Cisco Wide Area Application Engine 612 Instrukcja Użytkownika Pobierz pdf (Strona 40)

114 Chapter 4: Network Integration and Interception

Network Integration Best Practices

The following network integration best practices are recommended for most WAAS

deployments:

• Leave the physical WAE interfaces set to auto-sense: Because it is possible that

some of your WAEs will be able to run at 1-Gbps speed, leaving all of the WAEs

deployed set to auto-sense simpliﬁes the conﬁguration and deployment. In addition,

an alarm will be raised in the Central Manager if an interface negotiates to half duplex.

• Use EtherChannel for interface redundancy when both physical WAE interfaces

connect to the same LAN switch: Improve performance by providing 2X the

available LAN bandwidth.

• Use a standby interface for interface redundancy when both physical WAE

interfaces connect to different LAN switches: Increase WAE availability in the

event of a problem with the primary interface or connected LAN switch.

• Always conﬁgure a MD5 password for WCCP service groups: Protect the integrity

of the service group members by making sure that only authorized devices can join

the service group.

• Stick to inbound WCCP redirection: Even on software-based platforms, inbound

redirection is more efﬁcient.

• On hardware-based platforms, conﬁgure WCCP using the following guidelines:

— Use L2 forwarding instead of GRE forwarding.

—Always use mask assignment.

— Only use inbound redirection.

— Do not use the ip wccp redirect exclude in command.

• Only use the GRE return EMIC on software-based platforms (i.e. ISR routers):

Hardware-based platforms process GRE return trafﬁc completely in software, which

causes serious performance issues.

• Run a recommended version of IOS for WCCP: Tables 4-5 and 4-6 list the

minimum recommended IOS versions when running WCCP with Cisco WAAS.

Table 4-5 Minimum IOS Recommendations: Software-Based Platforms

Major Version M Train T Train

12.1 12.1(14) 12.1(3)T

12.2 12.2(26) 12.2(14)T

12.3 12.3(13) 12.3(14)T5

12.4 12.4(10) 12.4(9)T1

1 2 ... 35 36 37 38 39 40 41

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Cisco Wide Area Application Engine 612 Instrukcja Użytkownika Strona 40