IBM B48Y Manuel utilisateur

IBM Ethernet Switch B48Y 1

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IBM Ethernet Switch B48Y

IBM System x at-a-glance guide

The IBM Ethernet Switch B48Y is a high-performance, feature-rich, easy-to-manage 1 GbE solution for

network device access. Purpose-built for the data center with a wire-speed, non-blocking architecture,

high-availability features including optional redundant and hot-swappable power supplies and fans, and

rack-friendly airflow, the B48Y enables organizations to scale easily in virtualized and non-virtualized data

center environments.

The switch comes fully featured with Layer 2 and Layer 3 capabilities, giving organizations ultimate

flexibility in deployment options. With the optional 4-port 10 GbE interface module, a row of up to eight

switches can be unified into a single logical chassis with 384 ports using IronStack technology, greatly

simplifying management and increasing virtual machine mobility.

The switch runs a feature-rich and mature IronWare operating system with an industry-standard

command-line interface (CLI), minimizing re-training and operational costs. Supporting a full range of RFC

and IEEE standards for interoperability, along with compatibility for vendor-specific protocols such as

Cisco Discovery Protocol (CDP) and Per-VLAN Rapid Spanning Tree Plus (PVRST+), the B48Y

integrates seamlessly into existing network infrastructures.

Figure 1. IBM Ethernet Switch B48Y with optional 4-port 10 GbE SFP+ interface module (front view)

Figure 2. IBM Ethernet Switch B48Y (back view)

Did you know

As server utilization increases due to virtualization on more powerful hardware such as the IBM innovative

eX5 architecture, so does the average and burst bandwidth utilization on the switches in the network. To

alleviate these performance bottlenecks, the B48Y is capable of supporting four 10 GbE uplinks, double

the bandwidth of most standard 1 GbE switches, to enable near 1:1 subscription during periods of heavy

traffic flows with extremely low port-to-port latencies. Even with its outstanding performance, the B48Y is

highly power efficient, using up to 36% less power than competing switches.

IBM Ethernet Switch B48Y 2

To ease manageability, up to eight switches can be stacked together to create a single logical chassis of

384 ports. All switches in the same stack share a single configuration file, IP address, and interface

addressing scheme. This solution can be a cost-effective alternative to a design using an end-of-row,

modular chassis. The IBM B48Y is complemented by a full Ethernet and IP product portfolio, allowing an

organization to standardize on a network infrastructure running on the proven IronWare operating system.

Part number information

Table 1 lists the orderable part numbers for the B48Y and associated options through System x.

Table 1. IBM part numbers and feature codes for ordering

Description IBM part number IBM feature code

IBM Ethernet Switch B48Y 0563-022 0563-HCF

4-port 10 GbE Interface Module (SFP+) (enables stacking) 81Y1455 6687

210 W AC Power Supply (for 1+1 redundancy) 81Y1451 6685

10 GbE 300 m, SFP+, 10GBASE-SR (duplex LC, MMF, 850

nm, OM) 69Y0389 6416

The IBM Ethernet Switch B48Y (0563-022/0563-HCF) ships with the following:

One IBM Ethernet Switch B48Y, which includes:

Fourty-eight 10/100/1000 MbE RJ-45 ports

One open interface module slot for an optional 4-port 10 GbE (SFP+) module

One out-of-band 10/100/1000 MbE RJ-45 management port

One DB9 male serial console port

One hot-swappable quad-fan fan tray

One (of two) 210 W AC hot-swappable power supplys

One 1.5 m DB9 female-to-DB9 female straight-through serial console cable

Rack mount brackets for mounting into an EIA-310D compliant rack

IBM Ethernet Switch y-series Installation and User Guide

Statement of limited warranty

Brocade end user license agreement

Safety and regulatory notices

CD-ROM with manuals and environmental notices

Note: Qualified SFP+ transceivers are required for each SFP+ port on the optional module and are not

included.

IBM Ethernet Switch B48Y 3

Power cords are not included and must be specified at the time of order. The B48Y has a C14 inlet to

receive a C13 power plug. Table 2 lists the available power cable options.

