User guide

3-34 Packet Over SONET Module Installation and User Guide

Configuring the PoS Module

When used with IPCP, the optional peer-ipaddress keyword and parameter value

provides a way to configure the IP address of the peer router. This capability is useful

with peer routers that do not advertise their IP address through the IPCP IP-Address

configuration option. If the peer router does advertise an IP address through IPCP, the

configured value for

peer-ipaddress is ignored.

The following command example turns IPCP off and BCP on for port 1 of the PoS

module installed in slot 8 of the BlackDiamond switch.

config ppp ipcp off port 8:1

config ppp bcp on port 8:1

Configuring the MPLS Control Protocol

MPLSCP establishes and configures a connection for transporting MPLS labeled frames

across a PPP link. The MPLSCP connection must be established successfully before

MPLS labeled data traffic can flow over the link. Only unicast MPLS labeled packets are

supported. Multicast MPLS labeled packets are discarded by the PoS port.

MPLSCP is not explicitly configured on a PoS port. However, MPLSCP is automatically

enabled on a PoS port when the port is configured for IPCP and MPLS is enabled on

the VLAN that the PoS port is a member of. When MPLSCP is enabled on a PoS port,

the port will transport IP and MPLS labeled packets, and the port must be a member of

one and only one VLAN. Furthermore, no other ports may be members of this VLAN,

and IP routing is the only protocol supported on the VLAN. The one exception to this

rule occurs when APS is enabled. A single VLAN may contain two IPCP-enabled ports

if they are members of the same APS group.

You must have a PoS module and an MPLS module installed in your

BlackDiamond switch to use MPLS on a PoS port.

To configure MPLSCP on a PoS port, complete the following steps:

1 Create a VLAN for the PoS port using the

create vlan <name> command.

2 Add the PoS port to the VLAN using the

config vlan <name> add ports <port>

command.

3 Define an IP router port on the VLAN by assigning an IP address to the VLAN

using the

config vlan <name> ipaddress <ipaddress> {<mask>} command.

4 Disable BCP on the PoS port using the

config ppp bcp off ports <portlist>

command and enable IPCP on the PoS port using the

config ppp ipcp on ports

command.