Disabling IPv4 Routing for IS-IS

You can disable IP version 4 (IPv4) routing for IS-IS. Disabling IPv4 routing results in the following:

• Routing device does not advertise the NLPID for IPv4 in Junos OS 0th link-state PDU fragment.
• Routing device does not advertise any IPv4 prefixes in Junos OS link-state PDUs.
• Routing device does not advertise the NLPID for IPv4 in Junos OS hello packets.
• Routing device does not advertise any IPv4 addresses in Junos OS hello packets.
• Routing device does not calculate any IPv4 routes.

To disable IPv4 routing on the routing device, include the no-ipv4-routing statement:

For a list of hierarchy levels at which you can include this statement, see the statement summary section for this statement.

To reenable IS-IS, remove the no-ipv4-routing statement from the configuration: