The LW3008C is a compact GPON Optical Line Terminal (OLT) system designed for Gigabit Passive Optical Network (GPON) and Ethernet services, providing solutions for voice, data, and video. It features 8 GPON interfaces and 4 optical 10GbE uplink ports on the front panel. The 10GbE interfaces can be used for uplinks to the core network or to cascade other switches or connect to a collocated DSLAM. For enhanced system reliability, it incorporates a dual power supply architecture, ensuring continuous operation even if one power unit fails.
Function Description:
The LW3008C acts as a Layer 3 switch, supporting various network functionalities. It terminates the PON layer and translates it to Ethernet uplink for transport within an Ethernet/IP environment. Key functions include:
- Virtual Local Area Network (VLAN): Divides a single network into multiple logical networks, preventing unnecessary packet accumulation and enhancing security. It supports 802.1Q tagged frames and up to 4096 VLANs, including port-based, protocol-based, MAC-based, and subnet-based VLANs.
- Quality of Service (QoS): Classifies incoming traffic and processes it according to user-defined policies, ensuring differentiated service levels. It supports ingress and egress rate limiting, and various scheduling types like Strict Priority (SP), Weighted Round Robin (WRR), and Deficit Round Robin (DRR) to manage traffic congestion and prioritize critical applications.
- IP Multicast: Facilitates efficient delivery of multicast packets to only interested member hosts, reducing network traffic. It supports IGMPv2, IGMP snooping, and PIM-SM for host membership management and multicast routing.
- IP Routing: Functions as a Layer 3 switch with a routing table and IP address, supporting static routing, OSPFv2, and BGPv4 for unicast routing.
- Dynamic Host Configuration Protocol (DHCP): Automatically assigns IP addresses to clients, allowing efficient utilization of limited IP resources through temporary IP leasing. It supports DHCP server, DHCP relay with Option 82, and DHCP client functionalities for both IPv4 and IPv6.
- Spanning Tree Protocol (STP): Prevents network loops and provides backup routes in Layer 2 networks. It supports STP (IEEE 802.1D), Rapid Spanning Tree Protocol (RSTP) (IEEE 802.1w) for faster recovery, and Multiple Spanning Tree Protocol (MSTP) (IEEE 802.1s) for VLAN-specific STP instances.
- Link Aggregation (Trunking): Bundles multiple physical interfaces into a single logical port to increase bandwidth and reduce congestion. It supports up to 8 aggregate ports and 6 trunk groups, complying with IEEE 802.3ad, and includes Link Aggregation Control Protocol (LACP).
- Secure Shell (SSH): Provides a secure channel for remote management via public-key cryptography, enhancing system and network management security.
- Remote Monitoring (RMON): Monitors communication status of devices, providing network status information for overall segments, individual hosts, and traffic between hosts. It supports Statistics and History MIB groups.
- Syslog: Generates and forwards event notifications to a syslog server, aiding in troubleshooting network problems.
- MAC Filtering: Allows or blocks packets based on specified MAC addresses, enhancing security and performance.
- Address Resolution Protocol (ARP): Manages IP/MAC address mappings, supporting static ARP entries, ARP inspection for security, and proxy ARP for subnet communication.
- IPv6 Neighbor Discovery (ND): Combines ARP and ICMP router discovery for IPv6, enabling detection of reachable neighbors and managing link-layer addresses.
- TCP Flag Control: Configures RST and SYN flags to prevent connection overcrowding and enhance security.
- Port Security: Restricts input to an interface by limiting and identifying MAC addresses of allowed PCs, ensuring full bandwidth for authorized devices.
- Storm Control: Limits broadcast, multicast, and destination lookup failure (DLF) packets to prevent network instability caused by excessive traffic.
- Jumbo Frame Capacity: Supports larger packet sizes (up to 12288 bytes) than standard Ethernet frames (1518 bytes).
- PPPoE Vendor Tag Filtering: Provides filtering capabilities for PPP over Ethernet (PPPoE) packets based on vendor tags.
