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Title: Endian Jumbo Frame Post by: bautzen on Wednesday 30 June 2010, 08:58:23 pm Hi to all, I would like to know if it could be possible to change MTU to 2 internal NIC on efw2.4. I other words I have something like this:
SCENARIO: [SERVER SBS 2003 WITH ISA 2004] * NIC1 to internal lan (10.1.0.6/16) with MTU 1500 (it's main gateway for the clients) * NIC2 to DMZ lan (172.16.0.100) with MTU 1500. Through this inet my LAN clients exit to intenet [ENDIAN EFW 2.4] * NIC1 to internal lan and for OpenVPN connections (10.1.0.254/16) and (10.3.0.254/16) MTU1500 * NIC2 to DMZ (172.16.0.254/24) MTU1500 * NIC3 to "Service LAN" for NAS, iSCSI, NFS etc (10.2.0.254/16) MTU1500 * NIC4 to ISP Router (192.168.0.253/24) and gw 192.168.0.254 (router cisco) MTU1500 My SBS2003 Premium doesn't accept a third NIC for Service LAN for that reason I have to route the traffic through endian gateway (10.1.0.254) to reach 10.2.0.0 net Now form my SBS I can quite open my NAS on 10.2.0.10 and connect to iSCSI Target correctly but the performance are non so good. My NAS has MTU 9000 and if I create a new server on Service LAN and I enable jumbo frame I can quite ping the NAS correctly (ping -f -l 8900 10.2.0.10). If I enable Jumbo Frame on my NIC1 on SB2003, after I have the bottleneck on my endian firewall!!! MY questions are: 1) If I enable the jumbo frame on internal NIC1 of my SBS2003, could I have some problems on client's side? The NIC1 is also default gateway for the lan to surf internet!!!! 2) There is a way to change MTU on endian for the NIC1 and NIC3 and if yes what problems could I have for the web surfing and publishing of my intranet web applications? If someone have a better solution, please let me know Sincerely best regards Patrick |