Table 2. Power cord options

Description IBM part number

Line cord – 2.8 m, 10A/230V, C13 to CEE7-VII (Europe) 39Y7917

Line cord – 2.8 m, 10A/250V, C13 to DK2-5a (Denmark) 39Y7918

Line cord – 2.8 m, 10A/250V, C13 to SEV 1011-S24507 (Swiss) 39Y7919

Line cord – 2.8 m, 10A/250V, C13 to SI 32 (Israel) 39Y7920

Line cord – 2.8 m, 10A/250V, C13 to SABS 164 (S. Africa) 39Y7922

Line cord – 2.8 m, 10A/250V, C13 to BS 1363/A (UK) 39Y7923

Line cord – 2.8 m, 10A/250V, C13 to AS/NZ 3112 (Australia/NZ) 39Y7924

Line cord – 2.8 m, 220-240V, C13 to KETI (S. Korea) 39Y7925

Line cord – 2.8 m, 10A/250V, C13 to (2P+Gnd) (India) 39Y7927

Line cord – 2.8 m, 220-240V, C13 to GB 2099.1 (China) 39Y7928

Line cord – 2.8 m, 125V, C13 to NBR 6147 (Brazil) 39Y7929

Line cord – 2.8 m, 10A/250V, C13 to IRAM 2073 (Australia) 39Y7930

Line cord – 4.3 m, 10A/125V, C13 to NEMA 5-15P (US) 39Y7931

Line cord – 4.3 m, 10A/100-250V, C13 to IEC 320-C14 39Y7932

Line cord – 1.5 m, 10A/100-250V, C13 to IEC 320-C14 39Y7937

Each SFP+ optical transceiver, such as the 10GBASE-SR SFP+, requires fiber optic cabling with duplex

LC connectors to connect to another optical transceiver. See the “Network cabling requirements” section

for additional details.

Each 10/100/1000 MbE RJ-45 port requires copper CAT 5e or higher cabling for connectivity. Table 3 lists

the available copper cable options.

Table 3. Ethernet copper cable (RJ-45) options

Description IBM part number

0.6 m Ethernet cable (blue) 40K5679

1.5 m Ethernet cable (blue) 40K8785

3 m Ethernet cable (blue) 40K5581

10 m Ethernet cable (blue) 40K8927

25 m Ethernet cable (blue) 40K8930

IBM Ethernet Switch B48Y 4

Table 4 lists the orderable part numbers for additional options available through IBM System Networking

HVEC channels.

Table 4. IBM part numbers and feature codes for ordering (System Networking HVEC)

Description IBM part number IBM feature code

4-port 100/1000 MbE Interface Module (SFP, works as

combination ports) 45W5943 1002

10 GbE 10 km, SFP+, 10GBASE-LR (duplex LC, SMF, 1310

nm, OM) 45W4264 2131

10 GbE Direct Attach SFP+, 1 m, Active TwinAx copper

cable 45W2398 2711

10 GbE Direct Attach SFP+, 3 m, Active TwinAx copper

cable 45W2408 2731

10 GbE Direct Attach SFP+, 5 m, Active TwinAx copper

cable 45W3039 2751

1 GbE 550 m SFP, 1000BASE-SX (duplex LC, MMF, 850

nm, OM) 45W2815 2211

1 GbE 10 km SFP, 1000BASE-LX (duplex LC, SMF, 1310

nm, OM) 45W2816 2212

1 GbE 70 km SFP, 1000BASE-LHA (duplex LC, SMF, 1550

nm, OM) 45W2817 2213

100 MbE 2 km SFP, 100BASE-FX (duplex LC, MMF, 1310

nm, OM) 45W2817 2216

100 MbE 40 km SFP, 100BASE-FX-LR (duplex LC, SMF,

1310 nm, OM) 45W7552 2218

Note: OM = optical monitoring supported. SMF = single-mode fiber. MMF = multi-mode fiber. The MMF

distance supported depends on the cabling type. Use OM3 50

m (2000 MHz*km) MMF to support the

farthest distances.

No transceivers are required unless an optional interface module is ordered.

The optional 4-port 10 GbE SFP+ Interface Module (81Y1455) requires 10 GbE SFP+ transceivers for

connectivity. While these higher-bandwidth ports are typically used for uplinks to an Aggregation or Core

switch, they can also be connected to end devices such as servers. IronStack is supported over two of

these 10 Gbps ports. Cee the “IronStack technology” section for additional details.

Note: The default configuration on the switch sets the first two ports on the optional 4-port 10 GbE SFP+

Interface Module as stack ports. To use all ports on the switch as regular Ethernet ports, the global CLI

command stack disable can be configured to disable stacking. See the

FastIron Configuration Guide

for

additional configuration details.

IBM Ethernet Switch B48Y 5

10 GbE SFP+ optical –SR (10GBASE-SR) transceivers support distances up to 300 m, ideal for

connectivity within a data center. 10 GbE SFP+ optical –LR (10GBASE-LR) transceivers support extended

distances up to 10 km.

Figure 3. SFP+/SFP optical transceiver, receives duplex LC connectors

For cost-effective server connectivity within a rack, 10 GbE copper direct-attach SFP+ active TwinAx

cables are available. These cables have two 10 GbE SFP+ transceivers attached on either end of the

cable and have been tested for compatibility with the Brocade 10Gb CNA, QLogic 10Gb CNA, and

Emulex 10Gb Virtual Fabric Adapter for IBM System x. Compatibility with other 10 GbE server adapters

and network devices is up to the user to determine.

