Configuring ATM, Ethernet, and POS Ports

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1 Overview

This document describes how to configure, monitor, and administer the following types of ports: Asynchronous Transfer Mode (ATM), Ethernet, and Packet over SONET/SDH (POS) ports.

In the SmartEdge router, traffic cards are the individual I/O cards; ports are the physical interfaces on the traffic cards. The SmartEdge router supports many different types of traffic cards and ports. The ATM, Ethernet, Gigabit Ethernet (GE), and Packet over SONET/SDH (POS) ports described in this document are ports on the following traffic and controller cards and media interface cards (MICs). The Ethernet and Gigabit Ethernet (GE) ports described in this document are ports on the following traffic and controller cards:

1.1 Terminology

In the following descriptions, the term controller card refers to any version of the Cross-Connect Route Processor (XCRP) Controller card (XCRP, XCRP3, XCRP4), including the controller carrier card, unless otherwise noted.

The term controller carrier card refers to the controller functions on the circuit board within the SmartEdge 100 chassis; these functions are compatible with the XCRP3 Controller card. The term I/O carrier card refers to the traffic card functions on the circuit board; these functions are compatible with the similar functions that are implemented on all SmartEdge 400 and SmartEdge 800 traffic cards.

The term chassis refers to any SmartEdge router; the term SmartEdge 800 refers to any version of the SmartEdge 800 chassis; the term SmartEdge 800s refers only to the SmartEdge 800s chassis.

The term traffic card refers to a SmartEdge 100 media interface card (MIC) or a SmartEdge 400 or SmartEdge 800 traffic card, unless otherwise noted.

The term Gigabit Ethernet refers to any Ethernet traffic card that supports a port speed of 1 Gbps or greater; unless explicitly stated, the speed of any Gigabit Ethernet port is 1 Gbps.

The second-generation ATM OC traffic cards follow. The second-generation cards have more memory and support more ATM permanent virtual circuits (PVCs) and enhanced queuing and traffic-shaping capabilities than the first-generation cards:

1.2 Related Information

2 Configuration and Operations Tasks

2.1 Configuring ATM Ports

ATM ports are of two types: those on an ATM OC traffic card or MIC, such as the ATM OC-12c/STM-4c, and those on the ATM DS-3 traffic card. You configure ATM OC ports in ATM OC configuration mode and ATM DS-3 ports in ATM DS-3 configuration mode. Not all configuration tasks apply to all types of cards and ports; in the task descriptions that follow, the configuration mode indicates the type of port to which the task applies.

2.1.1 Configure Operational Features for an ATM Port

You configure operational features to support normal operations. If you intend to configure the port as a working or protect Automatic Protection Switching (APS) port, review the configuration guidelines for ATM ports in the document, Configuring APS MSP, before proceeding. To configure operational features for an ATM port, perform the tasks described in Table 1. Unless otherwise noted, enter all commands in either ATM DS-3 or ATM OC configuration mode, depending on the type of port you are configuring.

*Table 1 Configure Operational Features for an ATM Port*
Step	Task	Root Command	Notes
1.	Select (begin the configuration of) an ATM port and access either ATM OC or ATM DS-3 configuration mode.	port atm	Enter this command in global configuration mode.
2.	Specify general attributes for the port (all attributes are optional):
	Associate a description with the port.	description (port)
	Specify the framing.	framing (ATM, POS)	Framing options vary depending on the type of ATM port.
	Enable subscribers to maintain a steady state.	link-dampening
	Specify the MTU payload size without fragmentation.	mtu (card)
	Assign a different MAC address.	mac-address (ATM)	The default MAC address is assigned based on the MAC address extracted from the EEPROM of the card.
	Disable ATM cell payload scrambling.	atm scramble	Use the `no` form to disable this feature.
	Specify the over-subscription rate allowed on an ATM DS-3 or ATM OC port.	over-subscription-rate
	Apply an existing bulkstats schema profile to the port.	bulkstats schema
3.	Specify port-type specific attributes for the port (all attributes are optional):
	Enable port to remain up after alarm reception.	alarm-report-only	Enter this command in ATM OC configuration mode. This command does not apply to ATM DS-3 ports.
	Specify the cable length.	cablelength (ATM)	Enter this command in ATMS DS-3 configuration mode. This command is for ATM DS-3 ports only.
	Specify the clock source.	clock-source (port)	This command is for ATM DS-3 and second-generation ATM OC ports only.
	Enable port listening mode.	ccod-mode port-listen	This command is for ATM DS-3 and second-generation ATM OC ports only.
	Enable the port to respond to or ignore remote loopback requests.	equipment-loopback	This command is for ATM DS-3 ports only.
	Specify the SONET/SDH SD-BER or SF-BER threshold for a SONET/SDH port.	threshold	This command is for first- and second-generation ATM OC ports only. Enter this command for each threshold to be specified.
4.	Enable the port (begin operations on it).	shutdown (ATM)	Use the `no` form to enable the port.

