Interface address pool:
display ip pool [ interface interface-pool-name [ start-ip-address [ end-ip-address ] | all | conflict | expired | used ] ]
Global address pool:
display ip pool [ name ip-pool-name [ start-ip-address [ end-ip-address ] | all | conflict | expired | used [ user-type { dhcp | pppoe | l2tp | ipsec | ssl-vpn | ppp } ] ] ]