Command introduced in JUNOSe Release 7.1.0.
Manually configures a 1024-bit or 2048-bit ISAKMP/IKE public key that a remote peer uses for RSA authentication without the need for a digital certificate. The key string represents the public key hexadecimal data that includes the ASN.1 object identifier and sequence tags for RSA encryption. There is no no version. To remove a peer public key from the router, use the no version of the ipsec key pubkey-chain rsa command.
IPSec Peer Public Key Configuration