Understanding Virtual Routing Instances On Ex Series Switches - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Understanding Virtual Routing Instances on EX Series Switches

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Copyright © 2010, Juniper Networks, Inc.
Virtual routing instances allow administrators to divide a Juniper Networks EX Series
Ethernet Switch into multiple independent virtual routers, each with its own routing table.
Splitting a device into many virtual routing instances isolates traffic traveling across the
network without requiring multiple devices to segment the network.
You can use virtual routing instances to isolate customer traffic on your network and to
bind customer-specific instances to customer-owned interfaces.
Virtual routing and forwarding (VRF) is often used in conjunction with Layer 3
subinterfaces, allowing traffic on a single physical interface to be differentiated and
associated with multiple virtual routers. Each logical Layer 3 subinterface can belong to
only one routing instance.
EX Series switches support IPv4 and IPv6 unicast and multicast VRF traffic.
Juniper Networks EX3200 and EX4200 Series Ethernet Switches support up to 252 IPv4
virtual routing instances and up to 64 IPv6 virtual routing instances. Juniper Networks
EX8200 Series Ethernet Switches support up to 252 IPv4 and IPv6 virtual routing
instances.
Understanding Layer 3 Subinterfaces on page 1248
Example: Using Virtual Routing Instances to Route Among VLANs on EX Series Switches
on page 1577
Configuring Virtual Routing Instances (CLI Procedure) on page 1606
Chapter 63: Bridging and VLANs—Overview
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