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Stack Introduction, Master, Stack Member, Merge, Split

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 Stack Introduction 1. Stack Elements 1） Stack Role Each device in the stack system is called stack member. Each stack member processes services packets and plays a role which is either master or stack member in the stack system. The differences between master and stack member are described as below: • Master: Indicates the device is responsible for managing the entire stack system. • Stack Member: Indicates the device provides backup for the master. If the master fails, the stack will elect a new master from the remaining stack members to succeed the previous master. 2） Stack Event Stack event indicates the global events which might happen during stack operation process, with two options: • Merge: It occurs when two independent stacks merge into one stack because of stack link establishment, as shown in the following figure: Figure 5-4 Stack Merge When stack merge occurs, the previous masters compete to be the new master. The stack members of the defeated stack will join the winner stack as a stack member to form a new stack. Master will assign Unit Number to the newly joined members, and the newly joined stack member will restart with the stack master's global configuration. • Split: It occurs when stack splits into two or more stacks because of stack link failures, as shown in the following figure: Figure 5-5 Stack Split After stack partition occurs, each newly established stack elects their own new master and use the MAC address of the master as its stack MAC address. However, stack partition probably brings about routing and forwarding problems on the network since the partitioned stacks keep operating with the previous IP address by default, which results in same IP address being reused in the same LAN. 2. Operation Procedure Stack management involves these four stages: Connecting the stack members, Topology collection, Master election, and Stack management and maintenance. 46

Section	Page
Package Contents	11
Chapter 1 About this Guide	12
1.1 Intended Readers	12
1.2 Conventions	12
1.3 Overview of This Guide	12
Chapter 2 Introduction	16
2.1 Overview of the Switch	16
2.2 Appearance Description	16
2.2.1 Front Panel	16
2.2.2 Rear Panel	17
Chapter 3 Login to the Switch	19
3.1 Login	19
3.2 Configuration	20
Chapter 4 System	21
4.1 System Info	21
4.1.1 System Summary	21
4.1.2 Device Description	24
4.1.3 System Time	24
4.1.4 Daylight Saving Time	25
4.1.5 System IPv6	26
4.2 User Management	35
4.2.1 User Table	35
4.2.2 User Config	35
4.3 System Tools	36
4.3.1 Boot Config	37
4.3.2 Config Restore	38
4.3.3 Config Backup	38
4.3.4 Firmware Upgrade	39
4.3.5 System Reboot	39
4.3.6 System Reset	40
4.4 Access Security	40
4.4.1 Access Control	40
4.4.2 HTTP Config	42
4.4.3 HTTPS Config	42
4.4.4 SSH Config	45
4.4.5 Telnet Config	52
4.5 SDM Template	52
4.5.1 SDM Template Config	52
Chapter 5 Stack	54
5.1 Stack Management	61
5.1.1 Stack Info	61
5.1.2 Stack Config	62
5.2 Application Example for Stack	64
Chapter 6 Switching	65
6.1 Port	65
6.1.1 Port Config	65
6.1.2 Port Mirror	66
6.1.3 Port Security	68
6.1.4 Port Isolation	70
6.1.5 Loopback Detection	71
6.2 LAG	73
6.2.1 LAG Table	74
6.2.2 Static LAG	75
6.2.3 LACP Config	76
6.3 Traffic Monitor	78
6.3.1 Traffic Summary	78
6.3.2 Traffic Statistics	79
6.4 MAC Address	81
6.4.1 Address Table	82
6.4.2 Static Address	83
6.4.3 Dynamic Address	84
6.4.4 Filtering Address	86
Chapter 7 VLAN	88
7.1 802.1Q VLAN	89
7.1.1 VLAN Config	90
7.1.2 Port Config	91
7.2 Application Example for 802.1Q VLAN	93
7.3 MAC VLAN	94
7.3.1 MAC VLAN	95
7.3.2 Port Enable	95
7.4 Application Example for MAC VLAN	96
7.5 Protocol VLAN	98
7.5.1 Protocol Group Table	99
7.5.2 Protocol Group	99
7.5.3 Protocol Template	100
7.6 Application Example for Protocol VLAN	102
Chapter 8 Spanning Tree	104
8.1 STP Config	109
8.1.1 STP Config	109
8.1.2 STP Summary	111
8.2 Port Config	112
8.3 MSTP Instance	113
8.3.1 Region Config	114
8.3.2 Instance Config	114
8.3.3 Instance Port Config	115
8.4 STP Security	117
8.4.1 Port Protect	117
8.4.2 TC Protect	120
8.5 Application Example for STP Function	120
Chapter 9 Multicast	125
9.1 IGMP Snooping	129
9.1.1 Snooping Config	131
9.1.2 Port Config	133
9.1.3 VLAN Config	134
9.1.4 Multicast VLAN	135
9.1.5 Querier Config	138
9.1.6 Profile Config	140
9.1.7 Profile Binding	141
9.1.8 Packet Statistics	143
9.2 MLD Snooping	144
9.2.1 Snooping Config	146
9.2.2 Port Config	148
9.2.3 VLAN Config	149
9.2.4 Multicast VLAN	150
9.2.5 Querier Config	151
9.2.6 Profile Config	153
9.2.7 Profile Binding	154
9.2.8 Packet Statistics	156
9.3 Multicast Table	157
9.3.1 IPv4 Multicast Table	157
9.3.2 Static IPv4 Multicast Table	158
9.3.3 IPv6 Multicast Table	159
9.3.4 Static IPv6 Multicast Table	160
Chapter 10 Routing	162
10.1 Interface	162
10.2 Routing Table	165
10.3 Static Routing	166
10.4 ARP	167
10.4.1 ARP Table	167
10.4.2 Static ARP	167
Chapter 11 QoS	169
11.1 DiffServ	172
11.1.1 Port Priority	172
11.1.2 Schedule Mode	173
11.1.3 802.1P Priority	174
11.1.4 DSCP Priority	175
11.2 Bandwidth Control	177
11.2.1 Rate Limit	177
11.2.2 Storm Control	178
11.3 Voice VLAN	179
11.3.1 Global Config	181
11.3.2 Port Config	182
11.3.3 OUI Config	183
Chapter 12 ACL	185
12.1 Time-Range	185
12.1.1 Time-Range Summary	185
12.1.2 Time-Range Create	186
12.1.3 Holiday Config	187
12.2 ACL Config	187
12.2.1 ACL Summary	187
12.2.2 ACL Create	188
12.2.3 MAC ACL	188
12.2.4 Standard-IP ACL	189
12.2.5 Extend-IP ACL	190
12.3 Policy Config	191
12.3.1 Policy Summary	191
12.3.2 Policy Create	191
12.3.3 Action Create	192
12.4 ACL Binding	192
12.4.1 Binding Table	193
12.4.2 Port Binding	194
12.4.3 VLAN Binding	195
12.5 Policy Binding	195
12.5.1 Binding Table	196
12.5.2 Port Binding	197
12.5.3 VLAN Binding	198
12.6 Application Example for ACL	198
Chapter 13 Network Security	201
13.1 IP-MAC Binding	201
13.1.1 Binding Table	201
13.1.2 Manual Binding	202
13.1.3 ARP Scanning	204
13.2 DHCP Snooping	206
13.2.1 Global Config	209
13.2.2 Port Config	210
13.3 ARP Inspection	211
13.3.1 ARP Detect	215
13.3.2 ARP Defend	216
13.3.3 ARP Statistics	217
13.4 DoS Defend	218
13.4.1 DoS Defend	220
13.5 802.1X	220
13.5.1 Global Config	224
13.5.2 Port Config	225
13.5.3 RADIUS Config	227
Chapter 14 SNMP	229
14.1 SNMP Config	231
14.1.1 Global Config	231
14.1.2 SNMP View	232
14.1.3 SNMP Group	233
14.1.4 SNMP User	234
14.1.5 SNMP Community	236
14.2 Notification	238
14.3 RMON	240
14.3.1 Statistics	241
14.3.2 History	242
14.3.3 Event	243
14.3.4 Alarm Config	244
Chapter 15 Maintenance	246
15.1 System Monitor	246
15.1.1 CPU Monitor	246
15.1.2 Memory Monitor	247
15.2 Log	247
15.2.1 Log Table	248
15.2.2 Local Log	249
15.2.3 Remote Log	250
15.2.4 Backup Log	250
15.3 Device Diagnostics	251
15.3.1 Cable Test	251
15.4 Network Diagnostics	252
15.4.1 Ping	253
15.4.2 Tracert	253
Appendix A: Specifications	255

