Before You Begin; General Preparation; Ping Mpls Preparation; Mpls Enabled - Juniper J-Series Administration Manual

Before You Begin

This section includes the following topics:

General Preparation

To use the J-Web interface and CLI operational tools, you must have the appropriate
access privileges. For more information about configuring access privilege levels,
see "Adding New Users" on page 11 and the JUNOS System Basics Configuration
Guide.

Ping MPLS Preparation

Before using the ping MPLS feature, make sure that the receiving interface on the
VPN or LSP remote endpoint has MPLS enabled, and that the loopback interface on
the outbound node is configured as
must be a valid address on the Services Router.

MPLS Enabled

To process ping MPLS requests, the remote endpoint of the VPN or LSP must be
configured appropriately. You must enable MPLS on the receiving interface of the
outbound node for the VPN or LSP. If MPLS is not enabled, the remote endpoint
drops the incoming request packets and returns an "ICMP host unreachable" message
to the Services Router. To enable MPLS on an interface, see the J-series Services
Router Advanced WAN Access Configuration Guide.

Loopback Address

The loopback address (
If this interface address is not configured correctly, the outbound node does not have
this forwarding entry. It drops the incoming request packets and returns a "host
unreachable" message to the Services Router. If the outbound node is a Services
Router, see the J-series Services Router Advanced WAN Access Configuration Guide to
configure the loopback address.

Source Address for Probes

The source IP address you specify for a set of probes must be an address configured
on one of the Services Router interfaces. If it is not a valid Services Router address,
the ping request fails with the error message "Can't assign requested address."
General Preparation on page 215
Ping MPLS Preparation on page 215
) on the outbound node must be configured as
lo0
Chapter 12: Using Services Router Diagnostic Tools
127.0.0.1 . The source address for MPLS probes

Before You Begin

.
127.0.0.1
215