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Console Server General Topics
Why do I need SSH?
|How do I access my devices with SSH?|
An SSH client needs to run on the administrators PC. They are similar to standard terminal emulators but support the SSH protocol. There are free SSH clients available for download on the web such as PuTTy or TeraTerm.
|A 3.||Will the 10MB units still be available?|
Perle is in the process of discontinuing the 10MB units. The 10/100 units are a direct replacement and are sold at the same price.
|A 4.||Has the physical layout of the CS9000 changed?|
No. The 10BaseT port has now become the 10/100 port and so there is no physical layout change to the unit.
|A 5.||I already have some CS9000’s which I wish to get SSH on?|
The SSH software is part of a firmware release and is available on the web for free download. Existing CS9000's can be flash upgraded to this version using normal methods. . See Perle downloads
|A 6.||What is the difference between SSH v1 and SSH v2?|
Overall, SSH v2 is more secure. SSH v1 and SSH v2 are two entirely different protocols that encrypt at different parts of the packets. SSH v1 uses server and host keys to authenticate systems where SSH v2 uses host keys. SSH v2 is a complete rewrite of the protocol, and does not use the same networking implementation as SSH v1.
|A 7.||Do I need SSL?|
SSL is the protocol for encrypting data when using web browsers.
The CS9000 also supports Radius security, what benefits does this offer?
Does the CS9000 have port buffers?
|A 10.||Can I send a break signal to a Sun Server via the CS9000|
Yes. The CS9000 does not send break signals when power cycled thus preventing unwanted shutdowns of Sun servers. However, the CS9000 can be configured to allow a break signal to be passed through when deliberately sent by the administrator. This allows the administrator to take a Sun server to the Open Boot Prompt only when desired.
Break signals can be sent via Telnet and SSH sessions (see manual for details)
|A 11.||What advantages can be gained by using a CS9000 with a Sun Netra?|
A Sun Netra t1 has no video/keyboard/mouse ports and so can only be accessed via the network or the serial console ports. When powering on a Netra for the first time you must have a connection to the Serial A/LOM port. Through this port you will power on the system and then be asked to input information to decide the setup of the system. All of these can be done through a port on the CS9000 and avoid the need to be local to the system as the CS9000 is capable of in and out of band access.
Via this port it is possible to power on and power off the system at any time using the LOM (Lights-Out Management) facility. Also through the LOM you can monitor the status of the power supply, fans, fault LED and alarms even when the system is powered down. There is also the ability to turn on fault LED’s in order to help identify a unit in a rack full of Netra servers. Once the system has booted up it is possible to access the Solaris O/S for full system management.
Without a CS9000 it will be necessary to have a terminal connected to every server (think of the space needed and the power consumption). The only other option is to have nothing connected to the port and only connect when there is an emergency, however this will demand that someone is local to the system and have full access to the racks at all times.
|A 12.||Does the CS9000 come with more than 24 ports?|
Many users are reluctant to put in high port density console servers. If all devices in a rack were connected to one console server then access would be lost to all devices in the unfortunate scenario where the console server failed. By installing 2 smaller density units there is a high level of redundancy in the event of a failure. In addition, most racks are usually populated with 16 devices or less. Many servers take up 3 U’s and many storage devices take up 14 U’s. In these cases a smaller density port server is desired. Most people use cabling options to connect more that one rack to the Perle 16 or 24 port versions of the CS9000.
Can the CS9000 be used to power manage systems (i.e. power cycle systems)
Also some systems such as the Sun Netra range allow power management through their serial console port which is connected via a CS9000.