我的linux终端不能接收ieee 802.3(RFC 1042)的IP包?

zleoz

我的网络连接如下

A----B1----B2-----C
其中A 和C 是linux 终端,B1和B2是cisco无线网桥,问题是
在A PING C的时候如果网桥是ieee 802.3的包(RFC 1042)而不是以太网的包(RFC 894)就PING不通,但是如果把C换成NT的终端就可以PING通.但是C可以收到A来的UDP报文.
用网络分析仪看了一下,好象是象上面我说的一样"linux终端不能接收ieee 802.3(RFC 1042)的IP包",具体表现在不能解析LLC?
我现在不太明白,可能分析的也不对.有哪个高手可以指点一下?

zleoz

大家看看抓的包
Frame 4 (68 bytes on wire, 68 bytes captured)
    Arrival Time: Jul  8, 2006 10:45:49.659089000
    Time delta from previous packet: 0.464130000 seconds
    Time relative to first packet: 0.519342000 seconds
    Frame Number: 4
    Packet Length: 68 bytes
    Capture Length: 68 bytes
IEEE 802.3 Ethernet
    Destination: ff:ff:ff:ff:ff:ff (Broadcast)
    Source: 00:20:0c:10:e4:b6 (Adastra_10:e4:b6)
    Length: 54
Logical-Link Control
    DSAP: SNAP (0xaa)
    IG Bit: Individual
    SSAP: SNAP (0xaa)
    CR Bit: Command
    Control field: U, func = UI (0x03)
        000. 00.. = Unnumbered Information
        .... ..11 = Unnumbered frame
    Organization Code: Encapsulated Ethernet (0x000000)
    Type: ARP (0x0806)
Address Resolution Protocol (request)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    Sender MAC address: 00:20:0c:10:e4:b6 (Adastra_10:e4:b6)
    Sender IP address: 172.16.2.4 (172.16.2.4)
    Target MAC address: 00:00:00:00:00:00 (00:00:00_00:00:00)
    Target IP address: 172.16.6.66 (172.16.6.66)

是172.16.2.4 ping 172.16.6.66