Figure 4. 10 GbE Direct Attach SFP+ TwinAx Cable

IBM Ethernet Switch B48Y 6

IronStack technology

Table 5 lists several technology options available for the access layer of the network.

Table 5. Technology options available for the access layer of the network

Fixed port switches

Pros: low acquisition costs

Cons: switches need to be

managed individually

Fi xed port, stackable switches

Pros: flexible, pay as you

go, cost-effective

management

Cons: performance

compared with modular

chassis

Modular switch chassis

Pros: high performance,

port density, availability

Cons: initial acquisition

cost, price per port

Organizations need a flexible network architecture that can be reconfigured easily as they grow, while

keeping management complexity down. Stacking allows multiple, discrete switches to be aggregated into

a single logical device, simplifying deployment and ongoing management. Fixed port, stackable switches

provide chassis-like operations such as single IP management, cross-switch link aggregation, local

switching of data within a stack, and port mirroring at near the economies of fixed port switches.

IronStack technology found on the IBM Ethernet Switch B48Y and matured over several product

generations provides such capabilities along with resilient operations including automatic switch failover,

hot switch insertion and removal, and automatic detection of shortest path when the network changes.

IBM Ethernet Switch B48Y 7

The optional 4-port 10 GbE SFP+ Interface Module (81Y1455) is required to build a stack. No additional

licenses are required. Stacking can be done over one or two of the 10 Gbps ports on the switch, providing

20 Gbps of bandwidth between stack members. The remaining two or three 10 Gbps ports can be used to

carry regular data traffic. Stacking is supported in both ring and linear topologies (Figure 5).

Figure 5. IronStack technology found on the B48Y enables a logical chassis of up to 384 ports

Consider using a ring or closed-loop topology to ensure un-interrupted stack operation in the event of a

switch or link failure. Within the stack is an Active Controller, which handles stack management and

configures all system and interface-level features, and a Standby Controller, which takes over if the Active

Controller fails. Feature configuration in a stacked setup similar to a chassis whereby interfaces are

identified in a <stack unit #>/<port region>/<port number> manner.

Regular 10GBASE-SR transceivers (69Y0389) and multi-mode fiber cable can be used to connect two

stack members over distances of up to 300 meters. This enables splitting a stack across multiple rooms

or floors for flexibility. In stacks of more than two switches, the distance between the other stacked units

can be up to 100 meters, allowing for a total ringed cable loop of 1,000 meters between eight stacked

units, ideal for most stack deployments.

More common within the data center is stacking across a row of servers, which can be done using

lower-cost SFP+ TwinAx cables (Table 4) if the switches are less than 5 meters apart. To stay within the

cabling distances of these Direct Attach Cables, a cabling method such as that illustrated in Figure 6 can

be used.

Figure 6. Using IronStack to unify the network layer across a row of servers into a single logical device

IBM Ethernet Switch B48Y 8

Any standards-based network device can connect to the switch stack. To these network devices, the

multiple discrete switches in a stack look like a single switch. Network devices can utilize

standards-based 802.3ad Link Aggregation Control Protocol (LACP) or static link aggregation connected

across multiple switch stack members to support multi-device hardware redundancy. No special setup is

required.

You can also support multi-device hardware redundancy within a rack using IronStack between the two

access switches in the same rack. This allows servers to connect to the two access switches in an

active-active configuration using standards-based link aggregation protocols, maximizing bandwidth while

also simplifying configuration. Figure 7 illustrates this topology.

Figure 7. Using IronStack within the rack enables multi-device redundancy while increasing bandwidth

utilization

Features and benefits

Features and benefits are:

Comprehensive standards support: Supporting a wide range of open IEEE and RFC standards, the

B48Y is fully interoperable with existing network environments. In addition, the B48Y supports

vendor-specific protocols such as Cisco Discovery Protocol (CDP), native support for Per-VLAN

Rapid Spanning Tree Plus (PVRST+), and static trunks to EtherChannel for further supportability.

IronStack technology: IronStack enables multiple discrete switches to be unified together into a single

logical chassis, enabling multi-device hardware redundancy, speeding up infrastructure rollouts, and

simplifying management operations. Unifying the access layer can reduce the need for spanning tree

protocol, which increases bandwidth utilization and helps flatten the network.

Double the uplink bandwidth: Supports up to four 10 Gbps uplinks, double the uplink bandwidth of

common 1 Gbps switches. With full-line rate traffic on all ports, 1:1 internal subscription, and up to

176 Gbps of internal forwarding performance, the B48Y ensures that your network devices have the

bandwidth that they require.

Built for the data center: The B48Y features back-to-front airflow, allowing installation into racks with a

hot-cold aisle design without the need for complicated air baffles. All ports are found on the front side

of the switch for easy serviceability.

