Cisco CATALYST MEM-C6K-FLC16M Bedienungsanleitung PDF herunterladen (Seite 2)

Introducing the Catalyst 4840G SLB Switch

The Catalyst 4840G is a ﬁxed-conﬁguration SLB switch with 40

RJ-45 10/100 ports and two Gigabit Ethernet uplink ports

utilizing modular GBIC interfaces. The switch is ideal for

deployment in ISP, and enterprise sites that require wire-speed

ﬁrewall load balancing (FWLB) or integrated SLB. The 4840G

SLB switch provides a compact solution for designs that do not

require the high port densities offered by the Catalyst 6000 family

of switches. With the Catalyst 4840, Catalyst 6000, CSS 11000

and the LocalDirector appliance, Cisco offers a complete line of

SLB products to meet the requirements of the smallest enterprise

to the largest ISP.

Catalyst 4840G Overview

The Catalyst 4840G delivers the highest performance and port

density in the smallest space. With only a 2-RU (1.75 inches high)

chassis, the 4840G provides 40 10/100 ports and two-gigabit

Ethernet ports. It is capable of switching trafﬁc simultaneously

through all ports at wire speed. The architecture consists of a

22-Gpbs non-blocking switch fabric, multiple high-performance

Reduced Instruction Set Computer (RISC) processors for routing

intelligence and advanced software features, and dedicated

per-port ASICs for wire-speed performance.

The Catalyst 4840G is housed in a 2RU chassis and can be

provisioned with an optional external redundant power supply. It

supports a 22-Gbps shared-memory, fully non-blocking switch

fabric, high-performance RISC processor that provides the SLB

and routing intelligence, and individual port-based ASICs for

wire-speed switching. The switch fabric is capable of supporting all

40 10/100 ports and two-gigabit uplinks simultaneously at wire

speed. The Catalyst 4840G provides an aggregate throughput of

more than 9 million packets per second (pps) for SLB and L-3

switching. While supporting a rich set of SLB algorithms and

features with all the common L-3 routing protocols, the Catalyst

4840 also supports both dispatch and directed SLB modes at wire

–speed, making it a truly flexible Web-hosting switch.

Catalyst 4840G Highlights: SLB at Millions of Packets

per Second

The Catalyst 4840G provides a complete SLB solution without

sacriﬁcing any of the services that are required to build a scalable

network. The Catalyst 4840G is a feature-rich switch with a full

Cisco IOS SLB implementation that allows network managers to

continue to administer and manage their networks as they do

today while scaling their server backbone to gigabit speeds. The

Catalyst 4840G supports all the major SLB algorithms/feature

sets used in Web sites today as well as all the major routing

protocols. These include:

FWLB/SLB Features

• Transparent Firewall support

• IP Addessable Firewall Support (PIX, Checkpoint)

• Least Connections

• Weighted Least Connections

• Round Robin

• Weighted Round Robin

High Availability Features

• Dynamic Feedback Protocol

• SLB Stateless Redundancy over HSRP

• SLB Stateful Redundancy (both over Ethernet)

• HTTP probes

• Firewall probes

Additional SLB features supported by the Catalyst 4840G SLB

switch include Port Bound Servers, Client Assigned Servers,

Sticky Connections, Buddy Virtuals, Maximum Connections,

Delayed Removal, Automatic Server Failure Detection, Auto

Unfail, Slow Start, and SynGuard. In the future, additional

features will be added to the Catalyst 4840 via simple Cisco IOS

software upgrades.

L-3 Switching Features

• Interior Gateway Routing Protocol (IGRP)

• Enhanced IGRP (EIGRP)

• Open Shortest Path First (OSPF)

• Routing Information Protocol (RIP) Versions 1 and 2

• Static routes and Route Redistribution

In addition to these L-3 switching features, the Catalyst 4840G

supports all the additional protocols necessary to build scalable,

reliable networks. These include but are not limited to the

Network Time Protocol (NTP), Internet Group Management

Protocol (IGMP) 1 and 2, Dynamic Host Conﬁguration Protocol

(DHCP) Relay, Cisco Group Management Protocol (CGMP),

Internet Control Message Protocol (ICMP), Gateway Discovery

Protocol (GDP), ICMP Router Discovery Protocol (IRDP), and

Bootstrap Protocol (BOOTP) Relay.

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