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From: merike@helix.nih.gov (Merike Kaeo)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: FDDI Dual-Homing SAS Attachments
Keywords: FDDI, Dual-homing, Concentrator, SAS, DAS
Message-ID: <642@nih-csl.nih.gov>
Date: 16 Nov 90 13:55:03 GMT
References: <29820@boulder.Colorado.EDU> <1524@parrot.nsc.com>
Sender: news@nih-csl.nih.gov
Reply-To: merike@helix.nih.gov (Merike Kaeo)
Lines: 9

The FDDI ANSI spec does indeed specify that the thru mode should be
disabled and PHY B take precedence in a dual-homing situation.  However,
whether this is implemented correctly by the vendors is a valid concern.
I have heard rumors that as of now, no router vendor is implementing this 
properly but that this issue is being addressed.  I haven't had a chance
to test it out personally with our cisco routers because of lack of
concentrators and haven't heard yet from cisco directly.

Merike Kaeo