1esp from 3ffe::1 to 3ffe::2 spi 0xdeadbeef:0xbeefdead auth hmac-sha1 enc aes \
2 authkey 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \
3 enckey 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee:0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
4