Table 10-11 SEP topology change notification
SEP
Topology
Change
Notification
Scenario Description Solution
Topology
change
notification
from a lower-
layer network
to an upper-
layer network
Networking where a
SEP network is
connected to an
upper-layer network
running other
features such as
SEP, STP, RRPP
and SmartLink
l If the blocked interface in a
lower-layer SEP network is
manually changed, the topology
of the SEP segment changes.
Because the upper-layer
network cannot detect the
topology change, traffic is
interrupted.
l If an interface in a lower-layer
SEP network becomes faulty,
the topology of the SEP segment
changes but the upper-layer
network cannot detect the
change. As a result, traffic is
interrupted.
Configure
the SEP
topology
change
notification
function.
Networking
scenario where a
host is connected to
a SEP network by
using a SmartLink
group
During an active/standby
switchover of member interfaces in
the SmartLink group, the host sends
a SmartLink Flush packet to notify
the connected devices in the SEP
segment of the switchover.
If the connected devices in the SEP
segment cannot identify the
SmartLink Flush packet (that is, if
these connected devices in the SEP
segment cannot detect any topology
change of the lower-layer network),
traffic will be interrupted.
Enable the
edge devices
in the SEP
segment to
process
SmartLink
Flush
packets.
Topology
change
notification
from an upper-
layer network
to a lower-layer
network
Networking
scenario where a
SEP network is
connected to an
upper-layer network
configured with
CFM.
If a fault occurs on the upper-layer
network, the topology of that
network changes but the lower-
layer network cannot detect the
change. As a result, traffic is
interrupted.
Configure
association
between SEP
and CFM.
Pre-configuration Tasks
Before configuring the topology change notification function, complete the following tasks:
l Configuring Basic SEP Functions
l Specifying an Interface to Block
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.
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