IES customer IP interfaces can be configured with most of the same options found on the core IP interfaces. The advanced configuration options supported are:
QoS Policy Propagation Using BGP (QPPB)
VRRP - for IES services with more than one IP interface
Cflowd
Secondary IP addresses
ICMP Options
Configuration options found on core IP interfaces not supported on IES IP interfaces are:
MPLS forwarding
NTP broadcast receipt