ZL50409
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Data Sheet
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Smooth out traffic to uplink port
Ingress Rate Control
- Back pressure
- Flow Control
- WRED (Weighted Random Early Discard)
• Egress Rate Control
• Down to 16 kbps Rate Control granularity
Per queue traffic shaper on uplink port
Packet Filtering and Port Security
• Static address filtering for source and/or destination MAC
• Static MAC address not subject to aging
• Secure mode freezes MAC address learning (each port may independently use this mode)
• Supports port authentication (IEEE 802.1x)
QoS Support
• Supports IEEE 802.1p/Q Quality of Service with 2 transmission priority queues (4 for uplink port), with
strict priority and/or WFQ service disciplines
• Provides 2 levels of dropping precedence with WRED mechanism
• User controls the WRED thresholds.
• Buffer management: per class and per port buffer reservations
• Port-based priority: VLAN priority in a tagged frame can be overwritten by the priority of Port VLAN ID
Supports per-system option to enable flow control for best effort frames even on QoS enabled ports
Classification based on:
• Port based priority
• VLAN Priority field in VLAN tagged frame
• DS/TOS field in IP packet
• UDP/TCP logical ports: 8 hard-wired and 8 programmable ports, including one programmable range
The precedence of the above classifications is programmable
Supports IEEE 802.3ad link aggregation
• Up to 8 trunk groups, with up to 8 ports per group
• Supports load sharing among trunk ports based on:
- Source port
- Source and/or destination MAC address
Supports module hot swap on all ports
MIB Statistics counters for all ports
Full Duplex Ethernet IEEE 802.3x Flow Control
Backpressure flow control for Half Duplex ports
Hardware auto-negotiation through MII management interface (MDIO) for Ethernet ports
Built-in reset logic triggered by system malfunction
Built-In Self Test for internal SRAM
IEEE-1149.1 (JTAG) test port
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Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