Fully featured L2/L3 switch: Dynamic Layer 3 routing, advanced Layer 2 features such as Q-in-Q,

protected links, and advanced quality of service (QoS) are all included in the base, eliminating

complicated licensing schemes.

IBM Ethernet Switch B48Y 9

High availability: Hot-swappable and redundant power supplies and fan trays reduce downtime and

allow you to meet your service level agreements by increasing switch availability.

Best-in-class power efficiency: At only 112 W, the low power consumption reduces operational costs

tied to power and cooling and allows data centers running out of power to deploy more assets.

Industry-standard CLI: Minimize re-training and personnel costs while increasing operational

efficiencies by utilizing a management interface that the network team is already familiar with.

Mature operating system: The feature-rich and time-tested IronWare operating system running on the

B48Y and all IBM b-type system networking devices provide a consistent experience across the

network.

Granular network visibility: Hardware-based sFlow v5 provides packet sampling for analysis, trending,

and application of automated policies based on thresholds using industry applications such as

Brocade Ironview Network Manager.

Cost competitive: The B48Y includes all software capabilities and a 3-year warranty on the base

product, simplifying ordering while being priced extremely competitively compared with other vendors.

Specifications

The IBM Ethernet Switch B48Y supports the following when running IronWare R07.2.x and later (code

download and documentation can be found on the IBM Systems support site in the Related links section):

Form-factor

One RU; 44.0 cm (17.3 in.) width x 4.4 cm (1.7 in.) height x 43.5 cm (17.2 in.) depth

Rack-mount into 19” EIA-310D compliant rack, Telco rack, or table-top

Ports (data)

Forty-eight 10/100/1000 MbE RJ-45 ports with auto-MDI/MDIX detection and auto-negotiation

One open interface module slot

Interface module options

4-port 10 GbE SFP+ interface module (81Y1455)

Ports (management, out-of-band)

One 10/100/1000 MbE RJ-45 port

One DB9 male serial console port

Power supplies, fans, and airflow

Two 210 W AC hot-swappable power supplies supported for 1+1 redundancy (base switch

comes with 1)

One hot-swappable fan tray with four 3+1 redundant fans

Back-to-front airflow supports data center hot-cold aisle deployments

Performance

176 Gbps line speed full-duplex throughput

132 Mpps forwarding capacity

Jumbo frames

Supported, up to 10,232-byte Ethernet frame sizes

Media (transceivers)

On 4-port 10 GbE SFP+ module (81Y1455)

10 GbE SFP+ -SR transceivers and Direct Attach copper TwinAx cables available

IBM Ethernet Switch B48Y 10

VLANs

Up to 4096 maximum VLANs

802.1Q tagging

802.1Q-in-Q tagging

Dual-mode VLANs (tagged and untagged traffic across same port)

Port-based, protocol-based (AppleTalk, IPv4, IPv6, and IPX), and subnet-based VLANs

GARP VLAN Registration Protocol (GVRP) for distributed VLAN configuration

VLAN groups

Private VLANs

Link aggregation

Up to eight links per group, 32 link groups per switch

Static trunks compatible with Cisco EtherChannel

802.3ad Link Aggregation Control Protocol (LACP) for dynamic trunk groups

Cross-device link aggregation for switches in the same stack

Quality of service and rate shaping

Eight queues per port with strict priority (SP), weighted round robin (WRR), and combined

SP/WRR schedulers

802.1p class of service (CoS)

IP DSCP/DiffServ (type of service) to priority mapping

ACL, port, and static MAC address to priority mapping

Layer 2 CoS and Layer 3 DSCP re-marking

Fixed and adaptive inbound rate limiting

Outbound rate shaping

Symmetric flow control supports 802.1x transmission and receipt of 802.1x PAUSE frames

Layer 2

Up to 32,000 MAC addresses.

Per-VLAN Rapid Spanning Tree Protocol Plus (PVST/PVST+/PVRST+) compatibility in

default configuration supports smooth implementation into Cisco Layer 2 environments.

802.1d Spanning Tree Protocol (STP).

802.1w Rapid Spanning Tree Protocol (RSTP).

802.1s Multiple Spanning Tree Protocol (MSTP) enables multiple STP instances and

forwarding paths for more efficient traffic distribution.

Virtual Switch Redundancy Protocol (VSRP) is an alternative to STP and includes

sub-second convergence and Layer 2 redundancy based on the VRRPE protocol.

Metro Ring Protocol (MRP) v1/v2 enables fast, sub-second convergence in ring topologies.

IGMPv1/v2/v3, PIM-SM, and MLDv1/v2 Snooping reduces multicast flooding in a Layer 2

network.

Root Guard prevents rogue devices from hijacking STP root.

BPDU Guard prevents rogue devices from participating in STP.

DHCP Assist helps DHCP servers respond correctly to devices in a different subnet than the

DHCP server.

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