Administrator Guide
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).
• 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).
• Remove an IPSec authentication policy from an OSPFv3 area.
no area area-id authentication ipsec spi number
• Display the conguration of IPSec authentication policies on the router.
show crypto ipsec policy
Conguring IPsec Encryption for an OSPFv3 Area
To congure, 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 Conguration
Task List for OSPFv3 (OSPF for IPv6)).
The SPI value must be unique to one IPsec security policy (authentication or encryption) on the router. Congure the same encryption
policy (the same SPI and keys) on each interface in an OPSFv3 link.
NOTE
: When you congure 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 conguration of IPsec encryption on an interface-level takes precedence over an area-level conguration. If you remove an interface
conguration, an area encryption policy that has been congured 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: species the area for which OSPFv3 trac is to be encrypted. For area-id, enter a number or an IPv6 prex.
• 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.
Open Shortest Path First (OSPFv2 and OSPFv3)
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