SYSTEM ADMINISTRATOR GUIDE     9/1543-CRA 119 1170/1-V1 Uen C    

Configuring ATM, Ethernet, and POS Ports

© Ericsson AB 2009–2010. All rights reserved. No part of this document may be reproduced in any form without the written permission of the copyright owner.

Disclaimer

The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document.

Trademark List

SmartEdge is a registered trademark of Telefonaktiebolaget LM Ericsson.
NetOp is a trademark of Telefonaktiebolaget LM Ericsson.

Contents

1Overview
1.1Terminology
1.2WAN-PHY Requirements and Restrictions
1.3Related Information

2

Configuration and Operations Tasks
2.1Configuring ATM Ports
2.2Configuring Ethernet Ports
2.3Configuring POS Ports
2.4Port and Channel Monitoring, Operating, and Diagnostic Commands

3

Configuration Examples
3.1ATM Port Examples
3.2Ethernet Port Examples
3.3POS Port Examples
3.4WAN-PHY Example


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).

The SmartEdge router supports ATM, Ethernet, Gigabit Ethernet (GE), and Packet over SONET/SDH (POS) ports on the following traffic cards, controller cards and media interface cards (MICs):

1.1   Terminology

1.2   WAN-PHY Requirements and Restrictions

1.3   Related Information

Other documents with related tasks and commands include:

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.

Note:  
The SmartEdge 1200 chassis does not support first-generation ATM traffic cards.

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, WAN-PHY)

Framing options vary depending on the type of ATM port.

 

Enable subscribers to maintain a steady state.

link-dampening

This command dampens link-state detection to reduce port flaps.

 

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 ATM 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 (ATM DS-3)

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 (ATM OC, POS, WAN-PHY)

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, WAN-PHY)

Enter this command in ATM OC or ATM DS-3 configuration mode.

2.2   Configuring Ethernet Ports

2.2.1   Configure Operational Features for an Ethernet Port

You configure operational features to support normal operations. 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 an Ethernet port and enter port configuration mode.

port ethernet

Enter this command in global configuration mode.


The default configuration of an 10 Gigabit Ethernet port is LAN-PHY.


If the port of the 1-port 10 Gigabit Ethernet card (10ge-1-port) or 1-port 10 Gigabit Ethernet/OC-192c DDR card (10ge-oc192-1-port) is currently configured as WAN-PHY, to change its configuration back to LAN-PHY, you must first delete the existing configuration -- Enter the no port ethernet slot/port wan-phy command, which deletes WAN-PHY operation, then enter the command port ethernet slot/port to enable LAN-PHY.


Similarly, if the port of a 10ge-1-port or 10ge-oc192-1-port is currently configured as LAN-PHY (default), to change its configuration to WAN-PHY, you must first delete the existing configuration -- Enter the no port ethernet slot/port command, which deletes LAN-PHY operation, then enter the command port ethernet slot/port wan-phy to enable WAN-PHY.

2.

Specify attributes for the port. (All attributes are optional.)


Not all configuration tasks apply to all types of Ethernet ports. In the task descriptions that follow, the description applies to all types of ports unless otherwise noted.

 

Configure auto-negotiation parameters for this 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.

 

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.

 

Configure bridge parameters.

bridge

 
 

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

 

Associate a description with the port.

description (port)

 
 

Specify the encapsulation for the port.

encapsulation (Ethernet Port)

 
 

Configure flows on this circuit.

flow apply admission-control profile

 
 

Configure flows on this circuit.

flow apply ip profile

 
 

Explicitly set the flow control mode.

flow-control

This command is for any GE port.

 

Configure forward policy or output.

forward

The use and configuration of the forward output (circuit), forward policy, and other forward commands are found in the Configuring Forward Policies document.

 

Configure SONET/SDH framing.

framing (ATM, POS, WAN-PHY)

Applies to Ethernet card only when configured for WAN-PHY..

