Configuration restrictions and guidelines, Trill configuration task list – H3C Technologies H3C S6800 Series Switches User Manual
Page 14
7
Configuration restrictions and guidelines
When you configure TRILL, follow these restrictions and guidelines:
•
Configuration in Layer 2 Ethernet interface view takes effect only on the current port. Configuration
in Layer 2 aggregate interface view takes effect on the current interface and its member ports.
Configuration on the member port of an aggregate interface takes effect after the member port
leaves the aggregation group.
•
To connect a spanning tree network to a TRILL network, make sure the following requirements are
met:
{
The spanning tree protocol is disabled on the TRILL network.
{
An edge port is used to connect the spanning tree network to the TRILL network. The edge port
can transit to the forwarding state before DRB election is finished. This prevents multiple DRBs
from being elected.
For more information about spanning tree protocols, see Layer 2—LAN Switching Configuration
Guide.
•
H3C recommends not enabling loop detection on TRILL ports, because TRILL avoids loops. For more
information about loopback detection, see Layer 2—LAN Switching Configuration Guide.
•
If IRF is used, retain the IRF bridge MAC address permanently. Otherwise, traffic interruption might
occur after an IRF split. For more information about IRF configuration, see IRF Configuration Guide.
•
Do not configure the TPID for VLAN tags on RBs. For more information about TPIDs, see Layer
2—LAN Switching Configuration Guide.
•
To avoid loops, do not connect multiple TRILL ports of an RB to a broadcast network, because TRILL
ports cannot detect each other when they are on a broadcast network. If there are multiple TRILL
ports, they might be elected as the appointed ports of a VLAN at the same time and result in loops.
•
For the TRILL network to forward Layer 3 multidestination traffic correctly, make sure the following
requirements are met:
{
The IGMP/MLD snooping version must be the same on all RBs.
{
IGMP or MLD must be enabled on the access-facing VLAN interfaces on gateway RBs to prevent
topology changes from interrupting traffic.
•
Enabling PIM-DM or IPv6 PIM-DM on core layer and distribution layer devices might cause multicast
traffic duplication. H3C recommends that you use other Layer 3 multicast protocols.
TRILL configuration task list
Tasks at a glance
Configuring the system ID and nickname for an RB
(Optional.)
Configuring the link type of a TRILL port
(Optional.)
Configuring the DRB priority of a TRILL port
(Optional.)
Configuring the link cost for a TRILL port
(Optional.)
Configuring announcing VLANs and the designated VLAN
(Optional.)