Type for attachment control. Specifies the type of diffServAclAttachCtlAceIndex to relate with the diffServAclAttachCtlIndex. When the type is macAce(1), the index of diffServAclAceIndexList is the diffServMacAceEntry. When the type is ipAce(2), the index of diffServAclAceIndexList is the diffServIpAceEntry. When the type is ipv6Ace(3), the index of diffServAclAceIndexList is the diffServIpv6AceEntry. When the type is arpAce(4), the index of diffServAclAceIndexList is the diffServArpAceEntry.