PIC18f67J60没有从某些路由器接收dhcp报价

我在PIC18F67 J60上使用DHCP服务器使用TCP/IP协议栈。TCP/IP协议栈版本为5。设置与大多数路由器完美地工作，IP是通过DHCP获得的，并且一切都很好。这个问题出现在几个路由器上，我的板（同一个设置）不能接收DHCP提供包。目前我使用DigISOOL DG-H33TA，我正面临这个问题。观察WiReSARK流量，我看到董事会发送DHCP发现和路由器响应DHCP要约，但它没有收到在我的结束。下面的函数是StackTsk。C返回false。这是因为EPKTCNT是零。分析DHCP包，我观察到DigiSL路由器发送的DHCP提供的数据包大小是590字节。在其他路由器（工作）提供的DHCP大小为326字节的地方。但是接收缓冲器有足够的内存来接收这个数据包。我怀疑它是否能够接收任何数据包，或者可能是特定的数据包。我没有找到问题的地方。我无法弄清楚为什么没有收到包裹。有什么建议是最受欢迎的吗？我试着让我的头脑清醒一段时间。如有任何帮助，我们将不胜感激。



      以下为原文

    Hi.
Im using the TCP/IP Stack with DHCP Server on a PIC18F67J60. The TCP/IP stack version is 5.00. The setup works perfect with most of the routers, the IP is obtained over dhcp and everything is great.
The problem arises with few routers where my board(same setup) fails to receive DHCP offer packets.
Currently i am using digisol DG-HR3300TA on which i am facing the issue. Observing wireshark traffic i see the board sending DHCP discovery and the router responds with DHCP offer, but it is not received at my end. The below function is StackTsk .c returns false.
if(!MACGetHeader(&remoteNode.MACAddr, &cFrameType))
   break;

Thats because EPKTCNT is zero.
if(EPKTCNT == 0u)
    {
        return FALSE;
    }

Analyzing the dhcp packets i had observed that the packet size of dhcp offer sent by digisol router is 590 bytes. Where as the size of dhcp offer by other routers (working)  is 326 bytes. But the receive buffer has enough memory to receive this packet. I doubt it is able to receive any packet or maybe that particular offer packet. I am short of places to look for the problem.
I am unable to figure out why it is not receiving the packet.
Any suggestions are most welcome?
i am trying to get my head around this for quite some time. any help will be appreciated.