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ipv6 ospf encryption {null | ipsec spi number esp encryption-algorithm [key-encryption-type]
key authentication-algorithm [key-authentication-type] key}
• null: causes an encryption policy congured for the area to not be inherited on the interface.
• ipsec spi number: is the security policy index (SPI) value. The range is from 256 to 4294967295.
•
esp encryption-algorithm: species the encryption algorithm used with ESP. The valid values are 3DES, DES, AES-CBC,
and NULL. For AES-CBC, only the AES-128 and AES-192 ciphers are supported.
• key: species the text string used in the encryption. All neighboring OSPFv3 routers must share the same key to decrypt
information. Required lengths of a non-encrypted or encrypted key are: 3DES - 48 or 96 hex digits; DES - 16 or 32 hex digits; AES-
CBC - 32 or 64 hex digits for AES-128 and 48 or 96 hex digits for AES-192.
• key-encryption-type: (optional) species if the key is encrypted. The valid values are 0 (key is not encrypted) or 7 (key is
encrypted).
• authentication-algorithm: species the encryption authentication algorithm to use. The valid values are MD5 or SHA1.
• key: species 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).
• key-authentication-type: (optional) species if the authentication key is encrypted. The valid values are 0 or 7.
• 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 congured for the OSPFv3 area.
no ipv6 ospf encryption null
• Display the conguration 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
Conguring IPSec Authentication for an OSPFv3 Area
To congure, remove, or display IPSec authentication for an OSPFv3 area, use the following commands.
Prerequisite: Before you enable IPsec authentication on an OSPFv3 area, rst enable OSPFv3 globally on the router (refer to Conguration
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. Congure
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 conguration of IPSec authentication on an interface-level takes precedence over an area-level conguration. If you remove an
interface conguration, an area authentication policy that has been congured 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: species the area for which OSPFv3 trac is to be authenticated. For area-id, enter a number or an IPv6
prex.
• spi number: is the SPI value. The range is from 256 to 4294967295.
• MD5 | SHA1: species the authentication type: message digest 5 (MD5) or Secure Hash Algorithm 1 (SHA-1).
• key-encryption-type: (optional) species if the key is encrypted. The valid values are 0 (key is not encrypted) or 7 (key is
encrypted).
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Open Shortest Path First (OSPFv2 and OSPFv3)