Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

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ExtremeWare XOS Overview
ExtremeWare XOS 11.3 Concepts Guide
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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 19 .
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 BlackDiamond 8800 family of switches and the Summit X450
switch do not support bi-directional rate-shaping.
For more information on Quality of Service, see Chapter 15 .
sFlow
sFlow
®
is a technology for monitoring traffic in data networks containing switches and routers. The
technology relies on statistical sampling of packets from high-speed networks, plus periodic gathering
of the statistics. A UDP datagram format is defined to send the information to an external entity for
analysis. sFlow consists of a Management Information Base (MIB) and a specification of the packet
format for forwarding information to a remote agent. Details of sFlow specifications can be found in
RFC 3176, and specifications and more information can be found at the following website:
http://www.sflow.org
The ExtremeWare XOS implementation is based on sFlow version 5, an improvement from that
specified in RFC3176.
For information on sFlow, see Chapter 8 .
ESRP
With software version 11.0, you can use the Extreme Standby Routing Protocol (ESRP). ESRP is an
Extreme Networks proprietary protocol that allows multiple switches to provide redundant routing
services to users. ESRP also provides Layer 2 redundancy; the Layer 3 and Layer 2 redundancy can be
used separately or together.
Using ESRP allows you to simplify your network, and it works very well in meshed networks where
Layer 2 loop protection and Layer 3 redundancy are both required.
For more information on ESRP, see Chapter 21 .