Applicable Models

• QSW-M7308R-4X
• QSW-M3224-24T
• QSW-M3212R-8S4T
• QSW-M3216R-8S8T
• QSW-IM3216R-8S8T

Important Notice

Configuration Requirements for Priority-Based Flow Control (PFC)

• After updating to QSS Pro 4.2.0, you can enable priority-based flow control (PFC) to minimize packet loss during congestion. Enabling PFC automatically activates LLDP, and enabling QoS is strongly recommended to ensure correct and optimal operation."

New Features

Lossless Networking with Priority-Based Flow Control (PFC)

• QSS Pro now supports priority-based flow control (PFC), which enables lossless queues to prevent packet loss during periods of congestion. This feature lays the foundation for intelligent, lossless Ethernet networks."

Manage Congestion Proactively with ECN

• QSS Pro now supports explicit congestion notification (ECN), which enables the switch to signal congestion to the sender. This allows the sender to reduce the transmission rate proactively, minimizing the risk of packet loss.

User Interface Enhancement

• The updated user interface introduces customizable table content, batch port configuration, adjustable column widths, and improved sorting capabilities. These enhancements simplify configuration and improve operational efficiency.

IGMP Support for MC-LAG

• This update adds IGMP support for multi-chassis link aggregation (MC-LAG), enabling more efficient multicast traffic handling while maintaining redundancy and load balancing.

Support for PTP Transparent Clock Support for QSW-M3224-24T

• The QSW-M3224-24T now supports precision time protocol (PTP) Transparent Clock, enabling accurate time synchronization across network devices and improving timing precision in distributed systems.

