trees that
the RB wants all RBs to
compute.
trees calculate count The default setting is 1.
5. (Optional.) Enable multicast
ECMP.
multicast-ecmp enable
By default, multicast ECMP is
disabled.
Make sure the multicast ECMP
status is the same on all RBs in the
TRILL network. Otherwise,
multicast, broadcast, and
unknown unicast frames might
fail to be forwarded.
Enabling logging of TRILL neighbor changes
Perform this task to output logs of TRILL neighbor changes to the configuration terminal.
To enable logging of TRILL neighbor changes:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter TRILL view. trill N/A
3. Enable logging of TRILL
neighbor changes.
log-peer-change enable
By default, logging of TRILL neighbor changes
is enabled.
Configuring SNMP for TRILL
After you enable SNMP notification sending for TRILL, TRILL will generate notifications to notify NMS of
important events on the local module and send the notifications to the SNMP module. You can set the
notification sending parameters in SNMP. For more information about notifications, see Network
Management and Monitoring Configuration Guide.