Administrator Guide

• Enable IPsec authentication for OSPFv3 packets on an IPv6-based interface.
INTERFACE mode
ipv6 ospf authentication {null | ipsec spi number {MD5 | SHA1} [key-encryption-type] key}
• null: causes an authentication policy congured for the area to not be inherited on the interface.
• ipsec spi number: the security policy index (SPI) value. The range is from 256 to 4294967295.
• MD5 | SHA1: species the authentication type: Message Digest 5 (MD5) or Secure Hash Algorithm 1 (SHA-1).
• key-encryption-type: (optional) species if the key is encrypted. The valid values are 0 (key is not encrypted) or 7 (key is
encrypted).
• key: species 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 interface.
no ipv6 ospf authentication ipsec spi number
• Remove null authentication on an interface to allow the interface to inherit the authentication policy congured for the OSPFv3 area.
no ipv6 ospf authentication null
• Display the conguration of IPsec authentication policies on the router.
show crypto ipsec policy
• Display the security associations set up for OSPFv3 interfaces in authentication policies.
show crypto ipsec sa ipv6
Conguring IPsec Encryption on an Interface
To congure, remove, or display IPsec encryption on an interface, use the following commands.
Prerequisite: Before you enable IPsec encryption on an OSPFv3 interface, rst enable IPv6 unicast routing globally, congure an IPv6
address and enable OSPFv3 on the interface, and assign it to an area (refer to Conguration Task List for OSPFv3 (OSPF for IPv6)).
NOTE
: When you congure encryption using the ipv6 ospf encryption ipsec command, you enable both IPsec
encryption and authentication. However, when you enable authentication on an interface using the ipv6 ospf
authentication ipsec
command, you do not enable encryption at the same time.
The SPI value must be unique to one IPsec security policy (authentication or encryption) on the router. Congure the same authentication
policy (the same SPI and key) on each OSPFv3 interface in a link.
• Enable IPsec encryption for OSPFv3 packets on an IPv6-based interface.
INTERFACE mode
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 congured 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: species 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: species 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) species if the key is encrypted. The valid values are 0 (key is not encrypted) or 7 (key is
encrypted).
• authentication-algorithm: species the encryption authentication algorithm to use. The valid values are MD5 or SHA1.
• key: species 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).
662
Open Shortest Path First (OSPFv2 and OSPFv3)