Extreme Networks ExtremeWare XOS 11.1, Руководство пользователя

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Summary of Features
ExtremeWare XOS 11.1 Concepts Guide
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router by default. See the ExtremeWare XOS Command Reference Guide for information on the defaults for
individual commands.
NOTE
The term “virtual router” is also used with VRRP. VRRP uses the term to refer to a single virtual router that spans
more than one physical router and allows multiple switches to provide redundant routing services to users. For more
information about VRRP, see
Chapter 18 .
For more information on virtual routers, see Chapter 9
Software Modules
With software version 11.0, ExtremeWare XOS introduces the ability for the user to download a discrete
software module that contains complete functionality for a specified feature. The user no longer must
download the entire image in order to obtain these specific modules. Secure Shell (SSH) is the software
module available with version 11.0.
SSH
To access the switch using the Secure Shell (SSH), you must download, install, and enable the SSH
software module. Once installed, you use the SSH to access the switch. You obtain the SSH software
module through your Extreme Networks support account on the website, once you provide the
required information.
For more information on SSH, see Chapter 13 .
EAPS
With software version 11.0, the switch supports Ethernet Automatic Protection Switching (EAPS). This
Extreme Networks proprietary protocol provides fast protection switching to Layer 2 devices connected
in a ring topology, such as large campuses. EAPS provides protection to switching similar to STP, but
the convergence is much faster using EAPS. This fast convergence occurs regardless of the number of
switches in the ring.
ExtremeWare XOS software version 11.1 introduces support for multiple EAPS rings. To use this feature,
you must have Core license. (Refer to
“Software Licensing” for more information on the Core license.)
For more information on EAPS, see Chapter 15 .
Quality of Service
ExtremeWare XOS has Policy-Based Quality of Service (QoS) features that enable you to specify service
levels for different traffic groups. By default, all traffic is assigned the
low QoS policy profile. If needed,
you can customize other QoS policies and apply these policies to different traffic types so that the traffic
types have different guaranteed priority.
With software version 11.0 on the BlackDiamond 10K switch, you can set parameters for ingress traffic,
called bi-directional rate shaping; the Aspen 8810 switch does not support bi-directional rate-shaping.
For more information on Quality of Service, see Chapter 12 .