Users Guide

When you configure encryption at the area level, both IPsec encryption and authentication are enabled. You cannot configure
encryption if you have already configured an IPsec area authentication using the area ospf authentication ipsec
command. To configure encryption, you must first delete the authentication policy.
● Enable IPsec encryption for OSPFv3 packets in an area in Router-OSPFv3 mode.
area area-id encryption ipsec spi number esp encryption-type key
authentication-type key
○ area area-id — Enter an area ID as a number or IPv6 prefix.
○ ipsec spi number — Enter a unique security policy index (SPI) value, from 256 to 4294967295.
○ esp encryption-type — Enter the encryption algorithm used with ESP (3DES, DES, AES-CBC, or NULL). For
AES-CBC, only the AES-128 and AES-192 ciphers are supported.
○ key — Enter the text string used in the encryption algorithm. All neighboring OSPFv3 routers must share the key to
decrypt information. Only a non-encrypted key is supported. Required lengths of the non-encrypted key are: 3DES — 48
hex digits; DES — 16 hex digits; AES-CBC — 32 hex digits for AES-128 and 48 hex digits for AES-192.
○ authentication-type — Enter the encryption authentication MD5 or SHA1 algorithm to use.
○ key — Enter the text string used in the authentication algorithm. All neighboring OSPFv3 routers must share the key
to exchange information. Only a non-encrypted key is supported. For MD5 authentication, the non-encrypted key must
be 32 plain hex digits. For SHA1 authentication, the non-encrypted key must be 40 hex digits. An encrypted key is not
supported.
To delete an IPsec encryption policy, use the no area area-id encryption ipsec spi number command.
Configure IPsec encryption for OSPFv3 area
OS10(config-router-ospfv3-100)# area 1 encryption ipsec spi 401 esp des 1234567812345678
md5
12345678123456781234567812345678
OS10(config-router-ospfv3-100)# show configuration
!
router ospfv3 100
area 0.0.0.1 encryption ipsec spi 401 esp des 1234567812345678 md5
12345678123456781234567812345678
Troubleshoot OSPFv3
You can troubleshoot OSPFv3 operations and check questions for typical issues that interrupt a process.
● Is OSPFv3 enabled globally?
● Is OSPFv3 enabled on the interface?
● Are adjacencies established correctly?
● Are the interfaces configured for L3 correctly?
● Is the router in the correct area type?
● Are the OSPF routes included in the OSPF database?
● Are the OSPF routes included in the routing table in addition to the OSPF database?
● Are you able to ping the link-local IPv6 address of adjacent router interface?
Troubleshooting OSPFv3 with show Commands
● View a summary of all OSPF process IDs enabled in EXEC mode.
show running-configuration ospfv3
● View summary information of IP routes in EXEC mode.
show ipv6 route summary
● View summary information for the OSPF database in EXEC mode.
show ipv6 ospf database
● View the configuration of OSPF neighbors connected to the local router in EXEC mode.
show ipv6 ospf neighbor
Layer 3
777