Does an S series switch sends a Report message after receiving a Query message

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If only IGMP snooping is enabled, an S series switch does not send Report messages after receiving Query messages. If IGMP snooping proxy or IGMP snooping Report suppression is also configured, the switch can construct and send Report messages according to existing entries after receiving Query messages.

Other related questions:
What is the function of the interval for sending Query messages on an S series switch?
For an S series switch, the interval for sending Query messages configured in a VLAN using the igmp-snooping query-interval command is used to: - Control the interval at which Query messages are sent after the querier function is enabled in the VLAN. - Calculate the aging time of dynamic member ports using the following formula: Aging time = Robustness variable x Query interval + Maximum response time Therefore, the interval is useful even when IGMP snooping querier is not enabled. In addition, you must configure the same interval on all devices when configuring IGMP snooping. Otherwise, some user-side interfaces may be incorrectly deleted, causing multicast forwarding interruption.

How does the S series switch receive the routing protocol message?
When the S-series and E-series switches receive the protocol packets, the main control board (CPU) and the main control board (CPU) complete the related calculation and send the control message to update the routing information of the service board

Is the same interval for sending General Query messages required on S series switches
The interval for sending General Query messages is an important parameter used to calculate the aging time of multicast forwarding entries. When configuring this parameter on a multicast network, you are advised to configure the same value on all the devices. If multicast devices use different intervals, valid multicast forwarding entries may be aged out incorrectly, causing multicast traffic interruption. Devices from different vendors use different default intervals. When a network has devices from different vendors, configure the same interval on these devices. The default interval on S series switches is as follows: - IGMP: 60s on S series switches and E600 fixed switches - IGMP snooping: 60s on S series modular switches and 125s on S series and E600 fixed switches - MLD: 125s on S series switches and E600 fixed switches - MLD snooping: 60s on S series modular switches and 125s on S series and E600 fixed switches

Why Does the Subscriber Fail to Receive Messages After I Publish Messages to the Topic?

After subscribing to a topic, the subscriber receives a confirmation notification. If not confirming the subscription, the subscriber cannot receive messages you published to the topic.


Why does a BGP peer send an open message twice on S series switches
The two peers that set up a BGP session are not of the master and slave relationship. Both the two peers attempt to set up a connection. A peer initiatively sends an Open message to set up a BGP connection, and replies with an Open message after receiving the Open message from its peer. During the negotiation, a connection is closed. As a result, a BGP peer may send an Open message twice.

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