Huawei S3700-28TP-PWR-SI 02354133 User Manual
Product codes
02354133
the subring. This networking is applicable to the convergence of a dual-homing network.
Through this networking, the upstream links are backed up.
Through this networking, the upstream links are backed up.
Connecting RRPP Network with Other Networks
When an RRPP ring is adjacent to an Ethernet ring enabled with STP, only the tangent rings are
supported, but the intersecting rings are not supported. This prevents the conflict between RRPP
and STP if both of them calculate the interface status.
supported, but the intersecting rings are not supported. This prevents the conflict between RRPP
and STP if both of them calculate the interface status.
3.4 Smart Link
Smart Link is a flexible link backup mechanism, which provides an effective and reliable solution
for dual-homed networking. Compared with STP, Smart Link provides faster convergence
speed. On a dual-homed network, the configuration of Smart Link is simpler than the
configuration of RRPP.
for dual-homed networking. Compared with STP, Smart Link provides faster convergence
speed. On a dual-homed network, the configuration of Smart Link is simpler than the
configuration of RRPP.
Smart Link implements fast protective switchover when the active link fails on the dual-homed
network. In normal situations, there is an active link and a standby link in the two upstream links.
That is, one upstream interface is in Forwarding state, and the other is in Block state. When the
active link fails, the Smart Link group quickly switches traffic to the standby link.
network. In normal situations, there is an active link and a standby link in the two upstream links.
That is, one upstream interface is in Forwarding state, and the other is in Block state. When the
active link fails, the Smart Link group quickly switches traffic to the standby link.
Smart Link provides manual switchover and automatic switchover. When a link is faulty, the
Smart Link group sends Flush packets to neighboring devices, requesting the devices to update
their MAC tables and ARP tables.
Smart Link group sends Flush packets to neighboring devices, requesting the devices to update
their MAC tables and ARP tables.
When multiple devices at different layers are connected for convergence, Monitor Link that
adopts the interface association mechanism monitors upstream links. This improves the backup
function of Smart Link. When an upstream link is faulty, Monitor Link blocks the downstream
interface. After the upstream link recovers, the downstream interface is opened. This switches
traffic between different paths for transmission.
adopts the interface association mechanism monitors upstream links. This improves the backup
function of Smart Link. When an upstream link is faulty, Monitor Link blocks the downstream
interface. After the upstream link recovers, the downstream interface is opened. This switches
traffic between different paths for transmission.
3.5 SEP
The Smart Ethernet Protection (SEP) protocol is a ring network protocol applied to the link layer
of an Ethernet network. The SEP protocol works on the basis of SEP segments. An SEP segment
consists of a group of switching devices that are configured with the same SEP segment ID and
control VLAN ID.
of an Ethernet network. The SEP protocol works on the basis of SEP segments. An SEP segment
consists of a group of switching devices that are configured with the same SEP segment ID and
control VLAN ID.
Most metropolitan area networks (MANs) and enterprise intranets adopt the ring networking to
ensure high reliability. The services, however, are affected if any node on the ring fails.
Generally, a ring network adopts the Resilient Packet Ring (RPR) or Ethernet ring technology.
The costs of the RPR technology are high because it requires special hardware components. The
Ethernet ring is improved and its costs are low; therefore, more and more MANs and enterprise
intranets adopt the Ethernet ring.
ensure high reliability. The services, however, are affected if any node on the ring fails.
Generally, a ring network adopts the Resilient Packet Ring (RPR) or Ethernet ring technology.
The costs of the RPR technology are high because it requires special hardware components. The
Ethernet ring is improved and its costs are low; therefore, more and more MANs and enterprise
intranets adopt the Ethernet ring.
Huawei originates the SEP protocol, which achieves the protective switchover on the open ring
and closed ring and displays the uncertain blocked points or ring network topology. Compared
with other Ethernet ring technologies, SEP has the following advantages:
and closed ring and displays the uncertain blocked points or ring network topology. Compared
with other Ethernet ring technologies, SEP has the following advantages:
l
It can run on a network together with STP, RSTP, MSTP, and RRPP.
l
It solves the problem of unidirectional traffic.
S3700HI Ethernet Switches
Product Description
Product Description
3 Link Features
Issue 05 (2012-10-20)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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