According to everything I have read about the various OSA adapters, the maximum frame size supported is 8992. Are you rounding up to 9,000, or am I missing something?
Also, perhaps a nework guru out there can answer this question: If I have the OSA with MTU=8992 in a small private network, and a node on the network has the MTU defined as 9000, I assume there could be some switch overhead in translating the frames. Is there a benefit to having every node at 8992 as opposed to 9000, which seems to be a common 'default' for a net with jumbo frames? Thanks, Scott Ledbetter StorageTek -----Original Message----- From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of Uriel Carrasquilla Sent: Friday, June 10, 2005 7:50 AM To: [email protected] Subject: Re: MTU consideration for dummy/eth interfaces If you are using OSA interface, you may want to consider an MTU of 9,000. On NIC/1-G ethernet cards, 9,000 is the recommended value. I also had the same problem with my zebra/ospfd+dummy and the network guys did not want to change the router's MTU to 9000 so I live with 1500. It is early for me to tell if it is rock solid but I realize that my entire network connection to my zLinux now depends on how stable zebra/ospfd proves to be. Regards, [EMAIL PROTECTED] NCCI Boca Raton, Florida 561.893.2415 greetings / avec mes meilleures salutations / Cordialmente mit freundlichen Gr��en / Med v�nlig h�lsning Max <[EMAIL PROTECTED] To: [email protected] .it> cc: Sent by: Linux on Subject: MTU consideration for dummy/eth interfaces 390 Port <[EMAIL PROTECTED] IST.EDU> 06/09/2005 04:35 AM Please respond to Linux on 390 Port Guys, I've configured two ethernet interfaces with a dummy interface in order to have an High Availability network. I'm using Zebra for dynamic routing. I was able to work with this system only changing the ethernet MTU from 1492 (Linux default) to 1500... Seems related to my router configuration (4507)... Do you think that I can experience some problem with 1500 MTU size or I need to change some value on router for compatibility with zLinux systems? Ciao Max ___________________________________ Yahoo! Mail: gratis 1GB per i messaggi e allegati da 10MB http://mail.yahoo.it ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 The information contained in this e-mail message is intended only for the personal and confidential use of the recipient(s) named above. This message may be an attorney-client communication and/or work product and as such is privileged and confidential. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this document in error and that any review, dissemination, distribution, or copying of this message is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
