Reference Guide
An SPI value must be unique to one IPsec security policy (authentication or 
encryption) on the router. Configure the same authentication policy (same SPI and 
key) on each OSPFv3 interface in a link.
To remove an IPsec authentication policy from an interface, enter the no ipv6 ospf 
authentication spi number command. To remove null authentication on an 
interface to allow the interface to inherit the authentication policy configured for 
the OSPFv3 area, enter the no ipv6 ospf authentication null command.
Related 
Commands
area authentication – configures an IPsec authentication policy for an OSPFv3 
area.
show crypto ipsec policy – displays the configuration of IPsec authentication 
policies.
show crypto ipsec sa ipv6 – displays the security associations set up for OSPFv3 
interfaces in authentication policies.
ipv6 ospf bfd all-neighbors
Establish BFD sessions with all OSPFv3 neighbors on a single interface or use non-default BFD session 
parameters.
S4820T
Syntax
ipv6 ospf bfd all-neighbors [disable | [interval interval 
min_rx min_rx multiplier value role {active | passive}]]
To disable all BFD sessions on an OSPFv3 interface implicitly, use the no ipv6 
ospf bfd all-neighbors disable 
command in interface mode..
Parameters
disable (OPTIONAL) Enter the keyword disable to disable BFD on 
this interface.
interval 
milliseconds
(OPTIONAL) Enter the keyword interval to specify non-
default BFD session parameters beginning with the 
transmission interval. The range is from 50 to 1000. The 
default is 100.
min_rx 
milliseconds
Enter the keywords min_rx to specify the minimum rate at 
which the local system receives control packets from the 
remote system. The range is from 50 to 100. The default is 
100.
multiplier value Enter the keyword multiplier to specify the number of 
packets that must be missed in order to declare a session 
down. The range is from 3 to 50. The default is 
3.
role [active | 
passive]
Enter the role that the local system assumes:
• Active — The active system initiates the BFD session. 
Both systems can be active for the same session.
1244
Open Shortest Path First (OSPFv2 and OSPFv3)