You are now ready to add the port to an APS group or configure ATM virtual paths (VPs) and permanent virtual circuits (PVCs) on the port. After you add an ATM port to an APS group as a working port, you can configure its VPs and PVCs. For information about configuring ATM VPs and PVCs, see Configuring Circuits.

2.1.2 Configure Maintenance Features for an ATM Port

You configure maintenance features only if the port is experiencing problems. To configure maintenance features for an ATM port, perform one or both of the tasks described in Table 2.

*Table 2 Configure Maintenance Features for an ATM Port*
Task	Root Command	Notes
Specify the text string to be traced on a port on a second-generation ATM OC traffic card.	path-trace (POS/ATM OC)	Enter this command in ATM OC configuration mode. This command is available only for ports on second-generation ATM OC traffic cards.
Change to a loopback state on a port to test port operation.	loopback (ATM, POS, Ethernet)	Enter this command in ATM OC or ATM DS-3 configuration mode.

2.2 Configuring Ethernet Ports

Ethernet ports are of three types: the management port on a controller card, ports on a 10/100 Ethernet, and ports on any version of the Gigabit Ethernet traffic cards. You configure any of these types of ports in port configuration mode. Not all configuration tasks apply to all types of ports. In the task descriptions that follow, the description applies to all types of ports unless otherwise noted.

2.2.1 Configure Operational Features for an Ethernet Port

You configure operational features to support normal operations. To configure operational features for an Ethernet port, perform the tasks described in Table 3; enter all commands in port configuration mode, unless otherwise noted.

*Table 3 Configure Operational Features for an Ethernet Port*
Step	Task	Root Command	Notes
1.	Select (begin the configuration of) an Ethernet port and access port configuration mode.	port ethernet	Enter this command in global configuration mode.
2.	Specify general attributes for the port (all attributes are optional):
	Associate a description with the port.	description (port)
	Specify the encapsulation for the port.	encapsulation (Ethernet Port)
	Specify the MTU payload size without fragmentation.	mtu (card)
	Specify the LACP priority for aggregation.	lacp priority
	Apply an existing bulkstats schema profile to the port.	bulkstats schema	Use this command only if you are not adding the port to a link group
3.	Specify card-specific attributes for the port (all attributes are optional):
	Specify the speed and duplex mode for an FE port.	medium (fast-ethernet)	This command is for a port on a 10/100 Ethernet or FE-GE traffic card only.
	Specify the duplex mode for a SmartEdge 100 native or GE port.	duplex	This command is ignored if auto-negotiation is enabled.
	Specify the speed for a SmartEdge 100 native or GE port.	speed (port)	This command is ignored if auto-negotiation is enabled.
	Specify the interface for a SmartEdge 100 native port.	medium-type	This command is for SmartEdge 100 native ports only.
	Configure auto-negotiation parameters for this GE port. Define the speed and duplex mode parameters to be negotiated for a 1000Base-T SmartEdge 100 GE port.	auto-negotiate	Use the `no` form to disable this feature. Auto-negotiation is required for copper-based GE ports. This command is for GE ports, but does not apply to ports on 10GE traffic cards.
	Explicitly set the flow control mode.	flow-control	This command is for any GE port.
	Associate the port with the IP address and MAC address of the remote host on the circuit.	ip host (port)	This command is for an IPoE encapsulated or 802.1Q encapsulated Ethernet port.
	Enable the port to maintain a steady state for subscribers.	link-dampening	This command is not for the Ethernet management port.
	Add the port to an existing link group.	link-group
	Bind the port to an existing interface in an existing context.	bind interface	Use this command only if you have not added the port to a link group, or if you do not intend to create 802.1Q PVCs on it.
4.	Enable the port (begin operations on it).	shutdown (Card)	Enter this command in the mode matching the type of port you are configuring, or in port configuration mode. Use the `no` form to enable the port.

