Re: Single subnet

Dave Katz <katz@merit.edu> Sat, 19 May 1990 23:04 UTC

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Date: Sat, 19 May 90 18:02:51 EST
From: Dave Katz <katz@merit.edu>
Message-Id: <9005192302.AA20148@merit.edu>
To: deering@pescadero.stanford.edu
Subject: Re: Single subnet
Cc: fddi@merit.edu
Status: O

>  Will CLNP routers detect the wrap->thru transition and use
>  that to trigger a solicitation for ES Hellos?
 
Yes, in that IS-IS uses the loss of an IS on a subnetwork to trigger
this function.  However, asking for ES Hellos doesn't help get rid
of the ones you can't reach any more.  The spec calls for reducing
the remaining holding time on ES adjacencies, but when you add
it all up, it can take up to 239 (!) seconds to lose old ES
adjacencies.  These timers can be cranked down, however.