i have spent the last 5 hours searching for some post/blog/experience on VDE Xen combo. but to no avail. VDE seems to be popular with KVM and other non virtualized environments . Are there ways to use it with Xen, i mean, transparently connect a set of DomUs in different physical hosts in different networks , to form one virtual network? If this cannot be done at Dom0 side, it always can be done at the DomU side, where the domu plugs into a vde switch. But are there any ballpark stats on the performance drops? to put things in a nut shell, I am looking for some decent solution (with acceptable levels of performance loss) to form a virtual network of DomUs that are spread across physical machines, across physical networks (some behind nats/firewalls). is vlan the way to go?how? thanks r _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Hi all, did somebody made successfull tests with NPIV? if yes with Qlogic and Emulex adapters? Mit freundlichen Grüßen / with kind regards Gerhard Possler IT Architect IBM Enterprise Linux Services ELS Wiki@IBM (only accessible via IBM intranet) IT-Services and Solutions GmbH Rathausstr. 7, D-09111 Chemnitz Geschäftsführung: Rainer Laier, Michael Mai Sitz der Gesellschaft: Chemnitz Registergericht: Amtsgericht Chemnitz, HRB 18409 http://www.itsas.de/ gerhard.possler@de.ibm.com Mobil +49 (0) 160 90578637 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
virtual distributed ethernet Todd Deshane wrote:> what is VDE? > > On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu > <mailto:shriram@cs.ucsb.edu>> wrote: > > i have spent the last 5 hours searching for some > post/blog/experience on > VDE Xen combo. but to no avail. > > VDE seems to be popular with KVM and other non virtualized > environments > . Are there ways to use it with Xen, i mean, transparently connect a > set of DomUs in different physical hosts in different networks , to > form one virtual network? > > If this cannot be done at Dom0 side, it always can be done at the DomU > side, where the domu plugs into a vde switch. But are there any > ballpark > stats on the performance drops? > > to put things in a nut shell, I am looking for some decent solution > (with acceptable levels of performance loss) to form a virtual network > of DomUs that are spread across physical machines, across physical > networks (some behind nats/firewalls). > is vlan the way to go?how? > > thanks > r > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com <mailto:Xen-users@lists.xensource.com> > http://lists.xensource.com/xen-users > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
RumbelStelskin wrote:> virtual distributed ethernet > > > Todd Deshane wrote: >> what is VDE? >> >> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >> <mailto:shriram@cs.ucsb.edu>> wrote: >> >> i have spent the last 5 hours searching for some >> post/blog/experience on >> VDE Xen combo. but to no avail. >> >> VDE seems to be popular with KVM and other non virtualized >> environments >> . Are there ways to use it with Xen, i mean, transparently connect a >> set of DomUs in different physical hosts in different networks , to >> form one virtual network? >> >> If this cannot be done at Dom0 side, it always can be done at the >> DomU >> side, where the domu plugs into a vde switch. But are there any >> ballpark >> stats on the performance drops? >> >> to put things in a nut shell, I am looking for some decent solution >> (with acceptable levels of performance loss) to form a virtual >> network >> of DomUs that are spread across physical machines, across physical >> networks (some behind nats/firewalls). >> is vlan the way to go?how? >> >> thanks >> r >>This is how I would go about it: Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. eth0.1. Then you would edit the Xen config to use that interface rather than the default eth0, in bridge mode of course (the default?). Do the same on all your Dom0s and you have a shared DomU network. For security you should restrict which ports on your switch can use your VLAN ID, i.e. the ones with Xen servers! You will then have to decide how to connect the VLAN to the outside world, via a DomU with acting as a router or via a physical router on your network. Simon _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
yes, but this arrangement would create a vlan inside a single host (or am i wrong?).. what if i want to vlanify domUs in different hosts (hosts in different subnets too)? and with the added complexity of several such disparate vlans in this network of xen hosts Simon Capstick wrote:> RumbelStelskin wrote: >> virtual distributed ethernet >> >> >> Todd Deshane wrote: >>> what is VDE? >>> >>> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >>> <mailto:shriram@cs.ucsb.edu>> wrote: >>> >>> i have spent the last 5 hours searching for some >>> post/blog/experience on >>> VDE Xen combo. but to no avail. >>> >>> VDE seems to be popular with KVM and other non virtualized >>> environments >>> . Are there ways to use it with Xen, i mean, transparently >>> connect a >>> set of DomUs in different physical hosts in different