20 messages in org.freebsd.freebsd-stableRe: Ethernet MTUs > 1500?| From | Sent On | Attachments |
|---|---|---|
| David Gilbert | Jul 3, 2000 8:22 pm | |
| Joerg Micheel | Jul 3, 2000 8:38 pm | |
| David Gilbert | Jul 3, 2000 8:43 pm | |
| Louis A. Mamakos | Jul 3, 2000 8:52 pm | |
| David Gilbert | Jul 3, 2000 9:37 pm | |
| Louis A. Mamakos | Jul 3, 2000 10:08 pm | |
| Tim Priebe | Jul 4, 2000 3:50 am | |
| Kevin Oberman | Jul 4, 2000 4:24 pm | |
| David Gilbert | Jul 4, 2000 6:46 pm | |
| Tim Priebe | Jul 5, 2000 5:46 am | |
| David Gilbert | Jul 5, 2000 6:20 am | |
| Luigi Rizzo | Jul 5, 2000 8:16 am | |
| Tim Priebe | Jul 5, 2000 9:56 am | |
| Luigi Rizzo | Jul 5, 2000 11:39 pm | |
| Tim Priebe | Jul 6, 2000 5:34 am | |
| David Gilbert | Jul 6, 2000 5:47 am | |
| Tim Priebe | Jul 6, 2000 8:04 am | |
| Luigi Rizzo | Jul 6, 2000 8:28 am | |
| Luigi Rizzo | Jul 6, 2000 8:37 am | |
| Tim Priebe | Jul 6, 2000 9:38 am |
| Subject: | Re: Ethernet MTUs > 1500? | |
|---|---|---|
| From: | David Gilbert (dgil...@velocet.ca) | |
| Date: | Jul 5, 2000 6:20:31 am | |
| List: | org.freebsd.freebsd-stable | |
"Tim" == Tim Priebe <ti...@polytechnic.edu.na> writes:
Tim> David Gilbert wrote:
"Kevin" == Kevin Oberman <ober...@es.net> writes:
Kevin> Louis has it exactly right. 802.3 was modified a couple of Kevin> years ago to allow for a maximum frame size of 1522 octets, up Kevin> from the original 1518. This was to allow the VLAN information Kevin> to fit in the frame.
Tim> Exactly, my point also we must update our code to conform to the Tim> new standard.
This is all I'm looking for, really. When you configure vlan support in FreeBSD, all the interfaces come up with 1496 byte MTUs. I suppose I don't really care what the IP MTU of the ethernet port is --- I just want a 1500 byte MTU on the vlan. I'm even willing to buy new ethernet ports (although the Intel 21143-based 4 port cards have worked well in the past for me).
The problem is that chaging the MTU on windoze based boxes (my customers) is problematic. Even changing the MTU on some BSD network interfaces is not easy. I suppose this means that my MRU is low, too...
But the problem here is also that path MTU discovery is somewhat broken on the internet and this low-MTU service is a pain for customers.
Dave.
-- ============================================================================ |David Gilbert, Velocet Communications. | Two things can only be | |Mail: dgil...@velocet.net | equal if and only if they | |http://www.velocet.net/~dgilbert | are precisely opposite. | =========================================================GLO================
To Unsubscribe: send mail to majo...@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message