*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
