You can configure MPLS on EX8200 and EX4500 switches
to increase transport efficiency in your network. MPLS services can
be used to connect various sites to a backbone network and to ensure
better performance for low-latency applications such as VoIP and other
business-critical functions.
To implement MPLS on EX Series switches, you must configure
at least one provider switch as a transit switch for the MPLS packets.
The configuration of all the provider switches remains the same regardless
of whether the provider edge (PE) switches are using circuit cross-connect
(CCC) or using MPLS over IP for the customer edge interfaces. Likewise,
you do not need to change the configuration of the provider switches
if you implement an MPLS-based Layer 2 VPN, Layer 3 VPN, or a Layer
2 circuit configuration.
MPLS requires the configuration of a routing protocol (OSPF
or IS-IS) on the core interfaces and the loopback interface of all
the switches. This procedure includes the configuration of OSPF on
the provider switch. For information on configuring IS-IS as the routing
protocol, see Junos OS Routing Protocols Configuration Guide.
To configure the provider switch, complete the following tasks:
- Enable the routing protocol (OSPF or IS-IS) on the loopback
interface and on the core interfaces:
Note: You can use the switch address as an alternative to the
loopback interface.
[edit protocols]
user@switch# set ospf area 0.0.0.0 interface lo0.0
user@switch# set ospf area 0.0.0.0 interface ge-0/0/5.0
user@switch# set ospf area 0.0.0.0 interface ge-0/0/6.0
user@switch# set ospf area 0.0.0.0 interface ae0
- Enable traffic engineering for the routing protocol (traffic
engineering must be explicitly enabled for OSPF):
[edit protocols]
user@switch# set ospf traffic-engineering
- Enable MPLS within the protocols stanza and apply
it to the core interfaces:
[edit protocols]
user@switch# set mpls interface ge-0/0/5.0
user@switch# set mpls interface ge-0/0/6.0
user@switch# set mpls interface ae0
- Configure RSVP on the loopback interface and the core
interfaces:
[edit protocols]
user@switch# set rsvp interface lo0.0
user@switch# set rsvp interface ge-0/0/5.0
user@switch# set rsvp interface ge-0/0/6.0
user@switch# set rsvp interface ae0
- Configure an IP address for the loopback interface and
for the core interfaces:
[edit]
user@switch# set interfaces lo0 unit 0 family inet address 127.1.1.1/32
user@switch# set interfaces ge-0/0/5 unit 0 family inet address 10.1.5.1/24
user@switch# set interfaces ge-0/0/6 unit 0 family inet address 10.1.6.1/24
user@switch# set interfaces ae0 unit 0 family inet address 10.1.9.2/24
- Configure family mpls on the logical units of
the core interfaces:
[edit]
user@switch# set interfaces ge-0/0/5 unit 0 family mpls
user@switch# set interfaces ge-0/0/6 unit 0 family mpls
user@switch# set interfaces ae0 unit 0 family mpls
Note: You can enable family mpls on either individual
interfaces or aggregated Ethernet interfaces. You cannot enable it
on tagged VLAN interfaces.
