Understanding Ipv6 Layer 3 Vpns; Layer 3 Vpns For Ipv4 And Ipv6 Overview - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

Understanding IPv6 Layer 3 VPNs

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Layer 3 VPNs for IPv4 and IPv6 Overview

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NOTE: Setting a path or prefix limit might result in unpredictable dynamic
routing protocol behavior.
You can also configure the following options for both the
statements:
maximum-prefixes
—Specify the interval at which log messages are sent. This option generates
log-interval
warning messages only (an advisory limit).
Specify the option to configure the minimum time interval between log
log-interval
messages.
—Generate warning messages only. No limit is placed on the number of paths
log-only
or prefixes stored in the routing tables.
threshold —Generate warning messages after the specified percentage of the maximum
paths or prefixes has been reached.
The interfaces between the PE and CE routers of a Layer 3 VPN can be configured to
carry IP version 6 (IPv6) traffic. IP allows numerous nodes on different networks to
interoperate seamlessly. IPv4 is currently used in intranets and private networks, as well
as the Internet. IPv6 is the successor to IPv4, and is based for the most part on IPv4.
In the Juniper Networks implementation of IPv6, the service provider implements an
MPLS-enabled IPv4 backbone to provide VPN service for IPv6 customers. The PE routers
have both IPv4 and IPv6 capabilities. They maintain IPv6 VPN routing and forwarding
(VRF) tables for their IPv6 sites and encapsulate IPv6 traffic in MPLS frames that are
then sent into the MPLS core network.
IPv6 for Layer 3 VPNs is supported for BGP and for static routes.
IPv6 over Layer 3 VPNs is described in RFC 4659, BGP-MPLS IP Virtual Private Network
(VPN) Extension for IPv6 VPN.
Routing Policies, Firewall Filters, and Traffic Policers Feature Guide
Junos OS Routing Protocols Library
A Layer 3 virtual private network (VPN) routing instance is a collection of routing tables,
interfaces, and routing protocol parameters. The interfaces belong to the routing tables,
and the routing protocol parameters control the information in the routing tables. In the
case of MPLS VPNs, each VPN has a VPN routing and forwarding (VRF) routing instance.
A VRF routing instance consists of one or more routing tables, a derived forwarding table,
the interfaces that use the forwarding table, and the policies and routing protocols that
and
maximum-paths
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