dns_rdata_fromtext: /etc/bind/db.override:16: near ''$IP'': bad dotted quad

;The Variables here are NIC and IP
; BIND data file for overridden IPs
;
$TTL  86400
@   IN  SOA ns1 root (
            2012100401  ; serial
            604800      ; refresh 1w
            86400       ; retry 1d
            2419200     ; expiry 4w
            86400       ; minimum TTL 1d
            )

; need atleast a nameserver
    IN  NS  ns1
; specify nameserver IP address
ns1 IN  A   $IP                ; external IP from $NIC
; provide IP address for domain itself
@   IN  A   $IP                ; external IP from $NIC
; resolve everything with the same IP address as ns1
*   IN  A   $IP                 ; external IP from $NIC