You are now ready to use the port or configure 802.1Q PVCs on it. For information about configuring 802.1Q PVCs, see Configuring Circuits.

2.2.2 Configure a Maintenance Feature for an Ethernet Port

You configure a maintenance feature only if the port is experiencing problems. To configure a maintenance feature for an Ethernet port, perform the task described in Table 4.

*Table 4 Configure a Maintenance Feature for an Ethernet Port*
Task	Root Command	Notes
Change to a loopback state on a port to test port operation.	loopback (ATM, POS, Ethernet)	Enter this command in port configuration mode.

2.3 Configuring POS Ports

A POS port is a port on an OC-3c/STM-1c, OC-12c/STM-4c, OC-48c/STM-16c, or OC-192c/STM-64c traffic card. You configure a POS port on any of these cards in port configuration mode.

2.3.1 Configure Operational Features

You configure operational features to support normal operations. If you intend to configure the port as a working or protect APS port, review the configuration guidelines for POS ports in the document, Configuring APS MSP, before proceeding. To configure operational features for a POS port, perform the tasks described in Table 5. Enter the commands in port configuration mode, unless otherwise noted.

*Table 5 Configure Operational Features for a POS Port*
Step	Task	Root Command	Notes
1.	Select (begin the configuration of) a POS port and access port configuration mode.	port pos	Enter this command in global configuration mode.
2.	Specify general attributes for the port (all attributes are optional):
	Enable port to remain up after alarm reception.	alarm-report-only
	Associate a description with the port.	description (port)
	Specify the clock source.	clock-source (port)	This command is for second-generation POS OC-48c/STM-16c ports only.
	Specify the framing.	framing (ATM, POS)
	Enable subscribers to maintain a steady state.	link-dampening
	Specify the MTU payload size without fragmentation.	mtu (card)
	Specify the exponent of the SD-BER and SF-BER thresholds.	threshold	Enter this command for each threshold to be specified.
	Disable SPE scrambling.	scramble	Use the `no` form to disable this feature.
	Define the value for the C2 byte.	c2byte
	Specify a 16-bit CRC.	crc16	We recommend the 32-bit CRC.
	Specify the encapsulation type.	encapsulation (POS)
	Apply an existing bulkstats schema profile to the port.	bulkstats schema
3.	Specify the parameters for the Cisco HDLC keepalive function.	keepalive (POS)
4	Bind the port to an existing interface in an existing context.	bind interface	Use this command only if you do not intend to create Frame Relay PVCs on it or add it to an APS group.
5.	Enable the port (begin operations on it).	shutdown (ATM)	Use this command only if you do not intend to add it to an APS group. Use the `no` form to enable the port.

You are now ready to add the port to an APS group, use the port, or configure Frame Relay PVCs on it. For information about configuring Frame Relay PVCs, see Configuring Circuits.

2.3.2 Configure a POS Port for APS

*Table 6 Configure a POS Port for APS*
Step	Task	Root Command	Notes
1.	Enable the port (begin operations on it).	shutdown (ATM)	Enter this command in port configuration mode. Use the `no` form to enable the port.
2.	Assign the port as a working or protect port in an APS group.	aps	Enter this command in port configuration mode. You must enable the port before you can add it to an APS group.
3.	Bind the port to an existing interface in an existing context.	bind interface	Enter this command in port configuration mode. You bind only the working port after you assign it to an APS group; you do not bind the protect port.

