Are you using Active/Passive bond? (This is the bonding where only one NIC carries the traffic, others NICs are there just in case the first fails; in this case is normal other NICs stay as standby.)
XenServer provides support for both, Active/Passive and Active/Active (VM traffic balanced between bonded NICs). 2016-08-23 11:02 GMT-03:00 Alessandro Caviglione <[email protected]>: > Mmm... LACP provide load balancing so I should have 2 channel with 1 Gbps > throughput... > In fact, running this command from an XS server, I'm expecting to see both > NIC "working": > > time dd if=/dev/zero of=/var/run/sr-mount/UUID/testfile bs=4k > count=300000 > > But I see only 1 NIC with high traffic, the second one is in complete > standby! > > On Mon, Aug 22, 2016 at 11:31 PM, Marty Godsey <[email protected]> > wrote: > > > LACP does not provide more throughput but does provide more bandwidth. > > Basically if you have two 1G NICs in an LACP bond, you will not get a > > stream faster than 1G.. However, since you are not load balancing, you > can > > have MORE 1Gb streams. > > > > So what your seeing is normal. > > > > Also do a ovs-vsctl list port and a xe bond-list params=all to make sure > > your bonds are negotiating properly. > > > > > > Regards, > > Marty Godsey > > > > -----Original Message----- > > From: Alessandro Caviglione [mailto:[email protected]] > > Sent: Monday, August 22, 2016 4:02 PM > > To: [email protected] > > Subject: XenServer bond question > > > > Hi guys, > > pheraps I should post this question on Citrix forum but I think that here > > I can find a more "practical" answer based on similar infrastructure. :) > > I've a CS 4.6 with XS 6.2 clusters and here's my network config: > > > > - Management + Storage: 2 NIC LACP > > - Guest: 2 NIC LACP > > - Public: 2 NIC LACP > > > > All the "2 NIC" goes to a 2 stack switches with LACP configured. > > Now, here ( > > http://support.citrix.com/servlet/KbServlet/download/ > > 38321-102-714737/XenServer-6.5.0_Administrators%20Guide.pdf) > > I see: > > > > [...]Management interfaces > > > > You can bond a management interface to another NIC so that the second NIC > > provides failover for management traffic. Although configuring a LACP > link > > aggregation bond provides load balancing for management traffic, > > active-active NIC bonding does not.[...] > > > > Ok, great, this is exactly what I need to have. > > > > My issue is: in all XS I see only one NIC to make traffic during Storage > > Migration, I'm expecting that with LACP I see both NIC to make traffic, > but > > this does not happen. > > > > Do you have any experience on this topic? > > Since we're migrating to XS6.5 adding a new cluster and moving VM, do you > > have a better NIC configuration to suggest? > > > > Thank you very much! > > >