 

Configure IGMP related parameters.

igmp maximum bandwidth

 
 

Configure IP access-group properties on this circuit.

ip access-group (circuits)

 
 

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 L2VPN on this Ethernet port.

l2vpn (ctx-name)

 
 

Specify the LACP priority for aggregation.

lacp priority

 
 

Dampen the line state detection to reduce port flaps.

link-dampening

This command dampens link-state detection to reduce port flaps.

 

Add the port to an existing link group.

link-group

 
 

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.

 

Change media MTU size.

mtu (ATM, Ethernet, POS)

 
 

Configure QoS parameters.

qos

See the qos commands described in "Configuring Circuits for QoS."

 

Configure RADIUS NAS-Port-ID attribute.

radius attribute nas-port-id

 
 

Configure RADIUS NAS-Port-Type attribute.

radius attribute nas-port-type

 
 

Configure QoS rate parameters.

rate circuit

 
 

Set CLIPS DHCP parameters.

service clips dhcp

 
 

Set CLIPS DHCP parameters.

service clips-group

 
 

Enable static CLIPS.

service clips (static)

 
 

Configure Rapid Spanning-Tree Profile (RSTP) parameters.

spanning-tree profile

 

3.

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.

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, WHY-PHY)

Enter this command in port configuration mode.


Applies to all supported Ethernet types including WAN-PHY.

Specify the text string to be traced on a WAN-PHY port.

path-trace (ATM OC, POS, WAN-PHY)

Applies to Ethernet cards only when configured for WAN-PHY.

Set bit error-rate test (BERT) Thresholds

threshold

Applies to Ethernet cards only when configured for WAN-PHY.

2.2.3   show port detail Command for an Ethernet WAN-PHY Port

The following output fields of the show port detail command have information for Ethernet WAN-PHY ports. For additional information see show port detail.:

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, WAN-PHY)

 
 

Enable subscribers to maintain a steady state.

link-dampening

This command dampens link-state detection to reduce port flaps.

 

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

To configure a POS port for APS, perform the tasks described in Table 6.

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.

Note:  
POS APS is not supported on the POS 8-port OC-3c/STM-1c, 4-port OC-12c/STM-4c, and 4-port OC-48c/STM-16c cards.

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 (ATM OC, POS, WAN-PHY)

 

Change to a loopback state on a port to test port operation.

loopback (ATM, POS, Ethernet, WAN-PHY)

 

2.4   Port and Channel Monitoring, Operating, and Diagnostic Commands

You can display various types of information about ATM, Ethernet, Packet over SONET/SDH (POS), WAN-PHY, 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 statistics for the specified port, a specific channel, all channels on a channelized port, or all channels in the system.

clear 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 performance monitoring (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

3.4   WAN-PHY Example

The following example illustrates the configuration of the 1-port 10 Gigabit Ethernet card (10ge-1-port)) for WAN-PHY operation.

3.4.1   WAN-PHY Configuration

[local]Redback(config)#card 10ge-1-port 12
[local]Redback(config-card)#no shutdown
[local]Redback(config-card)#exit
[local]Redback(config)#port ethernet 12/1 wan-phy
Note: Creating a port may cause the card to reload. Commit to continue; abort to exit without change
[local]Redback(config-port)#no shutdown
[local]Redback(config-port)#commit
Marking PTD channel DEAD for slot 12
Feb 10 17:11:13: %CSM-6-CARD: Card in slot 12 entering In Service state.
Feb 10 17:11:13: %CSM-6-CARD: card 10ge-1-port REMOVED in slot 12
Transaction committed.                                                     //See Note 1

Feb 10 17:11:23: %CSM-6-CARD: card 10ge-1-port INSERTED in slot 12
Feb 10 17:11:27: %PPAINFRA-6-ISTART_INFO: 1d891d12/0000000001/201800000:12/IPPA/EU00:Ready to receive packets
Feb 10 17:11:27: %PPAINFRA-6-ISTART_INFO: 1f7ca31f/0000000001/289200000:12/EPPA/EU00:Ready to receive packets
Feb 10 17:11:27: %CSM-6-CARD: Card in slot 12 entering In Service state.
Feb 10 17:11:27: %CSM-6-CARD: card 10ge-1-port INSERTED in slot 12 READY
Feb 10 17:11:34: %CSM-6-PORT: ethernet 12/1 link state UP, admin is UP

Note 1: The initial configuration for WAN-PHY causes the 10GE card to momentarily go out of service while it reloads.

