Huawei S Series White Paper

S Series Switches
iStack Technology White Paper
2 Technology Description
Issue 01 (2013-05-25)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11
Ring Topology
Chain Topology
Disadvantages
Does not apply to
long-distance stacking
because the member
devices need to be
physically connected to
each other.
Provides low reliability. When a stack
link fails, the stack cannot work properly
and some devices cannot work.
The entire stack has only one path,
reducing the stack link bandwidth usage.
Recommended
scenarios
To ensure reliability, the
ring topology is
recommended in scenarios
where the distance between
member devices is short.
The chain topology is recommended in
scenarios where the distance between
member devices is long because the ring
topology is difficult to deploy.
2.2 Stack Packets
The stack packet format varies slightly according to the version. The following uses the stack
packet format in V200R003 as an example.
2.2.1 Stack Packet Header
Table 2-2 Stack packet header
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
0 1 2 3 4 5 6 7
Dst MAC [4]
Dst MAC [2]
Src MAC [2]
Src MAC [4]
VLAN Tag
EthType 0x5100
Version
ProtoType
Resv
SrcFPort
SrcStackId
DesStackId
Length
Resv
Packet Data

Huawei S Series Specifications

General

Brand	Huawei
Model	S Series
Category	Switch
Language	English