Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X User Manual

Configuring VRRP
The Virtual Router Redundancy Protocol (VRRP) can prevent loss of network
connectivity to end hosts if the static default IP gateway fails. By implementing VRRP,
you can designate a number of routers as “ backup” routers in case the default “
master” router fails. You can configure VRRP on IP/Ethernet interfaces.
For information about configuring VRRP, see JUNOSe Services Availability Configuration
Guide.
Configuring Routing Policy
The router supports a number of features that allow the service provider to control
the exchange of routing information between virtual routers in the router, between
routers in the network, and between protocols within a router:
■ Access lists—Provide filters that can be applied to route maps or distribution
lists. They allow policies to be created, such as a policy to prevent forwarding of
specified routes between the BGP-4 and IS-IS routing tables.
■ Route maps—Modify the characteristics of a route (generally to set its metric or
to specify additional attributes) as it is transmitted or accepted by a router. Route
maps can use access lists to identify the set of routes to modify.
■ Distribution lists—Control the routing information that is accepted or transmitted
to peer routers. Distribution lists always use access lists to identify routes for
distribution. For example, distribution lists could use access lists to specify routes
to advertise.
■ Redistribute routes—Allow routes to be shared between routing protocols and
routing domains. For example, a subset of BGP-4 routes could be leaked into the
IS-IS routing tables.
See JUNOSe IP Services Configuration Guide, for details.
Configuring QoS
QoS is a suite of features that configure queuing and scheduling on the forwarding
path of your E Series router. QoS provides a level of predictability and control beyond
the best-effort service that is the E Series router’s default data delivery service. Packets
not assigned to a specific traffic class are carried in the best-effort traffic class.
Best-effort service provides packet transmission with no guarantee of results.
The major QoS features that the E Series router provides are:
■ Multiple traffic classes
■ Configurable scheduling
■ Configurable buffer management
Configuring VRRP ■ 25
Chapter 1: Planning Your Network

Juniper SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X Specifications

General

Brand	Juniper
Model	SYSTEM BASICS - CONFIGURATION GUIDE V 11.1.X
Category	Software
Language	English