!
!comment: WAN-PHY ATM options are configured:
!
[local]Redback#configure
Enter configuration commands, one per line, 'end' to exit
[local]Redback(config)#port ethernet 12/1 wan-phy
[local]Redback(config-port)#framing sdh
[local]Redback(config-port)#path-trace  Ericsson Path
[local]Redback(config-port)#no loopback
[local]Redback(config-port)#threshold sd-ber 9
[local]Redback(config-port)#threshold sf-ber 5
[local]Redback(config-port)#commit
Transaction committed.
[local]Redback(config-port)#Feb 10 17:14:13: %CSM-6-PORT: ethernet 12/1 link state UP, admin is UP
[local]Redback(config-port)#end

3.4.2   WAN-PHY Status

The Ethernet WIS MIB is supported by the SmartEdge router.

Use the following commands to check WAN-PHY CLI status:

[local]Redback#show port 12/1 detailethernet 12/1 state is Up
Description                :
Line state                 : Up
Admin state                : Up
Link Dampening             : disabled
Undampened line state      : Up
Dampening Count            : 0
Encapsulation              : ethernet
MTU size                   : 1500 Bytes
MAC address                : 00:30:88:13:31:a0
Physical layer             : wan-phy
Media type                 : 10000Base-SW
Flow control               : on
Speed                      : 10 Gbps
Duplex mode                : full
Clock-Source               : local
Link Distance              : N/A
Loopback                   : none
Framing                    : SDH
Line SF BER                : 10E-5
Line SD BER                : 10E-9
XFP Transceiver Status
 Wavelength                : 850.00 nm
 Diag Monitor              : Yes
 Tx Fault                  : No Fault
 Rx Fault                  : No Fault
 Tx Pwr measured[dbm]      : -1.60
 Rx Pwr measured[dbm]      : -10.79
 Temperature               : 33 C
Active Alarms              : NONE
Path Alarms                : NONE
Tx path-trace              :
    45726963 73736f6e 20506174 68000000  Redback Path...
Rx path-trace              :
    45726963 73736f6e 20506174 68000000  Redback Path...
!


[local]Redback#show port counters 12/1 detail

Counters for port ethernet 12/1 - Interval: 00:00:11

PPA Port Counters
packets sent       : 133449940          bytes sent         : 8006996400
packets recvd      : 133452256          bytes recvd        : 8007135360
send packet rate   : 0.00               send bit rate      : 0.00
recv packet rate   : 0.00               recv bit rate      : 0.00
IP mcast pkts rcv  : 0                  IP mcast bytes rcv : 0
IP mcast pkts sent : 0                  IP mcast bytes snt : 0
rate refresh interval : 60 seconds

PPA Input Error Counters
idc other errors   : 0                  crc port errors    : 0
idc overrun errors : 0                  idc abort errors   : 0
no cct packets     : 0                  no cct bytes       : 0
cct down pkts      : 0                  cct down bytes     : 0
unknown encap pkts : 0                  unknown encap byte : 0
unreach pkts       : 0                  unreach bytes      : 0
media filter pkts  : 0                  media filter bytes : 0

PPA Output Error Counters
WRED drop pkts     : 0                  tail drop pkts     : 0
adj drop pkts      : 0                  adj drop bytes     : 0

Packet Drop Counters
not IPv4 drop pkts : 0                  bad IP checksum    : 0
unhandled IP optns : 0                  link layer bcast   : 0
bad IP length      : 0

Policing Counters
conform pkts       : 0                  conform bytes      : 0
conform drop pkts  : 0                  conform drop bytes : 0
exceed pkts        : 0                  exceed bytes       : 0
exceed drop pkts   : 0                  exceed drop bytes  : 0
violate pkts       : 0                  violate bytes      : 0
violate drop pkts  : 0                  violate drop bytes : 0

