Crypto Map Manual Configuration Mode Commands

The Crypto Map Manual Configuration Mode is used to configure static IPSec tunnel properties.

Modification(s) to an existing crypto map manual configuration will not take effect until the related security association has been cleared. Refer to the description of the clear crypto security-association command in the Exec Mode Commands chapter for more information.

IMPORTANT:

Because manual crypto map configurations require the use of static security keys (associations), they are not as secure as crypto maps that rely on dynamically configured keys. Therefore, they only be used for testing purposes.

IMPORTANT:

The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).

end

Exits the current configuration mode and returns to the Exec mode.

Product:

All


Privilege:

Security Administrator, Administrator


Syntax 
end

Usage:

Use this command to return to the Exec mode.

exit

Exits the current mode and returns to the parent configuration mode.

Product:

All


Privilege:

Security Administrator, Administrator


Syntax 
exit

Usage:

Use this command to return to the parent configuration mode.

match address

Matches or associates the crypto map to an access control list (ACL) configured in the same context.

Platform:

ASR 5000

Product:

PDSN, HA, GGSN, PDIF


Privilege:

Security Administrator, Administrator


Syntax

[ no ] match address acl_name [ priority ]

no

Removes a previously matched ACL.

match address acl_name

Specifies the name of the ACL with which the crypto map is to be matched. acl_name is an alphanumeric string of 1 through 47 characters that is case sensitive.

priority

Specifies the preference of the ACL. The ACL preference is factored when a single packet matches the criteria of more than one ACL. priority is an integer from 0 through 4294967295. 0 is the highest priority. Default: 0

IMPORTANT:

The priorities are only compared for ACLs matched to other crypto maps or to policy ACLs (those applied to the entire context).


Usage:

ACLs matched to crypto maps are referred to as crypto ACLs. Crypto ACLs define the criteria that must be met in order for a subscriber data packet to routed over an IPSec tunnel.

Prior to routing, the system examines the properties of each subscriber data packet. If the packet properties match the criteria specified in the crypto ACL, the system will initiate the IPSec policy dictated by the crypto map.


Example:
The following command sets the crypto map ACL to the ACL named ACLlist1 and sets the crypto maps priority to the highest level.
match address ACLlist1
0
set control-dont-fragment

Controls the Don’t Fragment (DF) bit in the outer IP header of the IPSec tunnel data packet.

Platform:

ASR 5000

Product:

PDSN, HA, GGSN, PDIF


Privilege:

Security Administrator, Administrator


Syntax 
set control-dont-fragment { clear-bit | copy-bit | set-bit }

default set control-dont-fragment { clear-bit | copy-bit | set-bit }
default

Sets or restores default value assigned to a specified parameter.

set control-dont-fragmentclear-bit

Clears the DF bit from the outer IP header (sets it to 0).

set control-dont-fragmentcopy-bit

Copies the DF bit from the inner IP header to the outer IP header. This is the default action.

set control-dont-fragmentset-bit

Sets the DF bit in the outer IP header (sets it to 1).


Usage:

Use this command to clear, copy, or set the don’t fragment (DF) bit in the outer IP header of the IPSec tunnel data packet.


Example:
The following command sets the DF bit in the outer IP header.
set control-dont-fragment
set-bit
set peer

Configures the IP address of the peer security gateway that the system will establish the IPSec tunnel with.

Platform:

ASR 5000

Product:

PDSN, HA, GGSN, PDIF


Privilege:

Security Administrator, Administrator


Syntax

[ no ] set peer gw_address

no

Removes a previously configured peer address.

set peer gw_address

Specifies the IP address of the peer security gateway with which the IPSec tunnel will be established.


Usage:

Once the manual crypto map is fully configured and applied to an interface, the system will establish an IPSec tunnel with the security gateway specified by this command.

Because the tunnel relies on statically configured parameters, once created, it never expires; it exists until its configuration is deleted.


Example:
The following command configures a security gateway address of 192.168.1.100 for the crypto map with which to establish a tunnel.
set peer 192.168.1.100
set session-key

Configures session key parameters for the manual crypto map.

Platform:

ASR 5000

Product:

PDSN, HA, GGSN, PDIF


Privilege:

Security Administrator, Administrator


Syntax

set session-key { inbound | outbound } { ah ah_spi [ encrypted ] key ah_key | esp esp_spi [ encrypted ] cipher encryption_key [ encrypted ] authenticator auth_key }

no set session-key { inbound | outbound }

no

Removes previously configured session key information.

inbound

Specifies that the key(s) will be used for tunnels carrying data sent by the security gateway.

outbound

Specifies that the key(s) will be used for tunnels carrying data sent by the system.

ah ah_spi

Configures the Security Parameter Index (SPI) for the Authentication Header (AH) protocol. The SPI is used to identify the AH security association (SA) between the system and the security gateway. ah_spi is an integer from 256 through 4294967295.

encrypted

Indicates the key provided is encrypted.

The encrypted keyword is intended only for use by the system while saving configuration scripts. The system displays the encrypted keyword in the configuration file as a flag that the variable following the key, cipher, and/or authenticator keyword is the encrypted version of the plain text key. Only the encrypted key is saved as part of the configuration file.

key ah_key

Configures the key used by the system to de/encapsulate IP packets using Authentication Header (AH) protocol. ah_key must be entered as either an alphanumeric string or a hexadecimal number beginning with “0x”.

The length of the configured key must match the configured algorithm.

esp esp_spi

Configures SPI for the Encapsulating Security Payload (ESP) protocol. The SPI is used to identify the ESP security association (SA) between the system and the security gateway. esp_spi is an integer from 256 through 4294967295.

The length of the configured key must match the configured algorithm.

cipher encryption_key

Specifies the key used by the system to de/encrypt the payloads of IP packets using the ESP protocol. encryption_key must be entered as either an alphanumeric string or a hexadecimal number beginning with “0x”.

The length of the configured key must match the configured algorithm.

authenticator auth_key

Specifies the key used by the system to authenticate the IP packets once encryption has been performed. auth_key must be entered as either an alphanumeric string or a hexadecimal number beginning with “0x”.

The length of the configured key must match the configured algorithm.


Usage:

Manual crypto maps rely on the use of statically configured keys to establish IPSec tunnels. This command allows the configuration of the static keys.

Identical keys must be configured on both the system and the security gateway in order for the tunnel to be established.

The length of the configured key must match the configured algorithm.

This command can be entered up to two time for the same crypto map: once to configure inbound key properties, and once to configure outbound key properties.


Example:
The following command configures a manual crypto map with the following session key properties:
  • Keys are for tunnels initiated by the system to the security gateway.
  • ESP will be used with an SPI of 310.
  • Encryption key is sd23r9skd0fi3as.
  • Authentication key is sfd23408imi9yn.
set session-key outbound
esp 310 cipher sd23r9skd0fi3as authenticator sfd23408imi9yn
set transform-set

Configures the name of a transform set that the crypto map is associated with.

Platform:

ASR 5000

Product:

PDSN, HA, GGSN, PDIF


Privilege:

Security Administrator, Administrator


Syntax 
[ no ] set
transform-set transform_name
no

Removes a previously configured transform set association.

set transform-set transform_name

Specifies the name of the transform set expressed as an alphanumeric string of 1 through 127 characters that is case sensitive.


Usage:

System transform sets contain the IPSec policy definitions for crypto maps. Refer to the crypto ipsec transform-set command for information on creating transform sets.

IMPORTANT:

Transform sets must be configured prior to configuring session key information for the crypto map.


Example:
The following command associates a transform set named esp_tset with the crypto map:
set transform-set esp_tset