Concept Guide

● Remove an IPsec encryption policy from an interface.
no ipv6 ospf encryption ipsec spi number
● Remove null encryption on an interface to allow the interface to inherit the encryption policy configured for the OSPFv3
area.
no ipv6 ospf encryption null
● Display the configuration of IPsec encryption policies on the router.
show crypto ipsec policy
● Display the security associations set up for OSPFv3 interfaces in encryption policies.
show crypto ipsec sa ipv6
Configuring IPSec Authentication for an OSPFv3 Area
To configure, remove, or display IPSec authentication for an OSPFv3 area, use the following commands.
Prerequisite: Before you enable IPsec authentication on an OSPFv3 area, first enable OSPFv3 globally on the router (refer to
Configuration Task List for OSPFv3 (OSPF for IPv6)).
The security policy index (SPI) value must be unique to one IPSec security policy (authentication or encryption) on the router.
Configure the same authentication policy (the same SPI and key) on each interface in an OPSFv3 link.
If you have enabled IPSec encryption in an OSPFv3 area using the area encryption command, you cannot use the area
authentication command in the area at the same time.
The configuration of IPSec authentication on an interface-level takes precedence over an area-level configuration. If you remove
an interface configuration, an area authentication policy that has been configured is applied to the interface.
● Enable IPSec authentication for OSPFv3 packets in an area.
CONF-IPV6-ROUTER-OSPF mode
area-id authentication ipsec spi number {MD5 | SHA1} [key-encryption-type] key
○ area area-id: specifies the area for which OSPFv3 traffic is to be authenticated. For area-id, enter a number or an
IPv6 prefix.
○ spi number: is the SPI value. The range is from 256 to 4294967295.
○ MD5 | SHA1: specifies the authentication type: message digest 5 (MD5) or Secure Hash Algorithm 1 (SHA-1).
○ key-encryption-type: (optional) specifies if the key is encrypted. The valid values are 0 (key is not encrypted) or 7
(key is encrypted).
○ key: specifies the text string used in authentication. All neighboring OSPFv3 routers must share key to exchange
information. For MD5 authentication, the key must be 32 hex digits (non-encrypted) or 64 hex digits (encrypted). For
SHA-1 authentication, the key must be 40 hex digits (non-encrypted) or 80 hex digits (encrypted).
● Remove an IPSec authentication policy from an OSPFv3 area.
no area area-id authentication ipsec spi number
● Display the configuration of IPSec authentication policies on the router.
show crypto ipsec policy
Configuring IPsec Encryption for an OSPFv3 Area
To configure, remove, or display IPsec encryption in an OSPFv3 area, use the following commands.
Prerequisite: Before you enable IPsec encryption in an OSPFv3 area, first enable OSPFv3 globally on the router (refer to
Configuration Task List for OSPFv3 (OSPF for IPv6)).
The SPI value must be unique to one IPsec security policy (authentication or encryption) on the router. Configure the same
encryption policy (the same SPI and keys) on each interface in an OPSFv3 link.
NOTE:
When you configure encryption using the area encryption command, you enable both IPsec encryption and
authentication. However, when you enable authentication on an area using the area authentication command, you do
not enable encryption at the same time.
If you have enabled IPsec authentication in an OSPFv3 area using the area authentication command, you cannot use the
area encryption command in the area at the same time.
Open Shortest Path First (OSPFv2 and OSPFv3)
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