Virtual Systems; Chapter 11 Virtual Systems; Vsys Dhcp Enhancement Overview - Juniper NETWORK AND SECURITY MANAGER 2010.4 - CONFIGURING SCREENOS DEVICES GUIDE REV 01 Manual
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CHAPTER 11
Virtual Systems
Vsys DHCP Enhancement Overview
Copyright © 2010, Juniper Networks, Inc.
You can logically partition a single Juniper Networks security system into multiple virtual
systems to provide multi-tenant services. Each virtual system (vsys) is a unique security
domain and can have its own administrators (called virtual system administrators or
vsys admins) who can individualize their security domain by setting their own address
books, user lists, custom services, VPNs, and policies. Only a root-level administrator,
however, can set firewall security options, create virtual system administrators, and
define interfaces and subinterfaces.
NOTE: Refer to the Juniper Networks marketing literature to see which
platforms support this feature.
Juniper Networks virtual systems support two kinds of traffic classifications: VLAN-based
and IP-based, both of which can function exclusively or concurrently. For more information
on how to create and view Vsys profiles and other resource information, see the Concepts
& Examples ScreenOS Reference Guide.
This chapter contains the following topics:
Vsys DHCP Enhancement Overview on page 355
Vsys Limitations Overview on page 356
Example: Configuring Vsys Resource Limits (NSM Procedure) on page 357
Vsys Session Limit Overview on page 358
Example: Configuring Vsys Session Limit (NSM Procedure) on page 358
Vsys CPU Limit Overview on page 359
Example: Configuring CPU Limit (NSM Procedure) on page 360
Dynamic Host Configuration Protocol (DHCP) was designed to reduce the demands on
network administrators by automatically assigning the TCP/IP settings for the hosts on
a network. Instead of requiring administrators to assign, configure, track, and change
(when necessary) all the TCP/IP settings for every machine on a network, DHCP does it
all automatically. Furthermore, DHCP ensures that duplicate addresses are not used,
355
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