tc-notify { segment { segment-id1 [ to segment-id2 ] } &<1-10> | stp | rrpp | smart-
link send-packet vlan vlan-id }
The topology change of a specified SEP segment is reported to another SEP segment or a network
running other ring protocols such as STP or RRPP.
By default, the topology change of a SEP segment is not reported.
----End
Follow-up Procedure
In the networking scenario where three or more SEP ring networks exist, when a TC notification
packet is sent through multiple links, the upper-layer network will receive it multiple times. This
reduces the efficiency for processing packets on the upper-layer network. Therefore, TC
notification packets need to be suppressed. Suppressing TC notification packets frees the upper-
layer network from processing multiple duplicate packets and protects the devices in the SEP
segment against TC notification packet attacks.
Run the tc-protection interval interval-value command in the SEP-segment view to set the
interval for suppressing TC notification packets.
By default, the interval for suppressing TC notification packets is 2s, and three TC notification
packets with different source addresses are processed within 2s.
NOTE
l In the networking scenario where three or more SEP ring networks exist, this command must be run.
If this command is not run, the default interval for suppressing TC notification packets is used.
l A longer interval ensures stable SEP operating but deteriorates the convergence performance.
10.5.3 Reporting Topology Changes of a Lower-Layer Network -
Enabling the Edge Devices in a SEP Segment to Process SmartLink
Flush Packets
In the networking where a host is connected to a SEP network by using a SmartLink group , if
the active/standby switchover of member interfaces in the SmartLink group occurs, the host
sends SmartLink Flush packets to inform the edge devices in the SEP segment of the switchover.
Therefore, the edge devices in the SEP segment must be able to process SmartLink Flush packets.
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
sep segment segment-id
A SEP segment is created and the view of the SEP segment is displayed.
Step 3 Run:
deal smart-link-flush
An edge device in a SEP segment is enabled to process SmartLink Flush packets.
Quidway S7700 Smart Routing Switch
Configuration Guide - Ethernet 10 SEP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
522
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