Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

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Summary of Features
ExtremeWare XOS 11.3 Concepts Guide
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ExtremeWare XOS supports virtual routers. This capability allows a single physical switch to be split
into multiple virtual routers. This feature separates the traffic forwarded by a virtual router from the
traffic on a different virtual router. Each virtual router maintains a separate logical forwarding table,
which allows the virtual routers to have overlapping address spaces. Because each virtual router
maintains its own separate routing information, packets arriving at a port on one virtual router can
never be switched to the ports on another. In this release of ExtremeWare XOS, the management port
belongs to one virtual router and all other ports belong to other virtual routers. With software release
11.2, ports can belong to multiple virtual routers.
With multiple virtual routers contained on a single physical switch, some commands in
ExtremeWare XOS now require you to specify to which virtual router the command applies. For
example, when you use the
ping
command, you must specify from which virtual router the ping
packets are generated. Many commands that deal with switch management use the management virtual
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 22 .
For more information on virtual routers, see Chapter 10 .
Software Modules
With software version 11.0, ExtremeWare XOS introduces the ability for the user to download a discrete
software module (or feature pack) 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, and the Converged Network Analysis (CNA) test
plug is available with 11.2. (Refer to
Appendix C for information on the CNA test plug software, which
you use only if you are running an Avaya
®
voice over IP (VoIP) solution.)
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.
With ExtremeWare XOS version 11.2, Secure Socket Layer (SSL) software is bundled with the SSH
software module.
For more information on SSH and SSL, see Chapter 16 .
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