Functions of suppress-time on S series switches

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For an S series switch, to protect an upstream Layer 3 device from attacks and reduce the loads on the Layer 3 device, a Layer 2 device can suppress repeated IGMP Report and IGMP Leave messages sent from users in a VLAN. The message suppression mechanism is as follows:

- After receiving and forwarding an IGMP Report/Leave message, the Layer 2 device does not forward repeated MLD Report messages to the router port within the suppression time.
- If the Layer 2 device receives an IGMP General Query message or Multicast-Address-Specific message within the suppression time, it does not suppress the first IGMP Report message sent in response to the General Query message. In addition, the Layer 2 device resets the suppression timer when receiving the first IGMP Report message.

suppress-time is used to set the suppression time of Report/Leave messages. By default, the suppression time for IGMP Report/Leave messages is 10s. If the suppression time is set to 0, Report/Leave messages are not discarded. The suppression function applies only to IGMPv1 and IGMPv2 Report/Leave messages and is invalid for IGMPv3 Report/Leave messages.

Other related questions:
Functions of suppress-time on S series switches
For an S series switch, to protect an upstream Layer 3 device from attacks and reduce the loads on the Layer 3 device, a Layer 2 device can suppress repeated IGMP Report and IGMP Leave messages sent from users in a VLAN. The message suppression mechanism is as follows: - After receiving and forwarding an IGMP Report/Leave message, the Layer 2 device does not forward repeated MLD Report messages to the router port within the suppression time. - If the Layer 2 device receives an IGMP General Query message or Multicast-Address-Specific message within the suppression time, it does not suppress the first IGMP Report message sent in response to the General Query message. In addition, the Layer 2 device resets the suppression timer when receiving the first IGMP Report message. suppress-time is used to set the suppression time of Report/Leave messages. By default, the suppression time for IGMP Report/Leave messages is 10s. If the suppression time is set to 0, Report/Leave messages are not discarded. The suppression function applies only to IGMPv1 and IGMPv2 Report/Leave messages and is invalid for IGMPv3 Report/Leave messages.

Differences between suppress-time and report-suppress on an S series switch
For S series switches, suppress-time and report-suppress are irrelevant. The suppress-time parameter specifies the period during which the switch forwards only one Report/Leave message of the same multicast group after receiving a Query message. The report-suppress parameter is used to terminate Report messages from users and respond to the Query packets from routers.

Traffic suppression module of S series switch
S series switches support the configuration of traffic suppression on the interface. Flow suppression contains three modes: Packet flow rate suppression Bit rate of flow suppression Percentage flow suppression Note: the cassette switch, only partial morphological support by bit rate traffic control.

Traffic suppression modes for S series switches
Traffic suppression can be configured on interfaces of S series switches. Traffic suppression has the following modes: By number of packets per second (pps) By number of bits per second (bit/s) By bandwidth percentage Note: Only some S series fixed switch models support traffic suppression by number of bits per second (bit/s).

ERPS switching time of S series switches
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