Emerson PACSystems ™ Ethernet Switch SLM082

Connection rule: The TX port of switch A needs to be connected to the RX port of switch B to ensure the correct transmission of optical signals.

（3） Console cable

Cable specifications: The package contains a DB-9 (female) to RJ45 cable, which is used to connect the computer COM port to the switch Console port.

Pin correspondence: Pin 2 (RD, receive data) of the computer end (DB-9 male head) corresponds to Pin 2 (TD, send data) of the DB-9 female head, Pin 3 (TD, send data) corresponds to Pin 3 (RD, receive data) of the female head, and Pin 5 (GD, ground) corresponds to Pin 5 (GD, ground) of the female head.

Web Management Configuration 

Web management is based on the built-in HTML web pages (Flash storage) of the switch, supporting IE5.0 and above browsers (with Java Applets network port permissions enabled), and compatible with both HTTP and HTTPS modes.

（1） Login preparation and default parameters

Default parameters: IP address 192.168.0.100, subnet mask 255.255.255.0, default gateway 192.168.0.254, username/password "admin".

Login steps: Open the browser and enter "http:///device IP" or "https://device IP". Enter the username and password to enter the management interface.

（2） Core configuration function

1. Basic Settings (5.1.5)

Switch information: System name (maximum 64 bytes), physical location, contacts, firmware version (default 1.03), kernel version (default v2.49), device MAC address, etc. can be modified.

Administrator password: Old username/password verification is required, and the new password must be at least 8 characters long, containing 1 uppercase letter, 1 number, and 1 special character (such as @ # $).

IP configuration: You can manually set IP/subnet mask/gateway/DNS, or enable DHCP clients to automatically obtain IP (if there is a DHCP server in the network).

SNTP time synchronization: After enabling the SNTP client, you can set the time zone (such as GMT Greenwich Mean Time), SNTP server IP, and support daylight saving time configuration (setting start and end times and offsets).

2. Backup and Upgrade (5.1.6)

Configure backup/restore: Back up the current configuration file (such as data.bin) through the TFTP server, or restore the configuration from the TFTP server.

Firmware upgrade: Prepare a TFTP server and store firmware files (such as image. bin). Enter the server IP and file name in the interface, click "Upgrade" to complete the upgrade (power off is prohibited during the upgrade, and the physical loop must be removed first).

3. DHCP Server (5.1.7)

Function switch: When enabled, the switch acts as a DHCP server and can assign dynamic IP addresses to LAN devices.

Parameter configuration: Set IP allocation range (such as 192.168.0.2-192.168.0.200), subnet mask, gateway DNS， And the IP lease duration (default 168 hours).

Port IP binding: A fixed IP can be assigned to a specified port to ensure that the device obtains the same IP every time it connects.

4. Port settings (5.1.8)

Port control: Set port enable/disable, rate/duplex mode (such as auto negotiation, 100 full), flow control mode (symmetric/asymmetric), and port security (only allow MAC addresses in the security list to forward data when enabled).

Rate limit: It can limit the inbound/outbound traffic of ports and support classification restrictions based on "broadcast frames", "broadcast+multicast frames", and "broadcast+multicast+flood unicast frames".

Trunk port aggregation: supports static aggregation or 802.3ad LACP dynamic aggregation, merging multiple physical ports into logical links to improve bandwidth; The number of active ports in the aggregation group can be set, and the backup port will be automatically activated in case of failure.

5. Network redundancy (5.1.9)

Redundant Ring: Supports three topologies: ring, ring coupling, and dual homing. It requires specifying the "Ring Master", "First Ring Port", and "Second Ring Port"; Ring coupling is used to split a large ring into two small rings, reducing the impact of topological changes; Dual attribution is used to connect redundant rings and backbone switches through RSTP links.

RSTP configuration: After enabling RSTP, the bridge priority (0-61440, a multiple of 4096, with higher priority for smaller values), maximum aging time (6-40 seconds), Hello time (1-10 seconds), and forwarding delay (4-30 seconds) can be set, satisfying the formula "2 × (forwarding delay -1) ≥ maximum aging time ≥ 2 × (Hello time+1)".

6. VLAN configuration (5.1.10)

802.1Q Tag VLAN: Based on the IEEE 802.1Q standard, cross vendor switch VLAN partitioning is achieved by inserting VLAN tags (VID) into Ethernet frames, supporting GVRP protocol automatic synchronization of VLAN configuration; By default, all ports belong to the default VLAN with VID=1 (which cannot be deleted). Ports can be set to Access (only carrying untagged frames), Trunk (only carrying tagged frames), or Hybrid (simultaneously carrying two types of frames) modes.

Port based VLAN: Logical networks are divided by ports, and only members of the same VLAN can exchange data. Ports that are not selected are automatically assigned to another VLAN; Ignore VLAN tags when enabled.