Cisco Wide Area Application Engine 612 Manual de usuario descargar pdf (Pagina 35)

Interception Techniques and Protocols 109

Content Switching

Content switching is the ﬁnal interception mechanism discussed in this chapter. Content

switches have traditionally provided load-balancing services for servers, ﬁrewalls, and

content caches. Within the context of WAAS, content switching provides dedicated

hardware for intercepting and load balancing connections across a farm of WAEs. Using

content switches for transparent interception with WAAS is useful for large data center

deployments, complex topologies, and integration with other advanced features such as

application protocol optimization and SSL-ofﬂoad. In addition, customers with existing

content switching deployments can leverage their experience and investments in content

switches for transparent interception with WAAS. The Application Control Engine is the

Cisco content switch that will be discussed in this section. Deployment and conﬁguration

examples for integrating ACE with Cisco WAAS are provided in Chapter 6.

Application Control Engine

The Cisco Application Control Engine (ACE) module is a service module for the Cisco

Catalyst 6500 series switches and Catalyst 7600 series routers. ACE provides intelligent

load balancing and security services for enterprise applications and network devices. ACE

can be used in a large-scale data center environment to transparently intercept and load

balance connections for WAAS. The following are some of the key performance

characteristics of Cisco ACE:

• Up to 16 Gbps of throughput and 345,000 connections per second per module

• Up to 4 million concurrent connections

Table 4-4 WAE Inline Module Cabling Guidelines

Connection Required Cable

Switch to switch (no WAE) Crossover

Switch to router (no WAE) Straight-through

Router to router (no WAE) Crossover

Switch to WAE Straight-through

WAE to switch Crossover

Switch to WAE Straight-through

WAE to switch Straight-through

Router to WAE Straight-through

WAE to router Straight-through

WAE to WAE Crossover

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Cisco Wide Area Application Engine 612 Manual de usuario Pagina 35