Configuring Php; Configuration Prerequisites; Configuration Procedure - 3Com MSR 50 Series Configuration Manual

1326 C 76: MPLS B
HAPTER
Configuration
Prerequisites

Configuration Procedure

Configuring PHP

Configuration
Prerequisites
Configuration Procedure
C
ASICS ONFIGURATION
n
Currently, these types of interfaces support MPLS capability: serial interface, async
interface, Layer 3 Ethernet interface (Ethernet interface, GE interface, and XGE
interface), ATM interface, POS interface, Layer 3 virtual Ethernet interface (that is,
virtual-Ethernet interface), virtual template, Mp-group interface, MFR interface,
tunnel interface, and VLAN interface.
Before configuring MPLS basic capability, be sure to complete these tasks:
Configuring physical parameters on related interfaces
■
Configuring link layer attributes on related interfaces
■
Configuring IP addresses for related interfaces
■
Configuring static routes or an IGP protocol, ensuring that LSRs can reach each
■
other
n
MPLS basic capability can be configured on LSRs even when LSRs cannot reach
each other. However, you must configure the mpls ldp transport-address
command in this case. For details of the command, refer to
Configuration" on page
Follow these steps to configure MPLS basic capability:
To do...
Enter system view
Configure the MPLS LSR ID
Enable MPLS for the current
node and enter MPLS view
Exit to system view
Enter interface view
Enable MPLS for the interface mpls
n
An LSR ID uses the format of an IP address and is unique within an MPLS domain.
You are recommended to use the IP address of a loopback interface on an LSR as
the LSR ID.
You configure PHP on the egress and select the type of labels for the egress to
distribute based on whether the penultimate hop supports PHP.
Before configuring PHP, be sure to complete the following task:
Configuring MPLS basic capability on all LSRs
■
According to RFC 3032 "MPLS Label Stack Encoding":
A label value of 0 represents an IPv4 explicit null label and is valid only when it
■
appears at the bottom of the label stack. It indicates that the label of the
1311.
Use the command...
system-view
mpls lsr-id lsr-id
mpls
quit
interface interface-type
interface-number
"MPLS Basics
Remarks
-
Required
By default, no LSR ID is
configured.
Required
Not enabled by default
-
-
Required
Not enabled by default