Re: [Bacula-users] Problems with Jumbo packets?
Dear Bill, In message <4f0728e7.7050...@revpol.com> you wrote: > > A quick (non-bacula) way to test is to ssh from one machine to the other and > run a find / command or something that will generate similar amount of output. > If jumbo frames are not enabled on the whole path, then this output will > appear to "just hang" and you will no longer have connectivity to the system. > > It is also possible that some of the NICs in your servers are not properly > supporting the higher MTU that you are setting. Indeed it appears I have to look deeper into the NIC / driver side of things. Thanks for all the advice. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de An expert is a person who avoids the small errors while sweeping on to the grand fallacy. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
Dear Frank Sweetser, In message <4f0722a4.5090...@wpi.edu> you wrote: > > Are all of the machines on the same subnet? If not, you'll also have to check > the MTU on all of your local router interfaces. Yes, they are all in the same net, and all on the same switch. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Quote from the Boss after overriding the decision of a task force he created to find a solution: "I'm sorry if I ever gave you the impression your input would have any effect on my decision for the outcome of this project!" -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
Dear Alexandre, In message <4f072790.9060...@horoa.net> you wrote: > > Some Network card are supposed to "support" Jumbo frames but not as high > value as 9000 octets. > I remember I had issues with some broadcom NIC that couldn't go further > than 7200. > Maybe you could take a look at the NIC on the impacted hosts Yes, I do have some of these, too. But these are easy to spot as they don't accept larger MTU's: # ifconfig eth0 mtu 9000 SIOCSIFMTU: Invalid argument # ifconfig eth0 mtu 7200 # Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de Applying computer technology is simply finding the right wrench to pound in the correct screw. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
Hi, You can use ping to check the end-to-end maximum MTU working size: ping -Mdo -s 8000 192.168.X.X increase or reduce the size (8000) until you get pings back from the FD client (mine goes up to 8972) Pablo - Original Message - From: "Frank Sweetser" To: bacula-users@lists.sourceforge.net Sent: Friday, January 6, 2012 11:34:44 AM Subject: Re: [Bacula-users] Problems with Jumbo packets? On 01/06/2012 11:30 AM, Wolfgang Denk wrote: > Hello, > > I know that this is not exactly related to Bacula, but maybe some > other user has seen similar behaviour. > > I have problems when trying to enable support for jumbo frames on the > network. All NICs and switches are supposed to support that, however > on some systems the communication of the FD to the SD stops as soon as > I change on the FD the MTU from the default of 1500 to a higher value > (9000). The MTU on the DIR and SD can be set to 9000 without visible > impact on bacula. Are all of the machines on the same subnet? If not, you'll also have to check the MTU on all of your local router interfaces. Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
On 01/06/12 11:55, Alexandre Chapellon wrote: > Some Network card are supposed to "support" Jumbo frames but not as high > value as 9000 octets. > I remember I had issues with some broadcom NIC that couldn't go further > than 7200. > Maybe you could take a look at the NIC on the impacted hosts That. Before enabling jumbo frames on ANY network link, test from both ends with MTU steps from about 4000 or so to 9000 in steps of 500 to 1000 (smaller, if you're patient) to make sure that both NICs *AND THEIR DRIVERS* actually support jumbo frames, and find out what maximum MTU they support. I bought a D-Link 24-port gigabit switch that supports jumbo frames up to about MTU 9400, specifically to get jumbo frame support, and only then, when I could actually test, found out that neither the Solaris 10 bcm driver for the Broadcom GigE ports on my server, nor the Linux forcedeth driver for the nVidia MCP77 GigE port on my workstation, support jumbo frames. Needless to say, I was annoyed. -- Phil Stracchino, CDK#2 DoD#299792458 ICBM: 43.5607, -71.355 ala...@caerllewys.net ala...@metrocast.net p...@co.ordinate.org Renaissance Man, Unix ronin, Perl hacker, SQL wrangler, Free Stater It's not the years, it's the mileage. -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
On 01/06/2012 11:30 AM, Wolfgang Denk wrote: > Hello, > > I know that this is not exactly related to Bacula, but maybe some > other user has seen similar behaviour. > > I have problems when trying to enable support for jumbo frames on the > network. All NICs and switches are supposed to support that, however > on some systems the communication of the FD to the SD stops as soon as > I change on the FD the MTU from the default of 1500 to a higher value > (9000). The MTU on the DIR and SD can be set to 9000 without visible > impact on bacula. Are all of the machines on the same subnet? If not, you'll also have to check the MTU on all of your local router interfaces. -- Frank Sweetser fs at wpi.edu| For every problem, there is a solution that Manager of Network Operations | is simple, elegant, and wrong. Worcester Polytechnic Institute | - HL Mencken -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
On 01/06/12 11:30, Wolfgang Denk wrote: > Hello, > > I know that this is not exactly related to Bacula, but maybe some > other user has seen similar behaviour. > > I have problems when trying to enable support for jumbo frames on the > network. All NICs and switches are supposed to support that, however > on some systems the communication of the FD to the SD stops as soon as > I change on the FD the MTU from the default of 1500 to a higher value > (9000). The MTU on the DIR and SD can be set to 9000 without visible > impact on bacula. > > Funny thing is that this happens not on all systems. > > Does this ring a bell somewhere? > > Thanks in advance. > > Best regards, > > Wolfgang Denk > Hi Wolfgang I have only seen issues like this when some device along the path is not properly supporting jumbo frames. Sometimes a device will require a reboot to make the jumbo frames setting take affect. I have seen this with DELL switches, for instance. A quick (non-bacula) way to test is to ssh from one machine to the other and run a find / command or something that will generate similar amount of output. If jumbo frames are not enabled on the whole path, then this output will appear to "just hang" and you will no longer have connectivity to the system. It is also possible that some of the NICs in your servers are not properly supporting the higher MTU that you are setting. Hope this helps. -- Bill Arlofski Reverse Polarity, LLC -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
Re: [Bacula-users] Problems with Jumbo packets?
Some Network card are supposed to "support" Jumbo frames but not as high value as 9000 octets. I remember I had issues with some broadcom NIC that couldn't go further than 7200. Maybe you could take a look at the NIC on the impacted hosts regards Le 06/01/2012 17:30, Wolfgang Denk a écrit : Hello, I know that this is not exactly related to Bacula, but maybe some other user has seen similar behaviour. I have problems when trying to enable support for jumbo frames on the network. All NICs and switches are supposed to support that, however on some systems the communication of the FD to the SD stops as soon as I change on the FD the MTU from the default of 1500 to a higher value (9000). The MTU on the DIR and SD can be set to 9000 without visible impact on bacula. Funny thing is that this happens not on all systems. Does this ring a bell somewhere? Thanks in advance. Best regards, Wolfgang Denk -- Alexandre Chapellon Ingénierie des systèmes open sources et réseaux. Follow me on twitter: @alxgomz -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
[Bacula-users] Problems with Jumbo packets?
Hello, I know that this is not exactly related to Bacula, but maybe some other user has seen similar behaviour. I have problems when trying to enable support for jumbo frames on the network. All NICs and switches are supposed to support that, however on some systems the communication of the FD to the SD stops as soon as I change on the FD the MTU from the default of 1500 to a higher value (9000). The MTU on the DIR and SD can be set to 9000 without visible impact on bacula. Funny thing is that this happens not on all systems. Does this ring a bell somewhere? Thanks in advance. Best regards, Wolfgang Denk -- DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: w...@denx.de This restaurant was advertising breakfast any time. So I ordered french toast in the renaissance.- Steven Wright, comedian -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
