About Software Duplication; About Ssh - Avaya S8700 Series Installing And Configuring

About software duplication

Software duplication eliminates the need for the DAL2 duplication cards in duplicated S8720
Media Servers. Software duplication is supported only on the S8720 and is the default
configuration. For software duplication, all duplication messages are sent over the server
duplication TCP/IP link.
!
CAUTION:
An S8720 communications system configured with software duplication has lower
CAUTION:
call performance than the same system configured with hardware duplication.
Encrypting duplication messages further degrades performance. For software
duplication, Avaya recommends that you use a dedicated duplication link with a
bandwidth of at least 1 Gigabit per second.
The S8720 Media Server is shipped without the optional DAL2 hardware duplication card. If
purchased, the DAL2 hardware duplication cards and the dual fiber cable that links the DAL2
cards are installed in the S8720 media servers at the customer site.
The duplication type, that is, hardware or software, is administered as a Configure Server step
on the Server Duplication Web page in the Maintenance Web Interface.

About SSH

Secure Shell (SSH) is both a computer program and an associated network protocol that you
use to log in to and run commands on a networked computer. SSH provides secure encrypted
communications between two untrusted hosts over an insecure network. Avaya strongly
recommends that you use SSH instead of Telnet for most interactive connections to the Avaya
media servers and other devices on a customer network.
To use SSH, a third-party SSH client must be installed on your computer. PuTTY is one such
client. You can download PuTTY from http://www.putty.nl/download.html.
You can use SSH to access the following devices:
The S8300, S8400, S8500, and S8700-series Media Servers on Release 3.1 or later of
●
Communication Manager
Note:
With Release 4.0 or later of Communication Manager, Telnet is disabled, so you
Note:
must use SSH to access the media servers after Communication Manager
software Release 4.0 or later is installed.
A Server Availability Management Processor (SAMP), which is used with the S8500 Media
●
Server
Installing and Configuring the Avaya S8700-Series Media Server
About software duplication
February 2007
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