Chapter 14: IGMP Snooping Querier
162
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 61. 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 61. 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
Содержание AT-8100L/8POE
Страница 4: ......
Страница 10: ...Contents 10...
Страница 14: ...Figures 14...
Страница 22: ...Chapter 1 AT 8100 Series Version 2 2 5 0 Web Browser Interface 22...
Страница 84: ...Chapter 5 Setting Port Statistics 84...
Страница 90: ...Chapter 6 Port Mirroring 90 6 Click Apply 7 Click SAVE to save your changes to the startup configuration file...
Страница 92: ...Chapter 6 Port Mirroring 92...
Страница 100: ...Chapter 7 Spanning Tree Protocol on a Port 100...
Страница 120: ...Chapter 9 Link Aggregation Control Protocol LACP 120...
Страница 130: ...Chapter 10 Setting Static Port Trunks 130...
Страница 148: ...Chapter 12 Spanning Tree Protocols on the Switch 148...
Страница 158: ...Chapter 13 Internet Group Management Protocol IGMP Snooping 158...
Страница 168: ...Chapter 14 IGMP Snooping Querier 168...
Страница 178: ...Chapter 15 Power Over Ethernet PoE 178...
Страница 230: ...Chapter 19 Setting IPv4 and IPv6 Addresses 230...
Страница 242: ...Chapter 20 Access Control Lists ACL 242...
Страница 246: ...Chapter 21 Setting Static Routes 246 8 Click Apply 9 Click SAVE...
Страница 250: ...Chapter 21 Setting Static Routes 250...
Страница 319: ...AT 8100 Series Version 2 2 5 0 Web Interface User s Guide 319 Model Name Asset ID...
Страница 320: ...Chapter 25 LLDP and LLDP MED 320...