Important Technical Specifications:
- Interfaces: 8 GPON interfaces, 4 optical 10GbE uplink ports.
- VLANs: Supports up to 4096 VLANs.
- MAC Addresses: Maximum 4096 MAC addresses can be registered for filtering.
- Power Supply: Dual Power Supply Units (PSU) for redundancy.
- CPU Packet Limit: Configurable from 500 to 20000 packets per second.
- Memory Threshold: Configurable for auto-reset based on memory usage.
- Fan Operation: Controlled by system temperature thresholds.
- SNMP Versions: Supports SNMPv1, v2, v3.
- GPON Distance: Maximal distance between OLT and ONU (ONT) up to 60 km.
- Upstream Bandwidth: Total upstream bandwidth up to 1120000 kbps (default).
- Encryption: Downstream encryption with periodic key exchange.
- Bit Error Ratio (BER): Monitors uplink and downlink data for error bits and rates.
- T-CONTs and GEM Ports: Configurable thresholds for T-CONTs and GEM port count.
Usage Features:
- Command Line Interface (CLI): User-friendly interface for system configuration and management, accessible via remote access or console interface (RS232).
- Configuration Modes: Multiple modes for specific configurations, including Privileged EXEC View/Enable, Global Configuration, Rule Configuration, DHCP Pool Configuration, DHCP Option 82 Configuration, RMON Configuration, VRRP Configuration, Bridge Configuration, Interface Configuration, Router Configuration, Route-Map Configuration, and GPON Configuration.
- Help System: Provides available commands and variable information through a question mark
<?> input.
- Command History: Allows recalling previously entered commands using arrow keys.
- Abbreviation Support: Supports abbreviated forms of commands for faster input.
- System Login: Secure login with configurable passwords and user accounts with different security levels (0-15).
- Auto Log-out: Configurable inactive session timeout for security.
- System Account Management: Creation and deletion of user accounts with specified security levels.
- Telnet Access: Remote host connection for management.
- SSH Client/Server: Secure remote access and authentication using public-key cryptography.
- 802.1x Authentication: Port-based and MAC-based authentication with RADIUS and TACACS+ server support.
- System Rebooting: Manual and auto-reset options based on CPU load, memory usage, or network connection status (PING test).
- Port Mirroring: Monitors traffic on designated ports by copying and sending it to a monitor port.
- Host Name and Time Zone Configuration: Customization of system identification and time settings.
- Network Time Protocol (NTP) / Simple Network Time Protocol (SNTP): Synchronizes system time with external time servers, supporting authentication.
- Terminal Configuration: Configurable display lines on the console terminal.
- Configuration Management: Displays and saves system configurations to flash memory, with auto-saving feature.
- System Management: Displays system running time, information, memory status, and debugging information.
- CPU Packet Management: Limits the number of packets handled by the CPU and provides packet filtering.
- Packet Dump: Captures and saves packets for troubleshooting.
- Multicast Group Membership: Manages multicast group interests and forwarding.
- PIM-SM: Supports Protocol Independent Multicast - Sparse Mode for efficient multicast routing.
- MLD (Multicast Listener Discovery): Manages multicast group membership for IPv6.
Maintenance Features:
- System Software Upgrade: Supports dual OS images and allows manual or auto-upgrade of firmware via FTP/TFTP.
- ONU Firmware Upgrade: Remote upgrade of ONU (ONT) firmware, with options for manual or auto-upgrade, and configurable time-out settings.
- OLT Anti-Spoofing: Prevents malicious spoofing attacks by blocking sub-level MAC addresses from faulty ONUs.
- ONU Deactivation Monitoring: Generates alarms based on ONU deactivation and monitors active ONU percentages.
- OMCC Monitoring: Recovers from errors on the ONT Management and Control Channel.
- Pseudowire Maintenance Profile: Configures exception handling for pseudowire services and monitors performance history.
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