LN1000 Rear Transition Module Features

LN1000 Rear Transition Module Backplane Connector

The connector on the LN1000 rear transition module provides the ability to configure the router. It also provides:

Figure 6: LN1000 Rear Transition Module — Back View

LN1000 Rear Transition Module — Back View

LN1000 Rear Transition Module Console Ports

The shMM console port is the console port for the optional shMM module on the RTM. The settings are baud rate of 19200 8N1, no flow control. You can use this port to send and receive debug console commands to and from the shelf manager.

The IPMC console port is the console port for the IPMC controller on the LN1000 board. The settings are baud rate of 115200 8N1, no flow control. This is a debug output only port.

The RS-232 console port, labeled NPU, accepts an RJ-45 connector and is located on the front panel of the LN1000 rear transition module. The settings are baud rate of 9600 8N1, no flow control. You can use this console port to monitor system startup and for system repair. This console port is also available from the front panel of the LN1000 router.

Figure 7: LN1000 Rear Transition Module — Front Panel

LN1000 Rear Transition Module — Front Panel

Table 6: Pinouts for the RJ-45 (NPU), shMM, and IPMC Console Port Connectors

Pin

Setting

Description

1

NC

No connect.

2

RXD

Transmit data into the LN1000 router.

3

TXD

Transmit data out from the LN1000 router.

4

NC

No connect.

5

GND

Ground.

6

NC

No connect.

7

NC

No connect.

8

NC

No connect.

IPMI Shelf Manager

The optional IPMI shelf management module provides intelligent management functions for the rear transition module, including sensing the presence of the LN1000 router, and configuring and booting the router when it is installed in the LN1000 rear transition module.

Note: The IPMI shelf manager is not installed in the LN1000 rear transition module by default.

The IPMI shelf manager:

LN1000 Rear Transition Module Ethernet Ports

The LN1000 rear transition module includes eight gigabit Ethernet ports to provide Ethernet connectivity. These eight ports connect directly to the chassis midplane, enabling you to connect directly to the Ethernet ports on the LN1000 router. Ethernet Port 0 is typically used as the management port. Ports 1 through 7 are typically used for data transfer.

Note: There is no dedicated management port on the LN1000 router.

LN1000 Rear Transition Module Switch Settings

The switch banks on the rear transition module are set as follows:

Switch BankDescription

S1

No user control. All switches are off for normal operation.

S2

  • Switch 1, WD_INH_L. This switch has no effect.
  • Switch 2: NVMRO. This signal controls the ability to write to the system non-volatile memory. This switch is off to allow read-only access to system non-volatile memory. Set this switch to on to enable writing to non-volatile memory.

    If you set the NVRMO switch to off, note the following precautions:

    • Do not boot from USB storage device; router performance will be degraded.
    • Do not use J-Web; unpredictable results may occur.
    • Do not use the CLI command request system software add; unpredictable results may occur.
  • Switches 3 and 4 must be off for normal operation.