The value of this object identifies the packet authentication mode of IS-IS area authentication:
none (0): Authentication mode is not configured.
authenticateall (1): Encapsulates authentication information for both transmitted and received LSPs and SNPs.
allsendonly (2): Encapsulates authentication information for both generated LSPs and SNPs; does not authenticate received LSPs or SNPs.
snppacketauthenticationavoid (3): Encapsulates authentication information for only generated LSPs and authenticates received LSPs.
snppacketsendonly (4): Encapsulates authentication information for generated LSPs and SNPs; authenticates only received LSPs but does not authenticate received SNPs.
By default, authentication is not configured.