Netgear XSM4324FS Product Data Sheet - Page 15

Data Sheet | M4300 series Intelligent Edge Managed Switches Flow Control 802.3x Flow Control implementation per IEEE 802.3 Annex 31B specifications with Symmetric flow control, Asymmetric flow control or No flow control Allows traffic from one device to be throttled for a specified period of time: a device that wishes to inhibit transmission of data frames from another device on the LAN transmits a PAUSE frame The Priority Flow Control (PFC) is standardized by the IEEE 802.1Qbb specification and enables flow control per traffic class on IEEE 802 full-duplex links • Asymmetric flow control allows the switch to respond to received PAUSE frames, but the ports cannot generate PAUSE frames • Symmetric flow control allows the switch to both respond to, and generate MAC control PAUSE frames • A device that wishes to inhibit transmission of data frames from another device on the LAN transmits a PAUSE frame • By pausing congested priorities independently, highly loss sensitive protocols can share the same link with traffic that has different loss tolerances • The priorities are differentiated by the priority field of the 802.1Q VLAN header • PFC uses a new control packet defined in 802.1Qbb and therefore disables 802.3x standard flow control on PFC configured interfaces • PFC comes with CLI configuration and it is only supported on M4300-12X12F, 24X, 24X24F, 48X and 96X models UDLD Support UDLD implementation detects unidirectional links physical ports (UDLD must be enabled on both sides of the link in order to detect an unidirectional link) • UDLD protocol operates by exchanging packets containing information about neighboring devices • The purpose is to detect and avoid unidirectional link forwarding anomalies in a Layer 2 communication channel Both "normal-mode" and "aggressive-mode" are supported for perfect compatibility with other vendors implementations, including port "D-Disable" triggering cases in both modes M4300-24X M4300-48X M4300-16X M4300-24XF M4300-48XF M4300-8X8F M4300-12X12F M4300-24X24F M4300-28G M4300-52G M4300-28G-PoE+ M4300-52G-PoE+ M4300-96X M4300-24X M4300-48X M4300-16X M4300-24XF M4300-48XF M4300-8X8F M4300-12X12F M4300-24X24F M4300-28G M4300-52G M4300-28G-PoE+ M4300-52G-PoE+ M4300-96X PAGE 15 of 60