When dealing with the interaction of Sun and Cisco equipment, ensure the Sun connected ports are set to "Host" mode. (ie: disable arbitration for Channeling and Trunking)
The arbitration timeouts caused by the Cisco equipment attempting to arbitrate protocols which the Sun's know nothing about, causes nothing but headaches. Note: Cisco ships all equipment with all ports set to arbitrate everything. -----Original Message----- From: sunray-users-boun...@filibeto.org [mailto:sunray-users-boun...@filibeto.org] On Behalf Of Matthew Arensberg Wieben Sent: Thursday, September 27, 2012 3:54 PM To: SunRay-Users mailing list Subject: Re: [SunRay-Users] Performance tanks after upgrading to 1GB switch, had 100MB We use Cisco Catalyst 2970 switches for the servers...though in the client areas, 2960's and 2970's are used, too. There was a point in time where performance on the 2970's was really bad (video and everything else was very 'glitchy') unless forced compression on the DTUs was turned on. The servers connected to the 2970's are forced into 1gb mode, and everything else downstream is set to auto negotiate. No problem existed when the servers were connected to 2960's. When we first ran into the issue, I opened a ticket with Sun and Cisco about it (probably on this list, too). Sun gave a bunch of help...Cisco said, "ALP?--NOT US!" We basically did everything described in this thread: hires_tick = 1, turn off flow control, check switch logs for UDP buffer usage (ours weren't buffering UDP at all), using sunray gather, etc... the solution on our end just came down to leaving forced compression on since nothing seemed obviously wrong on the servers or switches. Over time, we did the usual sun ray server and firmware updates and network ops did their switch IOS updates and this problem just went away. Forced compression on or off, performance is just fine. Matt -----Original Message----- From: sunray-users-boun...@filibeto.org [mailto:sunray-users-boun...@filibeto.org] On Behalf Of Dave Price Sent: Thursday, September 27, 2012 11:11 AM To: SunRay-Users mailing list Subject: Re: [SunRay-Users] Performance tanks after upgrading to 1GB switch, had 100MB Dear Craig and All, We here at Aberystwyth have too suffered fairly bad sunray performance for a long time. [By the way, in the end I abandoned using Sunray with Solaris 11 as while I got it working, there were lots of niggling problems and time ran out...] I have the hires_tick set. I have the two servers [two T5140s] connected to ports on exactly the same switch as our class room of 40 SunRay 2 units. [I also have a handful of sunrays connected via another linked switch such as the one I am using as I type]. I allow the servers to auto-negotiate with the switch, but I tell the switch to only offer 100mbps full duplex as part of the auto-negotiate and indeed, that's how the two ports connecting to the T5140 servers are shown when I look at current state on the switchor on the servers. I have "wire frame" window moves set. The switch is a Dell PowerConnect 5448. The performance of screen interactivity can get quite poor when we have more than 20ish students using the system. The two T5140s are often still showing as 90%+ idle on all CPUs even though clicking windows in tools like netbeans or Oracle Studio or moving/clicking tabs in firefox can be very slow. We had a student earlier using a PC with Xming coming in via the "other" ports on the T5140s and reporting massively better performance than when using the SunRays. Does anyone use a Dell PowerConnect 5448? Does anyone have a list of known good/bad switches to use in a Sunray network? Any other bright ideas/suggestions? Thanks, Dave Price -- Dave Price, Email: d...@aber.ac.uk PHONE: +44 1970 622428 FAX: +44 1970 628536 Post: Computer Science, Aberystwyth University, Penglais, Aberystwyth, WALES, UK, SY23 3DB. _______________________________________________ SunRay-Users mailing list SunRay-Users@filibeto.org http://www.filibeto.org/mailman/listinfo/sunray-users _______________________________________________ SunRay-Users mailing list SunRay-Users@filibeto.org http://www.filibeto.org/mailman/listinfo/sunray-users _______________________________________________ SunRay-Users mailing list SunRay-Users@filibeto.org http://www.filibeto.org/mailman/listinfo/sunray-users
