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- Xref: sparky comp.sys.sequent:461 comp.sys.unisys:418
- Newsgroups: comp.sys.sequent,comp.sys.unisys
- Path: sparky!uunet!elroy.jpl.nasa.gov!wvus!pete
- From: pete@wvus.org (Pete Gregory)
- Subject: multiple SCEDs on one LAN
- Organization: World Vision U.S.
- Date: Wed, 22 Jul 92 14:03:52 GMT
- Message-ID: <1992Jul22.140352.24997@wvus.org>
- Lines: 36
-
- Hi - PTX 1.1.1 here on 3xS27's + 2xS81's...
-
- One of our S81's has enough tcp connections that we've had to buy a second
- SCED card (each SCED card will carry up to 256 tcp connections, a hard
- limit). We want to put it on the same LAN as the first, as our entire
- organization operates on one big LAN (composed of 400 PC's, 30 UNIX
- workstations, 6 UNIX mainframes, and numerous printer servers). The idea
- here is that some people would telnet to the first SCED card, and others to
- the second SCED card, thereby distributing the tcp-connections load evenly
- among the two SCED cards and avoiding problems by overflowing one or the
- other.
-
- When the two SCED cards' IP addresses are set to be 89.0.0.5 and 89.0.0.40,
- the second SCED card end up transmitting ALL outbound packets; netstat -i
- looks like this:
-
- Name Mtu Network Address Ipkts Opkts Odrop
- loop 1536 loopback-ne loopback 0 0 0
- se1 1500 89.0.0.5 john2 664420 1480083 0
- se0 1500 89.0.0.40 john 1347890 0 0
-
- ...as you can see, the first SCED card sends no outbound packets; hence,
- the second SCED card ends up trying to carry > 255 tcp connections.
-
- Something else I've tried: using IP addresses on different network numbers
- (ie. 89.0.0.5 and 88.0.0.40), but we can't reach the 2nd SCED card, even
- when I manually put entries for the 2nd SCED card in all machines' ARP
- tables.
-
- Bottom line question: how does one configure 2-SCEDs-on-1-LAN system ???
- Unisys (our OEM vendor) hasn't been much help.
- --
-
- Pete Gregory | Internet: pete@wvus.org
- UNIX SA | Bangpath: ames!elroy!wvus!pete
- World Vision U.S. | Slowpath: 919 W. Huntington Dr., Monrovia, CA 91016
-