Match case Limit results 1 per page



Stack Introduction

1. Stack Elements

）

Stack Role

Each device in the stack system is called stack member. Each stack member processes

services packets and plays a role which is either master or stack member in the stack system.

The differences between master and stack member are described as below:

•

Master:

Indicates the device is responsible for managing the entire stack system.

•

Stack Member:

Indicates the device provides backup for the master. If the master fails,

the stack will elect a new master from the remaining stack members to succeed the

previous master.

）

Stack Event

Stack event indicates the global events which might happen during stack operation process,

with two options:

•

Merge:

It occurs when two independent stacks merge into one stack because of stack link

establishment, as shown in the following figure:

Figure 5-4 Stack Merge

When stack merge occurs, the previous masters compete to be the new master. The stack

members of the defeated stack will join the winner stack as a stack member to form a new

stack. Master will assign Unit Number to the newly joined members, and the newly joined

stack member will restart with the stack master’s global configuration.

•

Split:

It occurs when stack splits into two or more stacks because of stack link failures, as

shown in the following figure:

Figure 5-5 Stack Split

After stack partition occurs, each newly established stack elects their own new master and

use the MAC address of the master as its stack MAC address. However, stack partition

probably brings about routing and forwarding problems on the network since the

partitioned stacks keep operating with the previous IP address by default, which results in

same IP address being reused in the same LAN.

2. Operation Procedure

Stack management involves these four stages: Connecting the stack members, Topology

collection, Master election, and Stack management and maintenance.