networks >>> , to >>> form one virtual network? >>> >>> If this cannot be done at Dom0 side, it always can be done at >>> the DomU >>> side, where the domu plugs into a vde switch. But are there any >>> ballpark >>> stats on the performance drops? >>> >>> to put things in a nut shell, I am looking for some decent solution >>> (with acceptable levels of performance loss) to form a virtual >>> network >>> of DomUs that are spread across physical machines, across physical >>> networks (some behind nats/firewalls). >>> is vlan the way to go?how? >>> >>> thanks >>> r >>> > > This is how I would go about it: > Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. > eth0.1. Then you would edit the Xen config to use that interface > rather than the default eth0, in bridge mode of course (the > default?). Do the same on all your Dom0s and you have a shared DomU > network. For security you should restrict which ports on your switch > can use your VLAN ID, i.e. the ones with Xen servers! You will then > have to decide how to connect the VLAN to the outside world, via a > DomU with acting as a router or via a physical router on your network. > > Simon_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
RumbelStelskin wrote:> yes, but this arrangement would create a vlan inside a single host (or > am i wrong?).. > what if i want to vlanify domUs in different hosts (hosts in different > subnets too)? > and with the added complexity of several such disparate vlans in this > network of xen hosts > > > Simon Capstick wrote: >> RumbelStelskin wrote: >>> virtual distributed ethernet >>> >>> >>> Todd Deshane wrote: >>>> what is VDE? >>>> >>>> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >>>> <mailto:shriram@cs.ucsb.edu>> wrote: >>>> >>>> i have spent the last 5 hours searching for some >>>> post/blog/experience on >>>> VDE Xen combo. but to no avail. >>>> >>>> VDE seems to be popular with KVM and other non virtualized >>>> environments >>>> . Are there ways to use it with Xen, i mean, transparently >>>> connect a >>>> set of DomUs in different physical hosts in different networks >>>> , to >>>> form one virtual network? >>>> >>>> If this cannot be done at Dom0 side, it always can be done at >>>> the DomU >>>> side, where the domu plugs into a vde switch. But are there any >>>> ballpark >>>> stats on the performance drops? >>>> >>>> to put things in a nut shell, I am looking for some decent solution >>>> (with acceptable levels of performance loss) to form a virtual >>>> network >>>> of DomUs that are spread across physical machines, across physical >>>> networks (some behind nats/firewalls). >>>> is vlan the way to go?how? >>>> >>>> thanks >>>> r >>>> >> >> This is how I would go about it: >> Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. >> eth0.1. Then you would edit the Xen config to use that interface >> rather than the default eth0, in bridge mode of course (the >> default?). Do the same on all your Dom0s and you have a shared DomU >> network. For security you should restrict which ports on your switch >> can use your VLAN ID, i.e. the ones with Xen servers! You will then >> have to decide how to connect the VLAN to the outside world, via a >> DomU with acting as a router or via a physical router on your network. >> >> Simon >The Xen created network bridge attached to the VLAN interface on Dom0 (not eth0) sends the appropriate traffic out to your physical network switch. It is my understanding that the VLAN interface is simply tagging packets and then sending them on over the specified physical interface (and receiving the correctly VLAN tagged packets too). Assuming you have set-up your switch correctly and other Dom0s with the same config then they should be able to communicate. Of course reality may bite, and you may find problems with VLANs and Xen as discussed in posts in the list archive. But I assume the problems are now gone, or there are workarounds. Simon _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Ah, i forgot to mention an important constraint. Assuming that this garden of vlans is going to be created in a network of xen hosts, with one switch and (I dont have administrative access /any access at all to the switch), I would be looking for a switch emulator to do the vlan trunking something on the lines of VDE, Serval , etc . Have you or anybody for that matter had any experience with such software switch emulators (Serval sounds interesting) Simon Capstick wrote:> RumbelStelskin wrote: >> yes, but this arrangement would create a vlan inside a single host (or >> am i wrong?).. >> what if i want to vlanify domUs in different hosts (hosts in different >> subnets too)? >> and with the added complexity of several such disparate vlans in this >> network of xen hosts >> >> >> Simon Capstick wrote: >>> RumbelStelskin wrote: >>>> virtual distributed ethernet >>>> >>>> >>>> Todd Deshane wrote: >>>>> what is VDE? >>>>> >>>>> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >>>>> <mailto:shriram@cs.ucsb.edu>> wrote: >>>>> >>>>> i have spent the last 5 hours searching for some >>>>> post/blog/experience on >>>>> VDE Xen combo. but to no avail. >>>>> >>>>> VDE seems to be popular with KVM and other non virtualized >>>>> environments >>>>> . Are there ways to use it with Xen, i mean, transparently >>>>> connect a >>>>> set of DomUs in different physical hosts in different >>>>> networks , to >>>>> form one virtual network? >>>>> >>>>> If this cannot be done at Dom0 side, it always can be done at >>>>> the DomU >>>>> side, where the domu plugs into a vde switch. But are there any >>>>> ballpark >>>>> stats on the performance drops? >>>>> >>>>> to put things in a nut shell, I am looking for some decent >>>>> solution >>>>> (with acceptable levels of performance loss) to form a virtual >>>>> network >>>>> of DomUs that are spread across physical machines, across >>>>> physical >>>>> networks (some behind nats/firewalls). >>>>> is vlan the way to go?how? >>>>> >>>>> thanks >>>>> r >>>>> >>> >>> This is how I would go about it: >>> Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. >>> eth0.1. Then you would edit the Xen config to use that interface >>> rather than the default eth0, in bridge mode of course (the >>> default?). Do the same on all your Dom0s and you have a shared DomU >>> network. For security you should restrict which ports on your >>> switch can use your VLAN ID, i.e. the ones with Xen servers! You >>> will then have to decide how to connect the VLAN to the outside >>> world, via a DomU with acting as a router or via a physical router >>> on your network. >>> >>> Simon >> > > The Xen created network bridge attached to the VLAN interface on Dom0 > (not eth0) sends the appropriate traffic out to your physical network > switch. It is my understanding that the VLAN interface is simply > tagging packets and then sending them on over the specified physical > interface (and receiving the correctly VLAN tagged packets too). > Assuming you have set-up your switch correctly and other Dom0s with > the same config then they should be able to communicate. > > Of course reality may bite, and you may find problems with VLANs and > Xen as discussed in posts in the list archive. But I assume the > problems are now gone, or there are workarounds. > > Simon > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Shriram Rajagopalan wrote:> Ah, i forgot to mention an important constraint. Assuming that this > garden of vlans is going to be created in a network of xen hosts, with > one switch and (I dont have administrative access /any access at all to > the switch), I would be looking for a switch emulator to do the vlan > trunking > something on the lines of VDE, Serval , etc . > > Have you or anybody for that matter had any experience with such > software switch emulators (Serval sounds interesting) > > Simon Capstick wrote: >> RumbelStelskin wrote: >>> yes, but this arrangement would create a vlan inside a single host (or >>> am i wrong?).. >>> what if i want to vlanify domUs in different hosts (hosts in different >>> subnets too)? >>> and with the added complexity of several such disparate vlans in this >>> network of xen hosts >>> >>> >>> Simon Capstick wrote: >>>> RumbelStelskin wrote: >>>>> virtual distributed ethernet >>>>> >>>>> >>>>> Todd Deshane wrote: >>>>>> what is VDE? >>>>>> >>>>>> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >>>>>> <mailto:shriram@cs.ucsb.edu>> wrote: >>>>>> >>>>>> i have spent the last 5 hours searching for some >>>>>> post/blog/experience on >>>>>> VDE Xen combo. but to no avail. >>>>>> >>>>>> VDE seems to be popular with KVM and other non virtualized >>>>>> environments >>>>>> . Are there ways to use it with Xen, i mean, transparently >>>>>> connect a >>>>>> set of DomUs in different physical hosts in different >>>>>> networks , to >>>>>> form one virtual network? >>>>>> >>>>>> If this cannot be done at Dom0 side, it always can be done at >>>>>> the DomU >>>>>> side, where the domu plugs into a vde switch. But are there any >>>>>> ballpark >>>>>> stats on the performance drops? >>>>>> >>>>>> to put things in a nut shell, I am looking for some decent >>>>>> solution >>>>>> (with acceptable levels of performance loss) to form a virtual >>>>>> network >>>>>> of DomUs that are spread across physical machines, across >>>>>> physical >>>>>> networks (some behind nats/firewalls). >>>>>> is vlan the way to go?how? >>>>>> >>>>>> thanks >>>>>> r >>>>>> >>>> >>>> This is how I would go about it: >>>> Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. >>>> eth0.1. Then you would edit the Xen config to use that interface >>>> rather than the default eth0, in bridge mode of course (the >>>> default?). Do the same on all your Dom0s and you have a shared DomU >>>> network. For security you should restrict which ports on your >>>> switch can use your VLAN ID, i.e. the ones with Xen servers! You >>>> will then have to decide how to connect the VLAN to the outside >>>> world, via a DomU with acting as a router or via a physical router >>>> on your network. >>>> >>>> Simon >>> >> >> The Xen created network bridge attached to the VLAN interface on Dom0 >> (not eth0) sends the appropriate traffic out to your physical