AW: [VLAN] e100 VLAN and MTU issues (fwd)

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The e100 driver supports Vlans without MTU issues on cards that support it...    What is the model of the card you are using?   I have a pile of cards here that are old intels which work with the e100 driver, but don't run vlans because they can't accept the larger packets.

john


-----Urspr?ngliche Nachricht-----
Von: Iain McBride [mailto:imcbride@xxxxxxxxxxx] 
Gesendet: Monday, November 15, 2004 10:33 AM
An: vlan@xxxxxxxxxxxx
Betreff: [VLAN] e100 VLAN and MTU issues (fwd)

*bump*

Still hoping for suggestions to troubleshoot MTU issues using e100 cards!

We really need to get this working and would rather not have to deploy a
hardware router.

Regards,
Iain

---------- Forwarded message ----------
Date: Mon, 18 Oct 2004 17:47:33 -0400 (EDT)
From: Iain McBride <imcbride@xxxxxxxxxxx>
To: vlan@xxxxxxxxxxxx
Subject: [VLAN] e100 VLAN and MTU issues

Hello!

While everything I can find online regarding the e100 driver in 2.6
kernels not needing a patch to avoid MTU issues with VLAN tagging, I've
been unsuccessful in getting VLAN-tagged connections to function properly.

VLAN router: 2x e100 NICs, 2.6.8.1 Linux kernel, VLANs config'd

Switch:      Cisco 2924, trunk enabled on the VLAN router's port, end
		machine's port assigned to proper VLAN

End machine: e100 NIC, 2.6.8.1 Linux kernel, normal interface config

When I take another machine and put its switch port into a VLAN, I
experience the strange behaviour typical of MTU issues unless I configure
the end machine with an MTU of around 1468 or smaller.  Large file
transfers time out, packets silently dropped can't ping with 1500 byte
packet payload, etc.

If I remove the VLAN trunking and bring up the router interface in the
normal fashion, everything is fine.

Any hints on further troubleshooting?

Thanks!
Iain

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