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- Path: sparky!uunet!news.tek.com!gvgpsa!ssigv!sunrise!gdonl
- From: gdonl@sunrise.ssi1.com (Don Lewis)
- Newsgroups: comp.sys.apollo
- Subject: Apollo TCP woes
- Message-ID: <1992Dec17.002418.6709@ssigv.UUCP>
- Date: 17 Dec 92 00:24:18 GMT
- Sender: news@ssigv.UUCP
- Organization: Silicon Systems, Nevada City CA
- Lines: 28
- Nntp-Posting-Host: sunrise
-
- We are experiencing some severe problems with TCP/IP under DomainOS 10.3.5
- on Apollo DN5500, 425s, 425t, and 433s nodes.
-
- Rlogin connections from a node on the token ring to HP 700 and Sun
- nodes nodes on our ethernet using an Apollo as a TCP/IP router between
- the networks are occasionally dropped. It appears that the Apollo being
- used as a router is sending an ICMP {NET,HOST} UNREACHABLE to to the token
- ring only node, which then drops the connection. We aren't real sure since
- we don't have a way to sniff packets on the token ring. We haven't yet
- seen anything suspicious on the ethernet. The router node shouldn't be
- sending these packets, since it is directly attached to both networks.
- The other node should not drop an existing connection upon the receipt of
- an ICMP UNREACHABLE since this may be a transient condition.
-
- Our ethernet currently carries packets for two IP networks. The Apollo
- nodes on both the ethernet and the token ring see broadcast packets for
- the other IP network and forward them to their gateway for this network.
- The directed broadcast flag (-b) on tcpd is not enabled.
-
- The TCP/IP software occasionally seems to go semi-catatonic. If the
- node is acting is a router, it continues to broadcast routing updates,
- but it can't be pinged. It may come back to life after a while, or
- the node may have to be rebooted. This problem may only happen on the
- token ring side.
- --
- Don "Truck" Lewis Phone: +1 916 478-8284 Silicon Systems
- Internet: gdonl@ssi1.com FAX: +1 916 478-8290 138 New Mohawk Road
- UUCP: {uunet,tektronix!gvgpsa.gvg.tek.com}!ssigv!gdonl Nevada City, CA 95959
-