The vPC peer-gateway capability allows a vPC switch to act as the active gateway for packets that are addressed to the router MAC address of the vPC peer. This feature enables local forwarding of such packets without the need to cross the vPC peer link. Which statements are true about the vPC peer-gateway？ （）   

• A、 The vPC peer-gateway feature is enabled by default.
• B、 The vPC peer-gateway feature can be configured globally under the vPC domain submode.
• C、 Enabling the peer-gateway feature automatically disables IP redirects on all interface VLANs mapped over a vPC VLAN to avoid generation of IP redirect messages for packets switched through the peer gateway router.
• D、 The vPC peer-gateway feature only works with HSRP protocol.