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2-3
Integrated Services Adapter and Integrated Services Module Installation and Configuration
OL-3575-01 B0
Chapter 2 Preparing for Installation
Safety Guidelines
• If ISA and VAM are in the chassis at system bootup, and the encryption mppe command is in the
router’s running configuration, then both ISA and VAM are enabled at system bootup. The ISA card
supports MPPE, and the VAM supports ISAKMP/IPSec. You can enable encryption mppe by
following the steps in “Configuring IPSec” section on page 4-4. To disable MPPE on an ISA card,
use the no encryption mppe command. This disables the ISA.
• To disable a card, use the no crypto engine accelerator type slot/port (port-adapter-slot-number/
interface-port-number) command.
Safety Guidelines
This section provides safety guidelines that you should follow when working with any equipment that
connects to electrical power or telephone wiring.
Safety Warnings
Safety warnings appear throughout this publication in procedures that, if performed incorrectly, might
harm you. A warning symbol precedes each warning statement.
Table 2-2 Interoperability Between ISA and VAM
ISA and ISA ISA with VAM
• Supports MPPE • Supports MPPE
• Supports ISAKMP/IPSec • Supports ISAKMP/IPSec
• If two ISAs are enabled in the chassis at
power up, then both modules support both
MPPE and ISAKMP/IPSec.
• If ISA and VAM are enabled in the chassis at
power up, ISA is used for MPPE, and VAM is
used for ISAKMP/IPSec, provided the
router’s running configuration includes the
encryption mppe command.
• If ISA is enabled in the chassis at bootup, and
another ISA is added later, the second ISA
immediately becomes active and depending
on the configuration, the system attempts to
load-balance between the two ISAs.
• If ISA is enabled in the chassis at bootup, and
VAM is added later, the VAM remains
inactive until the next reboot, or until the
configuration is changed to enable the VAM.