General IP address queries refer to a type of message used in the Internet Group Management Protocol (IGMP), which is a TCP/IP network layer protocol. These queries are used for informing routers of the availability of multicast groups on the network. By default, the source IP address of IGMP general queries is the IP address of the current VLAN interface. Routers send these general queries to determine which hosts belong to multicast groups on the network segment. The IANA has assigned 126.96.36.199 as a general query address for IGMP version 1. The source IP address for IGMP general queries can be configured to avoid issues related to the default address. The purpose of these queries is to manage multicast group membership within a network.
To configure the source IP addresses for IGMP messages in a VLAN, you can use the following syntax:
interface vlan <vlan-id>
ip address <ip-address> <subnet-mask>
igmp-snooping general-query source-ip <ip-address>
igmp-snooping report source-ip <ip-address>
These commands allow you to set the source IP addresses for various types of IGMP messages in a specific VLAN on Cisco and HPE switches.
To troubleshoot IGMP issues in a VLAN, you can follow the guidelines and commands from the search results:
To verify if IGMP snooping is enabled on a VLAN interface, you can use the following commands:
display igmp-snooping vlan <vlan-id> configuration
ip igmp snooping vlan enable
By using these commands, you can verify the IGMP snooping configuration on the respective switch platforms.
The command to disable IGMP snooping on a VLAN interface varies depending on the device. Here are the commands for different platforms:
no ip igmp snooping vlan <vlan-id>
undo igmp-snooping enable
By using these commands, you can disable IGMP snooping on the specified VLAN for Cisco and H3C devices.
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