Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!magnus.acs.ohio-state.edu!csn!boulder!daemon From: William "Chops" Westfield Newsgroups: comp.dcom.sys.cisco Subject: Re: Terminal server hangs Message-ID: <35110@boulder.Colorado.EDU> Date: 15 May 91 23:50:41 GMT Sender: daemon@boulder.Colorado.EDU Lines: 21 We've had and are still having the problem. We run csc/2s with 8.1 (14) software. I don't think we've ever had it hang for up to 2 minutes, but definitely 30 seconds. This is probably a different bug. 8.1(14) had a bug in the SWS avoidance code that would cause pauses on large outputs from certain TCP implementations (notably SUNOS 4.1, but not SUNOS 4.0). This was fixed in 8.1(25) and remains fixed in the current release. There is also a workaround - lower the ethernet MTU to 1064 or so. (What happened was tha SUNOS started actually sending packets of 1460 bytes, instead of 1024 bytes (of data). The cisco's TCP window is 2144, and the SWS avoidance bug creeps in when two full packets don't fit in the window...) The MAP/Richley problem is almost certainly different - apparently the pauses are box wide rather than per connection... Bill Westfield cisco Systems. -------