General Counters
packets sent       : 135335078          packets recvd      : 135335018
bytes sent         : 8661444992         bytes recvd        : 8120101080
mcast pkts sent    : 0                  mcast pkts recvd   : 0
bcast pkts sent    : 0                  bcast pkts recvd   : 0
dropped pkts out   : 0                  dropped pkts in    : 0
pending pkts out   : 0                  pending pkts in    : 0
port drops out     : 0                  port drops in      : 0

Transmit Counters
underflow          : 0                  eth 64 octets      : 0
late collision     : 0                  eth 65-127 octs    : 135335078
regular collision  : 0                  eth 128-255 octs   : 0
single collision   : 0                  eth 256-511 octs   : 0
multiple colls     : 0                  eth 512-1023 octs  : 0
excessive colls    : 0                  eth 1024-1518 octs : 0
deferred           : 0                  eth > 1518 octs    : 0
error pkts sent    : 0                  flow control       : 0
error bytes sent   : 0

Receive Counters
jabber             : 0                  eth 64 octets      : 135335018
false carrier      : 0                  eth 65-127 octs    : 0
runt frames        : 0                  eth 128-255 octs   : 0
undersized frames  : 0                  eth 256-511 octs   : 0
oversized frames   : 0                  eth 512-1023 octs  : 0
crc errors         : 0                  eth 1024-1518 octs : 0
alignment errors   : 0                  eth > 1518 octs    : 0
symbol errors      : 0                  flow control       : 0
error pkts rcvd    : 0                  overflows          : 0
error bytes rcvd   : 0                  overflow bytes     : 0

Packet-Over-Sonet physical layer statistics
Active Alarms              : NONE

Sonet Section
     LOS : 1                  LOF : 2                  BIP-B1 : 0

Sonet Line
     AIS : 2                  RDI : 1                  BIP-B2 : 0
    FEBE : 0

Sonet Path
     AIS : 2                  RDI : 1                  BIP-B3 : 0
    FEBE : 0                  LOP : 0

3.4.3   Insertion of WAN-PHY Line Loopback

In the following example, a line loopback is enabled and normal packet traffic cannot pass through the WAN-PHY port. A port fault is detected and the port shows an active line loopback.

The Active Alarms field shows a facility loopback is active, which is the same as a line loopback.

[local]Redback#config
Enter configuration commands, one per line, 'end' to exit
[local]Redback(config)#port ethernet 12/1 wan-phy
[local]Redback(config-port)#loopback line
[local]Redback(config-port)#end
Feb 10 17:13:37: %CSM-6-PORT: ethernet 12/1 link state DOWN, admin is UP
Feb 10 17:13:37: %CSM-6-PORT: ethernet 12/1 link state down, trigger source: [V] Port fault detected
!
!comment: A Port fault is reported when normal packet traffic cannot pass through the port.
!
[local]Redback#show port 12/1 detail
[local]Redback#show port 12/1 detail
ethernet 12/1 state is Down
Description                :
Line state                 : Down
Admin state                : Up
Link Dampening             : disabled
Undampened line state      : Down
Dampening Count            : 0
Encapsulation              : ethernet
MTU size                   : 1500 Bytes
MAC address                : 00:30:88:13:31:a0
Physical layer             : wan-phy
Media type                 : 10000Base-SW
Flow control               : on
Speed                      : 10 Gbps
Duplex mode                : full
Clock-Source               : loop
Link Distance              : N/A
Loopback                   : line
Framing                    : SDH
Line SF BER                : 10E-5
Line SD BER                : 10E-9
XFP Transceiver Status
 Wavelength                : 850.00 nm
 Diag Monitor              : Yes
 Tx Fault                  : No Fault
 Rx Fault                  : No Fault
 Tx Pwr measured[dbm]      : -1.60
 Rx Pwr measured[dbm]      : -10.78
 Temperature               : 32 C
Active Alarms              : Port facility loopback enabled
Path Alarms                : NONE
Tx path-trace              :
    45726963 73736f6e 20506174 68000000  Ericsson Path...
Rx path-trace              :
    52656462 61636b00 00000000 00000000  Redback.........