Thanks to All! I changed all two NICs on my Bridge box to Intel Pro/1000 MT card(with Intel e1000 driver). I think they can handle larger frames with VLAN tag. ( Thanks to Ben, Peter)
I also have one doubt: how to configure NICs and my bridge for larger frames with VLAN tag? I guess I need do so: (please correct me) Bridge box: Redhat 9.0 Linux 2.4.28 kernel 1. Change NICs on bridge MTU to 1504 ( 0r other value)Is it necessary? ifconfig eth0(1) mtu 1504 2. Change bridge MTU to larger value? ( is it necessary?) I couldn't change the MTU of br0, I got the " SIOCSIFMTU: Invalid argument" error. What's wrong with it? Hemminger: For this patch in your reply, Do I need apply it to the bridge code? As you know, the bridge code is built in the 2.4.28 kernel, I also need apply this change to bridge code? And a stupid question: where I apply it to? Which file? Thanks! Kingz -----Original Message----- From: Stephen Hemminger [mailto:[EMAIL PROTECTED] Sent: 2004年12月2日 9:48 To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; 'Derek Storvik'; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: My configuration in Bridge,802.1Q VLAN, and hotmail login, Thanks to all On Thu, 2 Dec 2004 20:10:58 -0800 "kingz" <[EMAIL PROTECTED]> wrote: > Hi All, > > For my issue, first thanks to ALL, I have some idea of it. > Also Thank Peter for his kind remind, I would become one good guy in > this list. > > Most mentioned MTU, but how I assure that the problem is just MTU, how I > debug it? > Here is my bridge configuration: > Internet > | > | > Gateway > | > | eth0 > Ethernet Bridge > | eth1 > | > H u b ( one normal hub or switch , no VLAN settings) > | \ > | \ > D-Link 802.1Q VLAN Switches (their uplink port-port 1 connected to > the upper hub are tagged, those ports connected with PCs are untagged). > > Bridge configuration: > Linux 2.4.26 ( kernel built in bridge function) > Eth0 RTL8139 driver > Eth1 Intel e100 NIC with eepro100 driver > > With VLAN tag, I met the hotmail login error, if without VLAN tag, all > are OK! > > Peter and Ben suggested me use intel NICs, I have one intel e100 NIC and > e1000 NIC, e1000 NIC is OK, but I cannt use the e100 card with the e100 > driver( from both Linux 2.4.26 and Intel site e100-3.2.3), so I only use > eepro100 driver. > How I can use the e100 with e100 driver? Can I use e100 and e1000 > together( use them as eth0,1)? > Any one can help me? There is some confusion about mtu and VLAN. Does mtu include VLAN tag or not? E100 allows the VLAN tag to be included (ie. actual_size > nic->netdev->mtu + VLAN_ETH_HLEN) but other drivers don't and the MTU reported to the bridge doesn't include the VLAN tag. You could change: int br_dev_queue_push_xmit(struct sk_buff *skb) { if (skb->len > skb->dev->mtu) kfree_skb(skb); to: int br_dev_queue_push_xmit(struct sk_buff *skb) { if (skb->len > skb->dev->mtu + 4) kfree_skb(skb);
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