Specifications

114 Chapter 5. Configuring Software Options
Chapter 5. ConÞguring Software Options
The features described in this chapter can be purchased as software option keys. To determine which software
options are installed on your router, use the vers command. (If a feature has not been enabled, it is listed with a ~
prefix.)
¥ Encryption
¥ IP filtering
¥ L2TP tunneling
¥ IPSec (Internet Protocol Security) and IKE (Internet Key Exchange)
¥ 3DES encryption
Software Option Keys
The router has several optional software features that can be purchased as software option keys when ordering the
router. These optional features are:
¥ IP routing
¥ DES or 3DES encryption (see Encryption, page 116)
¥ IP filters (see IP Filtering, page 119)
¥ L2TP tunneling (see L2TP Tunneling Ñ Virtual Dial-Up, page 122)
¥ IPSec (see IPSec (Internet Protocol Security), page 134)
These options are usually ordered with the router. The options are controlled by the presence of a key file in flash
memory or a bit set in the CMOS. Both values are checked; if either is set, the option is enabled.
Listing the Installed Software Options
To determine which software options are installed in your router, use the vers command. The vers command lists
all options:
¥ Options that are disabled are shown with a ~ prefix.
¥ Options that are enabled by the key file have a + prefix.
¥ Options that are enabled by a set bit have no prefix.
For example, the following vers command output shows that the L2TP and encryption options are disabled, but
all the other options are enabled. The IP Routing feature was enabled by a key.
Options: FRAME RELAY, SDSL, RFC1490, +IP ROUTING, IP FILTERING, WEB, ~L2TP,
~ENCRYPT, BRIDGE, IPX, CMMGMT