Understanding the P2-100GE-OTN PIC

Interface Features

The following interface features are supported on a P2-100GE-OTN PIC:

• 4-port 100-Gigabit Ethernet interfaces, which are independently configurable in LAN PHY framing mode or in OTU4 signal mode. Each interface is terminated by means of a CFP2 transceiver.

• Each port maps to a single Packet Forwarding Engine in the FPC2-PTX-P1A FPC.

• The interfaces are named with prefix et.

• Gigabit Ethernet local loopback.

• Link-level pause frames—You can halt the Ethernet interface from transmitting packets for a configured period of time.

• Interface hold timer and interface damping—You can set the hold-time statement (in milliseconds) to damp interface transitions.

• External clock

• Nonstandard tag protocol identifier (TPID):

  • For each 100-Gigabit Ethernet port, you can configure up to eight TPIDs by using the tag-protocol-id statement at the [edit interfaces interface-name gigether-options ethernet-switch-profile] hierarchy level.

  • The tag-protocol-id statement can be configured only on the first port (port 0) of the PIC. If any other (nonzero) port has the tag-protocol-id configuration, the Routing Engine registers an error in the system log and the configuration is ignored.

  • The tag-protocol-id statement configured on port 0 of the PIC also applies to the rest of the ports on that PIC.

• The interface Link Down event always generates an interrupt; however, the interface Link Up event does not generate an interrupt. Therefore, the interface link-up event is detected during the 1-second PIC periodic polling process.

• Generic forward error correction (GFEC) (G.709) and no-FEC modes of operation.

• Diagnostics tools:

  • Line loopback

  • Local loopback

• Fast reroute (FRR)—Based on configurable pre-FEC, bit error rate (BER) is supported and is configured using the ber-threshold-signal-degrade statement at the [edit interfaces interface-name otn-options signal-degrade] hierarchy level.

• jnx-ifotn.mib and otn-mib as defined in RFC 3591. Note that according to Junos OS security standard, configurable parameters are not supported through SNMP. Only the get operation is available through SNMP.

• FEC statistics—corrected errors and corrected error ratio.

• OTN payload pseudorandom binary sequence (PRBS) generation and checking by enabling or disabling PRBS with the prbs or no-prbs statement at the [edit interfaces interface-name otn-options] hierarchy level.

• Optical channel data unit (ODU)-level delay measurement.

• At the physical interface level, flexible-ethernet-service, ethernet-ccc, and ethernet-tcc encapsulations are supported. For the flexible-ethernet-service encapsulation, the logical level supports enet2, vlan-ccc, and vlan-tcc encapsulations.

• At the logical interface level, dix, vlan-ccc, and vlan-tcc encapsulations are supported.

• Interoperability between 100-Gigabit Ethernet interfaces with CFP transceiver and 100-Gigabit Ethernet interfaces with CFP2 transceiver in LAN PHY framing mode and in OTU4 mode.

The following features are not supported on the P2-100GE-OTN PIC:

• Source MAC learning for accounting

• MAC policing

• Physical interface-level encapsulations—vlan-ccc, extended-vlan-ccc, and extended-vlan-tcc

• Logical interface-level encapsulation—vlan-vpls

• VLAN rewrite for ccc encapsulation

• Per-queue flow control

• Generic framing procedure-framed (GFP-F) mapping modes over OTN

• General communication channel (GCC)

• OTN interface-level Automatic Protection Switching (APS)

• Insertion, monitoring, and display of OTN header overhead byte

• Black link MIB for integration with transponders

• Optical harness support

• Transport interface and state model (GR-1093)

• Trace tone support

• 15-minute and 1-day performance monitoring counters and historic counters

Layer 2 and Layer 3 Features

The following Layer 2 and Layer 3 features are supported on the P2-100GE-OTN PIC:

• MAC detect link up and link down based on local fault signal or remote fault signal.

• MAC statistics.

• Flow control.

• MAC oversized packet counters based on default MTU value or user-configured MTU value.

• Per-port destination address MAC filter.

• Per-port source address MAC filter.

• Per-physical interface source address MAC filter.

• Per-logical interface source address MAC accounting.

• Maximum of 1000 source MAC filter per physical interface.

• Maximum of 32,000 filter terms to share across all filter features.

• Aggregated Ethernet supports 64 child links that can be configured using the set chassis aggregated-devices maximum-links configuration command.

• Maximum of 1024 logical interfaces on an aggregated Ethernet physical interface.

• Support for VLAN tagging, flexible VLAN tagging, and stacked VLAN tagging.

• LACP.

• Link protection.

• 802.3 ah OAM.

• 802.1 ag OAM.

• MPLS FRR.

• SNMP.

• Supports per-VLAN queuing (using Packet Forwarding Engine).

OTN Alarms and Defects

The following OTN alarms and defects are supported on the P2-100GE-OTN PIC:

• LOS—Loss Of Signal

• LOF—Loss Of Frame

• LOM—Loss Of Multiframe

• OTU—Degrade

• OTU—AIS

• OTU—IAE

• OTU—BDI

• OTU—TTIM

• OTU—Signal Degrade

• OTU—Signal Fail

• ODU—Signal Fail

• OTU-FEC—Degrade

• OTU-FEC—Excessive errors

• ODU—Signal Degrade

• ODU—AIS

• ODU—BDI

• ODU—OCI

• ODU—LCK

• ODU—TTIM

• OPU—PTM

TCA Alarms

Threshold-crossing alarms (TCA) are alarms that are activated when a certain configurable threshold—near-end measurement threshold or far-end measurement threshold—is crossed and remains so until the end of the 15 minute interval for parameters such as OTU and ODU. The following alarms are supported:

• Background block error threshold (BBE)

• Errored seconds threshold (ES)

• Severely errored seconds threshold (SES)

• Unavailable seconds threshold (UAS)