Cisco ONS 15454 and Cisco ONS 15454 SDH Ethernet Card Software Feature and Configuration Guide, Release 8.0
Chapter 1, ML-Series Card Overview
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ML-Series Card Overview

Table Of Contents

ML-Series Card Overview

ML-Series Card Description

ML-Series Feature List

ML-Series Card Overview

This chapter provides an overview of the ML1000-2, ML100T-12, and ML100X-8 cards for the ONS 15454 (SONET) and ONS 15454 SDH. It lists Ethernet and SONET/SDH capabilities and Cisco IOS and Cisco Transport Controller (CTC) software features, with brief descriptions of selected features.

This chapter contains the following major sections:

ML-Series Card Description

ML-Series Feature List

ML-Series Card Description

The ML-Series cards are independent Gigabit Ethernet (ML1000-2) or Fast Ethernet (ML100T-12 and ML100X-8) Layer 3 switches that process up to 5.7 million packets per second (Mpps). The ML-Series cards are integrated into the ONS 15454 SONET or the ONS 15454 SDH.

The ML-Series card uses Cisco IOS, and the Cisco IOS command-line interface (CLI) is the primary user interface for the ML-Series card. Most configuration for the card, such as Ethernet port, bridging, and VLAN, can be done only through the Cisco IOS CLI.

However, CTC, the ONS 15454 SONET/SDH graphical user interface (GUI), also supports the ML-Series card. SONET/SDH circuits cannot be provisioned through Cisco IOS, but must be configured through CTC or Transaction Language One (TL1). CTC offers ML-Series card status information, SONET/SDH alarm management, Cisco IOS Telnet session initialization, Cisco IOS configuration file management, provisioning, inventory, and other standard functions.

The ML100T-12 features twelve RJ-45 interfaces, and the ML100X-8 and ML1000-2 features two Small Form-factor Pluggable (SFP) slots supporting short wavelength (SX) and long wavelength (LX) optical modules. All three cards use the same hardware and software base and offer similar feature sets. For detailed card specifications, refer to the "Ethernet Cards" chapter of the Cisco ONS 15454 Reference Manual or the Cisco ONS 15454 SDH Reference Manual.

The ML-Series card features two virtual packet-over-SONET/SDH (POS) ports, which function in a manner similar to OC-N/STM-N card ports. The SONET/SDH circuits are provisioned through CTC in the same manner as standard OC-N/STM-N card circuits. The ML-Series POS ports support virtual concatenation (VCAT) of SONET/SDH circuits and a software link capacity adjustment scheme (SW-LCAS).

ML-Series Feature List

The ML100T-12, ML100X-8, and ML1000-2 cards have the following features:

Layer 1 data features:

10/100BASE-TX half-duplex and full-duplex data transmission

1000BASE-SX, 1000BASE-LX full-duplex data transmission

IEEE 802.3z (Gigabit Ethernet) and IEEE 802.3x (Fast Ethernet) Flow Control

SONET/SDH features:

High-level data link control (HDLC) or frame-mapped generic framing procedure (GFP-F) framing mechanism for POS

Two POS virtual ports

LEX, Cisco HDLC, or Point-to-Point Protocol/Bridging Control Protocol (PPP/BCP) encapsulation for POS


G-Series card and ONS 15327 E-Series card compatible (with LEX encapsulation only)

Layer 2 bridging features:

Transparent bridging

MAC address learning, aging, and switching by hardware

Protocol tunneling

Multiple Spanning Tree (MST) protocol tunneling

255 active bridge group maximum

60,000 MAC address maximum per card and 8,000 MAC address maximum per bridge group

Integrated routing and bridging (IRB)

IEEE 802.1P/Q-based VLAN trunking

IEEE 802.1Q VLAN tunneling

IEEE 802.1D Spanning Tree Protocol (STP) and IEEE 802.1W Rapid Spanning Tree Protocol (RSTP)

IEEE 802.1D STP instance per bridge group

Ethernet over Multiprotocol Label Switching (EoMPLS)

EoMPLS traffic engineering (EoMPLS-TE) with RSVP

VLAN-transparent and VLAN-specific services (Ethernet Relay Multipoint Service [ERMS])

RPR-IEEE data path features supported:

Bridging is supported, as specified in the IEEE 802.17b spatially aware sublayer amendment.

Shortest path forwarding through topology discovery is supported.

Addressing is supported, including unicast, multicast, and simple broadcast data transfers.

Bidirectional multicast frames flood around the ring using both east and west ringlets.

The time to live (TTL) of the multicast frames is set to the equidistant span in a closed ring and the failed span in an open ring.

RPR-IEEE service qualities supported:

Per-service-quality flow-control protocols regulate traffic introduced by clients.

Class A allocated or guaranteed bandwidth has low circumference-independent jitter.

Class B allocated or guaranteed bandwidth has bounded circumference-dependent jitter. This class allows for transmissions of excess information rate (EIR) bandwidths (with class C properties).

Class C provides best-effort services.

RPR-IEEE design strategies increase effective bandwidths beyond those of a broadcast ring:

Clockwise and counterclockwise transmissions can be concurrent.

Bandwidths can be reallocated on nonoverlapping segments.

Bandwidth reclamation. Unused bandwidths can be reclaimed by opportunistic services.

Spatial bandwidth reuse. Opportunistic bandwidths are reused on nonoverlapping segments.

Temporal bandwidth reuse. Unused opportunistic bandwidth can be consumed by others.

RPR-IEEE fairness features ensure proper partitioning of opportunistic traffic:

Weighted fairness allows a weighted fair access to available ring capacity.

Aggressive fairness is supported.

Single Choke Fairness Supports generation, termination, and processing of Single Choke Fairness frames on both spans.

RPR-IEEE plug-and-play automatic topology discovery and advertisement of station capabilities allow systems to become operational without manual intervention.

RPR-IEEE multiple features support robust frame transmissions:

Service restoration time is less than 60 milliseconds after a station or link failure.

Queue and shaper specifications avoid frame loss in normal operation.

Fully distributed control architecture eliminates single points of failure.

Operations, administration, and maintenance support service provider environments.

RPR-IEEE non-supported features:

EoMPLS is not supported.

IP forwarding is not supported.

Wrapping, the optional IEEE 802.17b protection scheme, is not supported. Steering, the protection scheme mandated by the standard, is supported.

Layer 3 routing is not supported.

Cisco Proprietary RPR:

Ethernet frame check sequence (FCS) preservation for customers

Cyclic redundancy check (CRC) error alarm generation

FCS detection and threshold configuration

Shortest path determination

Keep alives

Fast EtherChannel (FEC) features (ML100T-12):

Bundling of up to four Fast Ethernet ports

Load sharing based on source and destination IP addresses of unicast packets

Load sharing for bridge traffic based on MAC addresses


IEEE 802.1Q trunking

Up to 6 active FEC port channels

Gigabit EtherChannel (GEC) features (ML1000-2):

Bundling the two Gigabit Ethernet ports

Load sharing for bridge traffic based on MAC addresses


IEEE 802.1Q trunking

Auto-negotiation with Remote Fault Indication (RFI)

POS channel:

Bundling the two POS ports

LEX encapsulation only


IEEE 802.1Q trunking

Layer 3 routing, switching, and forwarding:

Default routes

IP unicast and multicast forwarding

Simple IP access control lists (ACLs) (both Layer 2 and Layer 3 forwarding path)

Extended IP ACLs in software (control-plane only)

IP and IP multicast routing and switching between Ethernet ports

Reverse Path Forwarding (RPF) multicast (not RPF unicast)

Load balancing among equal cost paths based on source and destination IP addresses

Up to 18,000 IP routes

Up to 20,000 IP host entries

Up to 40 IP multicast groups

IRB routing mode support

Supported routing protocols:

Virtual Private Network (VPN) Routing and Forwarding Lite (VRF Lite)

Intermediate System-to-Intermediate System (IS-IS) Protocol

Routing Information Protocol (RIP and RIP II)

Enhanced Interior Gateway Routing Protocol (EIGRP)

Open Shortest Path First (OSPF) Protocol

Protocol Independent Multicast (PIM)—Sparse, sparse-dense, and dense modes

Secondary addressing

Static routes

Local proxy ARP

Border Gateway Protocol (BGP)

Classless interdomain routing (CIDR)

Quality of service (QoS) features:

Multicast priority queuing classes

Service level agreements (SLAs) with 1-Mbps granularity

Input policing

Guaranteed bandwidth (weighted round-robin [WDRR] plus strict priority scheduling)

Low latency queuing support for unicast Voice-over-IP (VoIP)

Class of service (CoS) based on Layer 2 priority, VLAN ID, Layer 3 Type of Service/DiffServ Code Point (TOS/DSCP), and port

CoS-based packet statistics

Security features:

Cisco IOS login enhancements

Secure Shell connection (SSH Version 2)

Disabled console port

Authentication, Authorization, and Accounting/Remote Authentication Dial-In User Service (AAA/RADIUS) stand alone mode

AAA/RADIUS relay mode

Additional protocols:

Cisco Discovery Protocol (CDP) support on Ethernet ports

Dynamic Host Configuration Protocol (DHCP) relay

Hot Standby Router Protocol (HSRP) over 10/100 Ethernet, Gigabit Ethernet, FEC, GEC, and Bridge Group Virtual Interface (BVI)

Internet Control Message Protocol (ICMP)

Management features:

Cisco IOS



Remote monitoring (RMON)

Simple Network Management Protocol (SNMP)


Simultaneous performance monitoring (PM) counter clearing in Cisco IOS, CTC, and TL1

System features:

Automatic field programmable gate array (FPGA) Upgrade

Network Equipment Building Systems 3 (NEBS3) compliant

Multiple microcode images

CTC features:

Framing Mode Provisioning

Standard STS/STM and VCAT circuit provisioning for POS virtual ports

SONET/SDH alarm reporting for path alarms and other ML-Series card specific alarms, including RPR-WRAP

Raw port statistics

Standard inventory and card management functions

J1 path trace

Cisco IOS CLI Telnet sessions from CTC

Cisco IOS startup configuration file management from CTC