2.3.3 Configure Maintenance Features for a POS Port

You configure the maintenance features only if the port is experiencing problems. To configure the maintenance features for a POS port, perform one or both of the tasks described in Table 7. Enter all commands in port configuration mode.

*Table 7 Configure Maintenance Features for a POS Port*
Task	Root Command	Notes
Specify a path trace message.	path-trace (POS/ATM OC)
Change to a loopback state on a port to test port operation.	loopback (ATM, POS, Ethernet)

2.4 Port and Channel Operations

You can display various types of information about ATM, Ethernet, Packet over SONET/SDH (POS), clear-channel ports and channels, and channelized ports and channels; clear port counters; and test port and channel operation by performing the appropriate task listed in Table 8. Enter the clear commands in exec mode; enter the show commands in any mode.

*Table 8 Port and Channel Operations*
Task	Root Command
Clear counters associated with the specified port or channel.	clear port counters
Clear performance-monitoring (PM) statistics for the specified port, a specific channel, all channels on a channelized port, or all channels in the system.	show port perf-monitor
Display the current status of one or more ports or channels, and provide continuous updates to the status.	monitor port
Display the bindings for one or more interfaces and the ports to which they are bound.	show ip interface
Display a list of the ports in the system.	show port
Display general counters and counters specific to the port or channel type.	show port counters
Display the medium access control (MAC) address and other lower-layer settings of a single port, all ports on a card, or all ports in the system; display configuration information and other lower-layer settings, including channels, for a single port, all ports on a card, or all ports in the system.	show port detail
Display configuration information and PM statistics for a specific port or channel.	show port perf-monitor
Display detailed information about the transceivers installed in the SmartEdge router, including their current status	show port transceiver

3 Configuration Examples

3.1 ATM Port Examples

The follow example shows how to configure port 1 on a 2-port ATM OC-3c/STM-1c traffic card in slot 4. ATM cell payload scrambling and Synchronous Optical Network (SONET) framing are enabled by default. The port is not bound to an interface because it has ATM PVCs configured on it:

[local]Redback(config)#port atm 4/1
[local]Redback(config-atm-oc)#description 2-port ATM OC-3c/STM-1c port
[local]Redback(config-atm-oc)#alarm-report-only plm-p
[local]Redback(config-atm-oc)#mtu 4000
[local]Redback(config-atm-oc)#threshold sd-ber 6
[local]Redback(config-atm-oc)#threshold sf-ber 5
[local]Redback(config-atm-oc)#over-subscription-rate 100
[local]Redback(config-atm-oc)#no shutdown

3.2 Ethernet Port Examples

The following example shows how to configure port parameters for port 1 on a 12-port 10/100 Ethernet traffic card in slot 2. The port is not bound to an interface because it will have 802.1Q PVCs configured on it:

[local]Redback(config)#port ethernet 2/1
[local]Redback(config-port)#description SNMP port
[local]Redback(config-port)#mtu 1000
[local]Redback(config-port)#medium auto
[local]Redback(config-port)#no shutdown

3.3 POS Port Examples

The following example shows how to configure port parameters for port 1 on a 4-port POS OC-12c/STM-4c traffic card in slot 3. Payload scrambling is enabled (by default) with the default value for the C2 byte along with the default CRC32. The port is not bound to an interface because it has Frame Relay PVCs configured on it:

[local]Redback(config-card)#port pos 3/1
[local]Redback(config-port)#description POS OC-12c/STM-4c port
[local]Redback(config-port)#framing sdh
[local]Redback(config-port)#encapsulation frame-relay
[local]Redback(config-port)#no shutdown

SmartEdge		is a registered trademark of Telefonaktiebolaget L M Ericsson.
NetOp		is a trademark of Telefonaktiebolaget L M Ericsson.

1	Overview
1.1	Terminology
1.2	Related Information
2	Configuration and Operations Tasks
2.1	Configuring ATM Ports
2.2	Configuring Ethernet Ports
2.3	Configuring POS Ports
2.4	Port and Channel Operations
3	Configuration Examples
3.1	ATM Port Examples
3.2	Ethernet Port Examples
3.3	POS Port Examples