Allied Telesis AT-8100S/24C Guia do Utilizador Página 174
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Chapter 14: IGMP Snooping Querier
174
with the second lowest IP address is made the standby querier, again by
switch 2. In the case where there are three queriers, the switch in the
network with IGMP snooping enabled and IGMP querier disabled
determines the standby querier and then the second standby querier by
comparing their IP addresses.
The following example consists of a LAN with three switches. See
Figure 62. IGMP snooping is enabled on all three switches. However,
IGMP snooping querier is enabled on switches 1 and 3. Switch 2
determines that switch 1 has the lowest IP routing address and forwards
all multicast packets to switch 1, making switch 1 the active querier.
Switch 3 becomes the standby querier in case switch 1 stops transmitting
query packets.
Note
Switches 1 and 3 are only sending queriers. Neither switch detects
nor displays an opposing querier.
Figure 62. IGMP Snooping Querier with Two Queriers
Multicast source:
IP address: 149.123.48.1
Switch 1:
VLAN: Default_VLAN
Routing interface:
149.123.48.2
Host nodes:
IP addresses:
149.123.48.3 to 149.123.48.24
Host nodes with IP addresses:
149.123.48.41 to 149.123.48.62
Switch 3:
VLAN: Default_VLAN
Routing interface:
149.123.48.4
Switch 2:
VLAN: Default_VLAN
Routing interface:
149.123.48.3
Host nodes:
IP addresses:
149.123.48.25 to 149.123.48.40
- AT-8100 Series 1
- Copyright 2
- Contents 10
- Document Conventions 16
- Contacting Allied Telesis 18
- Chapter 1 19
- Management Sessions 20
- Web Manager Accounts 21
- Starting a Management Session 23
- Figure 1. Login Page 26
- Logging on to the Switch 27
- What to Configure First 30
- Setting System 31
- When You Do 32
- Not Know the IP 32
- Address of the 32
- Baud rate: 9600 33
- Data bits: 8 33
- Parity: None 33
- Stop bits: 1 33
- Flow control: None 33
- Enabling HTTP 35
- Service in the 35
- Saving your 36
- Changes in the 36
- Saving Your Changes 37
- 8 on page 37 38
- Chapter 3 39
- Configuring an 40
- SNTP or NTP 40
- Time Manually 42
- Deleting a 52
- Managing Local User Accounts 53
- Changing a User 55
- Password 55
- Changing the 56
- User Privilege 56
- Deleting a User 57
- 5. Click Delete User 58
- Rebooting a Switch 59
- Upgrading the Software 60
- Default Values 63
- Displaying System Information 64
- Chapter 4 67
- Port Numbers on the Switch 68
- Changing the Port Settings 72
- Chapter 5 81
- Displaying Port Statistics 82
- Receive Statistics 83
- Transmit 85
- Statistics 85
- Interface 87
- Clearing Port Statistics 89
- Reloading Statistics 90
- Chapter 6 91
- Chapter 6: Port Mirroring 94
- Assigning a Destination Port 95
- Chapter 7 99
- Overview 100
- Chapter 8 107
- Chapter 9 117
- Displaying LACP Trunks 119
- Adding an LACP Trunk 121
- Modifying an LACP Trunk 123
- Deleting an LACP Trunk 125
- Chapter 10 127
- Adding Static Trunks 131
- Deleting Static Trunks 137
- Chapter 11 139
- Tagged and 141
- Untagged Ports 141
- Displaying VLANs 142
- Adding an VLAN 143
- Modifying VLANs 145
- Assigning a Native VLAN 148
- Deleting VLANs 152
- Chapter 12 153
- Chapter 13 159
- Disabling IGMP Snooping 164
- Displaying the Routers List 165
- IGMP query from it 166
- Clearing the Routers List 167
- Displaying the Hosts List 168
- Chapter 14 171
- Assigning 173
- Multiple Queriers 173
- .2 Enabled Enabled Active 175
- .3 Enabled Disabled None 175
- .4 Enabled Enabled Standby 175
- Guidelines 176
- VLAN— Indicates the VLAN ID 178
- 5. Click Apply 180
- 6. Click SAVE 180
- Chapter 15 181
- Prioritization 183
- Displaying PoE Port Settings 184
- Chapter 16 191
- Chapter 17 199
- Server 1 202
- Configuring 203
- Remote Manager 203
- Authentication 203
- Using RADIUS 203
- Adding a 206
- RADIUS Server 206
- Using TACACS+ 208
- Chapter 18 215
- Authenticator Role: 217
- Single host mode 217
- Multiple host mode 218
- Multiple supplicant mode 218
- Dynamic VLAN 219
- Assignments 219
- Authenticator 223
- Chapter 19 229
- IP Management 231
- Displaying IPv4 Interfaces 232
- Adding an IPv4 Address 234
- 5. Click Add 235
- Changing an IPv4 Address 236
- Deleting an IPv4 Address 238
- Displaying the IPv6 Interface 239
- Adding an IPv6 Address 241
- Changing IPv6 Addresses 243
- Deleting IPv6 Addresses 245
- Chapter 20 247
- Creating an ACL 251
- Assigning an ACL to Ports 255
- Displaying a List of ACLs 257
- Chapter 21 259
- Displaying Static Routes 260
- Adding a Static Route 262
- Deleting a Static Route 264
- Displaying the Routing Table 265
- Chapter 22 267
- Creating a QoS Policy 271
- Chapter 23 279
- Changing the RIP Settings 286
- Displaying RIP Statistics 288
- Reloading RIP Statistics 290
- Chapter 24 291
- Displaying the ARP Table 293
- Adding a Static ARP Entry 295
- Deleting ARP Entries 297
- Chapter 25 299
- Optional LLDP-MED TLVs 301
- Chapter 25: LLDP and LLDP-MED 302
- Disabling LLDP on the Switch 305
- Configuring LLDP on a Port 306
- Selecting LLDP TLVs on a Port 308
- Figure 128. LLDP TLV Page 309
- 5. Click Edit 309
- Creating a Civic 312
- Location Entry 312
- Figure 130. Locations Tab 313
- Creating a 316
- Coordinate 316
- Location 316
- Displaying LLDP Statistics 329
- Tab selected 331
- Displaying Location Entries 332
- Displaying 333
- Locations 333
- Displaying ELIN 334
- Displaying the 335
- Basic LLDP 335
- Configuration 335
- Displaying LLDP 336
- Port Assignments 336
- Displaying Port 337
- LLDP-MED TLV 339
- - Model Name 340
- - Asset ID 340
- Chapter 26 341
- Configuring sFlow on a Port 344
- Chapter 26: sFlow 346
- Enabling sFlow on the Switch 348
- Displaying the sFlow Settings 349
- End of Document 350
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