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List:       linux-vlan
Subject:    Re: [VLAN] MTU Problem?
From:       "Bluewave Joe" <padasali () hotmail ! com>
Date:       2001-12-10 11:48:59
[Download RAW message or body]

Hi,
from link "http://scry.wanfear.com/~greear/vlan/cisco_howto.html" I got 
following info. See it is of any help.

2.My eepro has MTU problems.

        Here is a patch sent in by gleb@nbase.co.il

             filename="linux-2.2.14-eepro100-vlan.patch"

        --- linux/drivers/net/eepro100.c        Tue Oct 26 20:53:40 1999
        +++ linux1/drivers/net/eepro100.c       Sun May 14 07:47:34 2000
        @@ -377,12 +377,12 @@
         const char i82557_config_cmd[22] = {
                22, 0x08, 0, 0,  0, 0x80, 0x32, 0x03,  1, /* 1=Use MII  
0=Use AUI */
                0, 0x2E, 0,  0x60, 0,
        -       0xf2, 0x48,   0, 0x40, 0xf2, 0x80,              /* 
0x40=Force full-duplex */
        +       0xf2, 0x48,   0, 0x40, 0xfa, 0x80,              /* 
0x40=Force full-duplex */
                0x3f, 0x05, };
         const char i82558_config_cmd[22] = {
                22, 0x08, 0, 1,  0, 0x80, 0x22, 0x03,  1, /* 1=Use MII  
0=Use AUI */
                0, 0x2E, 0,  0x60, 0x08, 0x88,
        -       0x68, 0, 0x40, 0xf2, 0xBD,              /* 0xBD->0xFD=Force 
full-duplex */
        +       0x68, 0, 0x40, 0xfa, 0xBD,              /* 0xBD->0xFD=Force 
full-duplex */
                0x31, 0x05, };

         /* PHY media interface chips. */





In addition to this, you will have to increment the max frame size by 4.








>I notice the same problem as with eepro100 unpatched
>driver on ix86 : pings with packet size above 1468 bytes fail. Does anybody
>have an idea/patch/workaround for this?
>
>According to /proc/pci, I'm using a standard HappyMEal Interface :
>     Ethernet controller: Sun Microsystems Computer Corp. Happy Meal (rev 
>1).
>       IRQ 6531872.
>       Master Capable.  Latency=80.  Min Gnt=10.Max Lat=5.
>       Non-prefetchable 32 bit memory at 0x1ffe0000000 [0x1ffe0007fff].


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