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From: my@dtg.nsc.com (Michael Yip)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: FDDI Dual-Homing SAS Attachments
Keywords: FDDI, Dual-homing, Concentrator, SAS, DAS
Message-ID: <1524@parrot.nsc.com>
Date: 16 Nov 90 02:04:46 GMT
References: <29820@boulder.Colorado.EDU>
Reply-To: my@parrot.UUCP (Michael Yip)
Organization: National Semiconductor, Santa Clara
Lines: 16

I think that when a DAS connect any off its two (A/B) Ports to
a concentrator(s), the B Port will be the main one while the
A Port will be a hot stand by.  Meaning that when both Ports
are physically connected to the concentrator and only one is
Active (use to transfer frames).  If the B Port is unable to 
connect for any reason, the A Port will try to connect.

Any FDDI Dual Attached Station should do that, not just a CISCO
FDDI router.  I think that it is in the FDDI ANSI spec, in the
PCM section of CMT section of SMT document.

I am not sure what Jose's question is since he basically just
stated the situation.  ;)

-- Mike
   my@dtg.nsc.com