MSR3660 作为DHCP客户端获取不到地址

求助：使用WAC360 WAN接口作为DHCP 客户端可以获取到地址，但是使用MSR 3660却无法获取到地址。debug中AC可以收到服务器发来的BOOTPREPLY，而MSR3660收不到。

版本： version 7.1.064, Release 0605P10

设置：

interface GigabitEthernet0/2

 port link-mode route

 description Multiple_Line

 mtu 1400

 ip address dhcp-alloc

 tcp mss 1024

 nat outbound

3660debug信息：看到应该是服务器没有回BOOTPREPLY

*Jul 20 18:07:29:693 2017 H3C DHCPC/7/PACKET: 

To 255.255.255.255 port 67, interface GigabitEthernet0/2

    Message type: REQUEST (1)

    Hardware type: 1, Hardware address length: 6

    Hops: 0, Transaction ID: 3064209889

    Seconds: 0, Broadcast flag: 1

    Client IP address: 0.0.0.0   Your IP address: 0.0.0.0

    Server IP address: 0.0.0.0   Relay agent IP address: 0.0.0.0

    Client hardware address: 9c06-1b9a-8812

    Server host name: not configured

    Boot file name: not configured

    DHCP message type: DHCPDISCOVER (1)

*Jul 20 18:07:29:694 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Successfully sent DHCPDISCOVER packet.

*Jul 20 18:07:42:693 2017 H3C DHCPC/7/PACKET: 

To 255.255.255.255 port 67, interface GigabitEthernet0/2

    Message type: REQUEST (1)

    Hardware type: 1, Hardware address length: 6

    Hops: 0, Transaction ID: 3064209889

    Seconds: 0, Broadcast flag: 1

    Client IP address: 0.0.0.0   Your IP address: 0.0.0.0

    Server IP address: 0.0.0.0   Relay agent IP address: 0.0.0.0

    Client hardware address: 9c06-1b9a-8812

    Server host name: not configured

    Boot file name: not configured

    DHCP message type: DHCPDISCOVER (1)

*Jul 20 18:07:42:694 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Successfully sent DHCPDISCOVER packet.

*Jul 20 18:07:43:693 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Beginning to detect IP address conflict via ARP.

*Jul 20 18:07:43:694 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Successfully sent ARP request for address 169.254.136.21.

*Jul 20 18:07:44:693 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Successfully sent ARP request for address 169.254.136.21.

*Jul 20 18:07:45:693 2017 H3C DHCPC/7/EVENT: 

 GigabitEthernet0/2: Received no ARP reply for 169.254.136.21, so the IP address is available.

WAC360 的debug信息：

*Jul 20 19:36:26:742 2017 AC DHCPC/7/DHCPC_PACKET: 

  GigabitEthernet1/0/5: Send a DHCP packet...

  Head: op (BOOTPREQUEST); htype (ETHERNET); hlen (6); xid (0xa1c8850); 

  ciaddr (0.0.0.0); yiaddr (0.0.0.0); chaddr (b0f9-6391-d381); 

  Options: 

    63 82 53 63 35 01 01 0C 02 41 43 32 04 2A 02 D7 

    36 37 08 01 79 03 06 0F 21 2B 8A 39 02 04 80 3C 

    0F 48 33 43 2E 20 48 33 43 20 57 41 43 33 36 30 

    3D 24 00 62 30 66 39 2E 36 33 39 31 2E 64 33 38 

    31 2D 47 69 67 61 62 69 74 45 74 68 65 72 6E 65 

    74 31 2F 30 2F 35 FF 

*Jul 20 19:36:26:742 2017 AC DHCPC/7/DHCPC_EVENT: 

  GigabitEthernet1/0/5: Sending DHCPDISCOVER packet succeeded.

*Jul 20 19:36:26:743 2017 AC DHCPC/7/DHCPC_EVENT: 

  GigabitEthernet1/0/5: FSM state transfers (INIT-->SELECTING) successfully.

*Jul 20 19:36:26:750 2017 AC DHCPC/7/DHCPC_EVENT: 

  GigabitEthernet1/0/5: Receive a packet.

*Jul 20 19:36:26:750 2017 AC DHCPC/7/DHCPC_PACKET: 

  GigabitEthernet1/0/5: Receive a DHCP packet...

  Head: op (BOOTPREPLY); htype (ETHERNET); hlen (6); xid (0xa1c8850); 

  ciaddr (0.0.0.0); yiaddr (42.2.215.54); chaddr (b0f9-6391-d381); 

  Option: type (DHCPOFFER); mask (255.255.255.0); lease (1800); 

  T1 (900); T2 (1575); server (168.70.124.254); default router (42.2.215.254); DNS (218.102.23.77); DNS (218.102.62.71); 

*Jul 20 19:36:26:750 2017 AC DHCPC/7/DHCPC_EVENT: 

  GigabitEthernet1/0/5: Select 168.70.124.254 as the server.