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3-6 Packet Over SONET Module Installation and User Guide

Configuring the PoS Module

Routing Over PoS Ports

While you can configure BCP to perform routing over PoS ports, IPCP might be a better

choice than BCP in those cases where the link will carry only routed IP traffic, because

it provides a more efficient encapsulation scheme than does BCP, and thereby increases

the maximum link throughput.

To take best advantage of the wire-speed layer 3 routing capabilities of the

BlackDiamond 6800 series switch using the PoS module, configure IPCP as the PPP

network control protocol to route between the PoS ports and any other VLANs. If you

do not configure APS, an IPCP port must be the only port in a VLAN.

Figure 3-2: IPCP configuration

Configuration Commands for IPCP

For the IPCP routing network configuration example shown in Figure 3-2, the default

configuration parameter settings for PoS ports should be suitable for most installations.

Thus, only minimal additional configuration is needed to get IPCP up and running on a

PoS port. The necessary configuration steps are:

1 Create a VLAN for each SONET port using the

create vlan <name> command.

2 Add each SONET port to a VLAN using the

config vlan <name> add

ports <port>

command.

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

using the

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

and enable IF forwarding using the

enable ipforwarding command.

PoS_006

BlackDiamond 1

8:2

1:3

IPCP

8:1

1:1

IPCP

BlackDiamond 2

1234AB5678 1234AB5678

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Extreme Networks PoS Guide de l'utilisateur Page 54