Concept Guide

– 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 OSPFv3 area.
no area area-id authentication ipsec spi number
• Display the conguration of IPSec authentication policies on the router.
show crypto ipsec policy
Conguring IPsec Encryption for an OSPFv3 Area
To congure, remove, or display IPsec encryption in an OSPFv3 area, use the following commands.
Prerequisite: Before you enable IPsec encryption in an OSPFv3 area, rst enable OSPFv3 globally on the router (refer to Conguration
Task List for OSPFv3 (OSPF for IPv6)
).
The SPI value must be unique to one IPsec security policy (authentication or encryption) on the router. Congure the same encryption
policy (the same SPI and keys) on each interface in an OPSFv3 link.
NOTE: When you congure 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.
The conguration of IPsec encryption on an interface-level takes precedence over an area-level conguration. If you remove an interface
conguration, an area encryption policy that has been congured is applied to the interface.
• Enable IPsec encryption for OSPFv3 packets in an area.
CONF-IPV6-ROUTER-OSPF mode
area area-id encryption ipsec spi number esp encryption-algorithm [key-encryption-type] key
authentication-algorithm [key-authentication-type] key
– area area-id: species the area for which OSPFv3 trac is to be encrypted. For area-id, enter a number or an IPv6 prex.
– 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. The 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. Valid values: 0 (key is not encrypted) or 7 (key is
encrypted).
– authentication-algorithm: species the authentication algorithm to use for encryption. 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).
– key-authentication-type: (optional) species if the authentication key is encrypted. The valid values are 0 or 7.
• Remove an IPsec encryption policy from an OSPFv3 area.
no area area-id encryption ipsec spi number
• Display the conguration of IPsec encryption policies on the router.
show crypto ipsec policy
Open Shortest Path First (OSPFv2 and OSPFv3)
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