IBM Support

Secure Shell (SSH) client configuration for Advanced Management Module (AMM) Serial over LAN and secure SMASH - IBM BladeCenter

Troubleshooting


Problem

Advanced Management Module (AMM) Secure SMASH responds "Input Redirection Not Supported" or AMM Secure Shell (SSH) CLI Serial Over LAN (SOL) output contains extra blank lines and the ESC-'(' sequence is not recognized until the Enter key is pressed.

Resolving The Problem

Source

RETAIN tip: H191926

Symptom
  1. Advanced Management Module (AMM) Secure SMASH responds "Input Redirection Not Supported" as shown in the following example:
    $ ssh -p 50022 USERID@192.168.70.1 show
    === SM CLP v1.0.0 SM ME Addressing v1.0.0 IICM
    Implementation v1.6.1.d1.3.8.p2b
    ===

    Input Redirection Not Supported.

  2. AMM Secure Shell (SSH) CLI Serial Over LAN (SOL) output contains extra blank lines and the ESC-'(' sequence is not recognized until the Enter key is pressed.
Affected configurations

The system may be any of the following IBM servers:

  • BladeCenter Chassis, type 7967, any model
  • BladeCenter Chassis, type 8677, any model
  • BladeCenter H, type 7989, any model
  • BladeCenter H, type 8852, any model
  • BladeCenter HT, type 8740, any model
  • BladeCenter HT, type 8750, any model

The system is configured with one or more of the following IBM Options:

  • BladeCenter Advanced Management Module, Option part number 25R5778, replacement part number (FRU) 25R5777

This tip is not software specific.

Workaround

Configure the SSH client software to allocate a pseudo terminal (PTY) for the connection.

If using the OpenSSH client software specify the '-t' command line parameter to allocate a PTY for the SSH connection to the AMM.

EXAMPLE 1:

Secure SMASH example using OpenSSH Client software:

$ ssh -t -p 50022 USERID@192.168.70.1 show
Success
UFiT: admin1
UFiP: /
Properties:
ElementName: MAPProvider Admin Domain
Description: Administrative domain for SMASH CLP
Verbs:
Standard: help show
UFiT: hdwr1
UFiT: map1
UFiT: modular1
Connection to 192.168.70.1 closed.
EXAMPLE 2:

SSH CLI example using OpenSSH client software to start (SOL) to blade 8:

$ ssh -t USERID@192.168.70.1 console -T blade(8)

Additional information

The OpenSSH client software controls whether a PTY is allocated for a session. The default behavior of this software is to allocate a PTY for interactive sessions and not allocate a PTY for non-interactive sessions. A non-interactive session is a session where a CLI command is specified on the SSH client command line.

The default behavior is acceptable to the AMM except for the following cases:

  1. Secure SMASH non -interactive commands.
  2. SSH CLI non -interactive commands that start (SOL) sessions.

If in doubt, specify '-t' on the OpenSSH client command line.

Other SSH client software packages contain similar configurable options. Consult the documentation for the SSH client to learn how to specify that a PTY is allocated.

Document Location

Worldwide

Operating System

BladeCenter:Operating system independent / None

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Document Information

Modified date:
29 January 2019

UID

ibm1MIGR-5072925

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