Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1705

Configuring Routed VLAN Interfaces (CLI Procedure)
Copyright © 2010, Juniper Networks, Inc.
Routed VLAN interfaces (RVIs) enable the EX Series switch to recognize which packets
are being sent to local addresses so that they are bridged (switched) whenever possible
and are routed only when needed. Whenever packets can be switched instead of routed,
several layers of processing are eliminated. Switching also reduces the number of address
lookups.
An interface named vlan functions as the logical router, on which you can configure a
Layer 3 logical interface for each VLAN. For redundancy, an RVI can be combined with
implementations of the Virtual Router Redundancy Protocol (VRRP) in both bridging
and VPLS environments.
Jumbo frames of up to 9216 bytes are supported on an RVI. To route jumbo data packets
on the RVI, you must configure the jumbo MTU size on the member physical interfaces
of the RVI and not on the RVI itself (the
packets—for example, to ping the RVI with a packet size of 6000 bytes or more—you
must explicitly configure the jumbo MTU size on the interface named
CAUTION: Setting or deleting the jumbo MTU size on the RVI (the
interface) while the switch is transmitting packets might result in dropped
packets.
To configure the routed VLAN interface (RVI):
Create a Layer 2 VLAN by assigning it a name (for example,
1.
(for example, 111 ).
[edit]
user@switch# set vlans support vlan-id 111
Assign an interface (for example,
2.
VLAN as a trunk member on the logical interface, thereby making the interface part
of the VLAN's broadcast domain.
[edit]
user@switch# set interfaces ge-0/0/18 unit 0 family ethernet-switching vlan members
support
Create a logical Layer 3 RVI (
3.
[edit]
user@switch# set interfaces vlan unit 111 family inet address 111.111.111.1/24
Link the Layer 2 VLAN to the logical Layer 3 interface.
4.
[edit]
user@switch# set vlans support l3-interface vlan.111
Chapter 65: Configuring Bridging and VLANs
vlan interface). However, for jumbo control
ge-0/0/18 ) to the VLAN (
) on a subnet for the VLAN's broadcast domain.
vlan.111
(the RVI).
vlan
vlan
) and a VLAN ID
support
support ) by naming the
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