network >> switch. It is my understanding that the VLAN interface is simply >> tagging packets and then sending them on over the specified physical >> interface (and receiving the correctly VLAN tagged packets too). >> Assuming you have set-up your switch correctly and other Dom0s with >> the same config then they should be able to communicate. >> >> Of course reality may bite, and you may find problems with VLANs and >> Xen as discussed in posts in the list archive. But I assume the >> problems are now gone, or there are workarounds. >> >> Simon >>The only (secure) way I can think of is to set-up a Linux VPN between all the Dom0s in a mesh arrangement. Very CPU intensive I would imagine. It would be much better to get hold of a physical switch you can manage. Alternatively cable directly between Dom0s using cross-over cables, lots of NICs and some routing on the Dom0s (not a nice solution). Simon _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Simon Capstick wrote:> Shriram Rajagopalan wrote: >> Ah, i forgot to mention an important constraint. Assuming that this >> garden of vlans is going to be created in a network of xen hosts, with >> one switch and (I dont have administrative access /any access at all >> to the switch), I would be looking for a switch emulator to do the >> vlan trunking >> something on the lines of VDE, Serval , etc . >> >> Have you or anybody for that matter had any experience with such >> software switch emulators (Serval sounds interesting) >> >> Simon Capstick wrote: >>> RumbelStelskin wrote: >>>> yes, but this arrangement would create a vlan inside a single host (or >>>> am i wrong?).. >>>> what if i want to vlanify domUs in different hosts (hosts in different >>>> subnets too)? >>>> and with the added complexity of several such disparate vlans in this >>>> network of xen hosts >>>> >>>> >>>> Simon Capstick wrote: >>>>> RumbelStelskin wrote: >>>>>> virtual distributed ethernet >>>>>> >>>>>> >>>>>> Todd Deshane wrote: >>>>>>> what is VDE? >>>>>>> >>>>>>> On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@cs.ucsb.edu >>>>>>> <mailto:shriram@cs.ucsb.edu>> wrote: >>>>>>> >>>>>>> i have spent the last 5 hours searching for some >>>>>>> post/blog/experience on >>>>>>> VDE Xen combo. but to no avail. >>>>>>> >>>>>>> VDE seems to be popular with KVM and other non virtualized >>>>>>> environments >>>>>>> . Are there ways to use it with Xen, i mean, transparently >>>>>>> connect a >>>>>>> set of DomUs in different physical hosts in different >>>>>>> networks , to >>>>>>> form one virtual network? >>>>>>> >>>>>>> If this cannot be done at Dom0 side, it always can be done at >>>>>>> the DomU >>>>>>> side, where the domu plugs into a vde switch. But are there any >>>>>>> ballpark >>>>>>> stats on the performance drops? >>>>>>> >>>>>>> to put things in a nut shell, I am looking for some decent >>>>>>> solution >>>>>>> (with acceptable levels of performance loss) to form a >>>>>>> virtual network >>>>>>> of DomUs that are spread across physical machines, across >>>>>>> physical >>>>>>> networks (some behind nats/firewalls). >>>>>>> is vlan the way to go?how? >>>>>>> >>>>>>> thanks >>>>>>> r >>>>>>> >>>>> >>>>> This is how I would go about it: >>>>> Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. >>>>> eth0.1. Then you would edit the Xen config to use that interface >>>>> rather than the default eth0, in bridge mode of course (the >>>>> default?). Do the same on all your Dom0s and you have a shared >>>>> DomU network. For security you should restrict which ports on your >>>>> switch can use your VLAN ID, i.e. the ones with Xen servers! You >>>>> will then have to decide how to connect the VLAN to the outside >>>>> world, via a DomU with acting as a router or via a physical router >>>>> on your network. >>>>> >>>>> Simon >>>> >>> >>> The Xen created network bridge attached to the VLAN interface on Dom0 >>> (not eth0) sends the appropriate traffic out to your physical network >>> switch. It is my understanding that the VLAN interface is simply >>> tagging packets and then sending them on over the specified physical >>> interface (and receiving the correctly VLAN tagged packets too). >>> Assuming you have set-up your switch correctly and other Dom0s with >>> the same config then they should be able to communicate. >>> >>> Of course reality may bite, and you may find problems with VLANs and >>> Xen as discussed in posts in the list archive. But I assume the >>> problems are now gone, or there are workarounds. >>> >>> Simon >>> > > The only (secure) way I can think of is to set-up a Linux VPN between > all the Dom0s in a mesh arrangement. Very CPU intensive I would imagine. > > It would be much better to get hold of a physical switch you can manage. > > Alternatively cable directly between Dom0s using cross-over cables, lots > of NICs and some routing on the Dom0s (not a nice solution). > > Simon >I should add that I haven''t used Serval [1], but it does look interesting. Simon [1] http://community.igalia.com/twiki/bin/view/Serval/WebOverview _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users