Understanding the network.pdf - Back to Home

• — Displays global inbound and outbound ATM traffic
information
• —Displays information about all the PVCs and SVCs on the
router
• —Displays ATM interface processor
information
Packet over SONET
A Packet over SONET (POS) interface is available for Cisco 7×00 series routers. POS
interface is a single (SONET stub) OC-3155Mbps single-mode fiber
SONET-compatible interface. The POS interface configuration process is similar to
the one followed when configuring other integrated WAN interface controllers.
In addition to the Layer 3 address configuration, the interface's framing type and
clocking source must be set. An MTU size adjustment option is also available. The
POS interface is configured by using the global configuration command . After the interface processor is selected, the remaining
configuration commands are POS interface specific subcommands (aside from Layer
3 addressing). The POS interface's default settings are SDH framing, remote clock,
and the default OC-3 interface MTU, 4,470 bytes. Therefore, you may only need to
perform Layer 3 address configuration:
thor(config)#interface pos 1/0
thor(config-if)#ip address 172.16.55.1 255.255.255.252
To configure the POS interface controller to transmit clock information, use the
command posi internal-clock.
To use STM-1 framing, use the command posi framing-sdh.
To adjust the MTU size to reflect the LAN packet media (which is 1,500 in most
cases), use mtu 1500.
Summary
The goal of this chapter was to increase your Cisco IOS configuration knowledge on
subjects directly applicable (but not exclusive) to enterprise networking concerns.
You should now have a familiarity with the following subjects: