ONS 15454 E-Series Interface Cards


Cisco ONS 15454 E-Series Ethernet interface cards integrate a Layer 2 switch into the SONET/SDH platform, enabling multipoint Ethernet service delivery within the optical transport network. Additionally, through the use of the E Series "port-mapped" mode, point-to-point Ethernet services can be provisioned.

The two cards included in the E Series, the E100T-12/E100T-G and the E1000-2/E1000-2-G cards, were the initial Ethernet interface cards introduced with the ONS 15454 platform. (The E100T-G and E1000-2-G are later versions, with the additional capability of functioning with XC10G-equipped systems.) Although these cards are based on solid technologies, the later generations of Ethernet interfaces provide capabilities that the E-Series cards do not. For example, the CE Series and G Series provide for more efficient ways of delivering point-to-point services, while the ML-Series cards deliver a much richer feature set for multipoint services than the E-Series cards. For this reason, E-Series cards are most often found in existing networks and are typically not chosen for new network builds. The E-Series cards are covered only briefly in this chapter; you can find additional information in the Cisco ONS 15454 User Documentation, available at Cisco.com.

Table 7-1 provides a summary of the cards included in the E Series. Both 10-/100-Mbps Ethernet/Fast Ethernet and 1000-Mbps GigE versions of the E Series are available.

Table 7-1. E-Series Ethernet Card Interface Characteristics

E-Series Card

Number of User-Side Interfaces

Cross-Connect Card Compatibility

Supported Ethernet Interface Media Types

Port Bandwidth

Interface Connector Types

Port Lamps

E1000-2

2

XCVT

1000BASE-SX

1000BASE-LX

1000 Mbps

GBIC (SX or LX)

ACT/LINK

E1000-2-G

2

All

1000BASE-SX

1000BASE-LX

1000 Mbps

GBIC (SX or LX)

ACT/LINK

E100T-12

12

XCVT

10/100BASE-TX

10 Mbps

100 Mbps

RJ-45

ACT/LINK

E100T-G

12

All

10/100BASE-TX

10 Mbps

100 Mbps

RJ-45

ACT/LINK


ONS 15454 E-Series Card Modes and Circuit Sizes

E-Series cards can be placed in any of the ONS 15454 traffic card slots (16 and 1217), and can operate in three different modes: single-card EtherSwitch, multicard EtherSwitch, and port-mapped mode. These modes are briefly described as follows:

  • Single-card EtherSwitch In this mode, each E-Series card in the ONS 15454 chassis acts as an independent Ethernet switching entity.

  • Multicard EtherSwitch In multicard mode, two or more E-Series cards act as a single Layer 2 Ethernet switch.

  • Port-mapped In port-mapped mode, the E-Series card Layer 2 features are disabled, and individual ports on the E-Series cards terminate point-to-point circuits for Layer 1 Ethernet frame transport.

Table 7-2 lists the circuit sizes that can be used to link E-Series cards for each mode.

Table 7-2. ONS 15454 SONET/SDH Circuit Sizes for E-Series Cards

ONS 15454 SONET E-Series Port-Mapped and Single-Card EtherSwitch Modes

ONS 15454 SONET E-Series Multicard EtherSwitch Mode

ONS 15454 SDH E-Series Port-Mapped and Single-Card EtherSwitch Modes

ONS 15454 SDH E-Series Multicard EtherSwitch Mode

STS-1

STS-1

VC4

VC4

STS-3c

STS-3c

VC4-2c

VC4-2c

STS-6c

STS-6c

VC4-4c

STS-12c


Note

GigE transport with the E-Series GigE cards is limited to 600 Mbps because Synchronous Transport Signal (STS)-12c is the maximum bandwidth that can be terminated to the card. In addition, 10-Mbps Ethernet service requires a minimum circuit size of STS-1 (approximately 50 Mbps), and 100-Mbps Fast Ethernet service requires a minimum circuit size of STS-3c (150 Mbps).


ONS 15454 E-Series Example Application and Provisioning

E-Series Ethernet circuits can be used to link E-Series cards in multiple ONS 15454 nodes in point-to-point (private line), hub-and-spoke, or shared packet ring (SPR) configurations. If a connection is needed between only two nodes, a point-to-point connection is typically used. If connectivity is needed among more than two sites, the hub-and-spoke or SPR topology can be used. Figure 7-1 shows an example of a network that uses the shared packet ring configuration. The ring will pass through E-Series cards in the four nodes (A, B, C, and D) on an OC-12 unidirectional path-switched ring (UPSR). In UPSR shared packet ring configurations, Layer 1 SONET protection is not used (Spanning Tree Protocol [STP] only).

Figure 7-1. E-Series Ethernet Interface Card Shared Packet Ring Network Example


To illustrate an example application of the E-Series cards in an ONS 15454 MSPP network, consider this high-level overview of the steps in setting up a SPR:

Step 1.

Verify that the Ethernet cards that will be in the SPR are provisioned for Multicard EtherSwitch mode.

Step 2.

Provision the E-Series Ethernet ports. This can include assigning port names, performing autonegotiation and duplex, enabling the ports, assigning port queuing priorities, and enabling STP.

Step 3.

Provision the E-Series ports for membership in one or more VLANs.

Step 4.

Create the SPR Ethernet circuit. This circuit can be an STS-1, STS-3c, or STS-6c. For the circuit source and destination, select Ethergroup as the slot for the endpoint nodes. You can assign an existing virtual local-area network (VLAN) to the circuit or create a new VLAN.

Step 5.

Manually route the SPR circuit through every node in the ring.




Building Multiservice Transport Networks
Building Multiservice Transport Networks
ISBN: 1587052202
EAN: 2147483647
Year: 2004
Pages: 140

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