Fixed Issues

• Fixed an issue where switches configured with MC-LAG occasionally displayed incorrect peer link names on the IGMP Snooping Statistics page after receiving join packets.
• Addressed an issue where disconnecting and reconnecting MC-LAG-enabled group ports caused multicast traffic to stop forwarding to clients and prevented IGMP snooping statistics from updating.
• Fixed an issue where clients sending IGMP join packets from a LAG port connected to one MC-LAG-enabled switch failed to receive multicast traffic from a source connected to the peer switch in the MC-LAG pair.
• Fixed an issue where MC-LAG-enabled switches continued to send group-specific IGMP queries periodically after receiving a join message, even when no leave message was sent by the client.
• Fixed an issue where the web interface did not display the prompt informing users that LLDP is automatically enabled when PFC was enabled.
• Resolved an issue where the PFC synchronization status was not correctly updated after configuring the PFC state on the corresponding port.
• Fixed an issue where assigning a CoS queue value to a PFC-enabled port caused the outgoing LLDP packets to omit the correct PFC priority values.
• Fixed an issue where PFC settings remained configurable on a physical port after it was added to a LAG group or designated as an MC-LAG peer link.
• Fixed an issue where the system applied a previously configured CoS queue when PFC was enabled without explicitly specifying a new CoS queue.
• Fixed an issue where ports with differing PFC settings could not be added to the same LAG group, even though such configuration is permitted by design.
• Fixed an issue where the MC-LAG member selection prompt displayed an incorrect restriction message when PFC was enabled on a port.
• Fixed an issue where PFC settings were still available for configuration on a LAG interface, even though flow control was already enabled.
• Fixed an issue where ports failed to reduce the transmission rate of PFC traffic for a given class of service (CoS) during network congestion.
• Fixed an issue where the QoS page became unresponsive and remained in a loading state when PFC was enabled.
• Resolved an issue where the switch sent pause frames requesting traffic suspension across all priority classes during congestion, instead of limiting the pause request to the CoS queue specified in the PFC configuration.
• Fixed an issue where the ECN page did not display the intended feature description and showed incorrect configuration guidance.
• Fixed an issue where ECN settings remained configurable on individual ports after they were added to a LAG group or designated as an MC-LAG peer link.
• Fixed an issue where the switch failed to mark packets for congestion (ECN-CE) when port traffic exceeded 95% bandwidth, preventing the receiver from detecting network congestion.
• Fixed an issue where ports with differing ECN settings could not be added to the same LAG group.
• Fixed an issue on QSW-M7308R switches where setting the FEC mode to auto-negotiation on ports 1-4 triggered an unexpected error message.
• Fixed an issue where reverting modified PTP settings to their original values caused test failures due to configuration inconsistencies.
• Fixed an issue where configuring the DNS server with the IP address 1.0.0.0 caused a configuration failure.
• Fixed an issue where the MC-LAG page temporarily failed to display the correct configuration information for a few seconds after logging in.
• Addressed a case where unsaved changes to the global MC-LAG setting were not flagged when switching tabs.
• Addressed a configuration issue where the peer link was incorrectly released for use by other functions if MC-LAG settings were edited without rebooting.
• Addressed an issue where the system incorrectly reported a missing DNS configuration when only DNS Server 2 was set in OOB mode during time server synchronization.
• Resolved a performance issue in the AMIZcloud registration wizard where delayed page transitions triggered a connection timeout message.
• Fixed an issue where binding to AMIZcloud caused cloud agent processes to accumulate over time without termination, leading to zombie processes.
• Addressed an issue where the port failed to initiate pause frame signaling under congestion conditions when flow control was enabled for both transmission and reception.
• Fixed an issue where Wake-on-LAN (WOL) failed when the QSW-M3224 was connected to network interface cards using either the RTL-8125 or AQC-113C chipset.
• Fixed an issue where disabling a LAG port on one switch during active network traffic testing caused the client IP address to become unreachable via ping.
• Fixed an issue where a switch with MC-LAG enabled continued to send group-specific queries even after receiving a join message from the client without a corresponding leave message.
• Resolved an issue where QoS failed to apply weighted traffic distribution under specific configuration and congestion scenarios.
• Resolved an issue where the myQNAPcloud organization view showed an incorrect icon for the QSW-M3212R switch.
• Fixed an issue where disabling an SFP port after it linked up at 1G speed caused the LED to remain orange and the peer device to continue displaying a link-up status.
• Resolved an issue that prevented the MAC address table filter from returning results for partial MAC address inputs.
• Fixed an issue where VLAN ID and group list information did not load immediately on the IGMP Snooping Statistics page.
• Fixed an issue where the group information label was not displayed on the IGMP Snooping Statistics page when no group data was available.
• Resolved an issue that caused the system to revert to SNMPv2 when the Enable Privacy option was disabled in SNMPv3 settings.
• Resolved an issue that prevented users from editing the LAG state and name fields in Port Configuration when the LAG group contained no member ports.
• Resolved an issue where the flow control field in Port Configuration was not configurable on switches running only the QSS firmware.
• Resolved a validation issue that allowed the DHCP server's primary and secondary DNS servers to share the same IP address.
• Fixed an issue on QSS Pro devices where disabling in-band management did not block IPv6 access to the device interface, and the link status was still displayed as active.
• Addressed an issue where system-generated DHCP default and connected routes were incorrectly editable and removable.
• Fixed an issue on the IPv6 static default route modification page where the Default Route checkbox appeared unchecked, preventing updates to the gateway IP address.
• Fixed an issue where modifying only the VLAN ID in an IPv6 static route with a link-local gateway did not enable the Save button.
• Resolved an issue where enabling only the global port mirroring setting following a firmware update caused the web interface to become unresponsive.
• Resolved an issue where the ECN setting for LAG interfaces was not retained after reboot and was incorrectly shown as disabled.
• Fixed an issue where certain lists were limited to displaying a maximum of 50 entries, even when additional records were available. The issue affected the following pages: VLAN list, IPv4 and IPv6 routing tables, IGMP snooping settings, and IPv6 interface settings.
• Fixed the QNAP Organization Center link in the AMIZcloud registration wizard, which previously directed to an incorrect URL.
• Fixed an issue that prevented access to QSS and QSS Pro via myQNAPcloud using the device IP address when HTTPS was disabled on the switch.
• Fixed a stability issue where changing the time settings after switching to Cloud Management mode could occasionally cause the web interface to crash.
• Fixed an issue where enabling PFC on one port unintentionally altered the flow control status of other ports.