Configure IS-IS
Learn how to configure the IS-IS protocol on your MX204, MX301, MX304, MX10004, or MX10008 router.
To configure IS-IS, you must enable IS-IS on the interfaces and configure a NET address on
one of the device interfaces (preferably, the lo0 interface) by setting family iso
address net-address on the interface.
To enable IS-IS routing, you must:
-
Configure a NET address (also known as the system ID or the NSAP address) on one of the device interfaces (preferably, the lo0 interface) by including the
family iso address net-addressstatement on the interface. -
Configure the ISO family on all interfaces that are supporting the IS-IS protocol by including the
family isostatement on the interface. -
Advertise the device interfaces into IS-IS by inlcuding the
interface interface-namestatement in the protocol configuration. -
(On security devices only) Enable the forwarding of IS-IS traffic by including the
family mode packet-basedstatement in the security forwarding options configuration.
To configure IS-IS on a Juniper MX router (Junos OS), perform the following steps:
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Define the NET (Network Entity Title) to uniquely identify the router:
set interfaces lo0 unit 0 family iso address 49.0001.0000.0000.0001.00
-
Enable the ISO protocol family on all interfaces participating in IS-IS:
set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/1 unit 0 family iso
-
Activate IS-IS on the interfaces. By default, it runs as Level 1-2:
set protocols isis interface lo0.0 set protocols isis interface ge-0/0/0.0 set protocols isis interface ge-0/0/1.0
We recommend that you configure IS-IS to enable wide-metric only:
[edit routing-options] set protocols isis level <1|2> wide-metrics-only set protocols isis interface et-x/x/x point-to-point
Check adjacency and interface status:
show isis adjacency show isis interface
For more information on configuring the IS-IS Routing protocol in Junos OS, see the IS-IS User Guide.