RE: relationship of ChannelFail and Data Link FSM

[Jonathan Lang <jplang@calient.net>]

George,
  Yes.

thanks,
Jonathan

> -----Original Message-----
> From: George Young [mailto:george.young@edgeflow.com]
> Sent: Monday, September 10, 2001 10:52 AM
> To: Jonathan Lang
> Cc: ccamp@ops.ietf.org
> Subject: RE: relationship of ChannelFail and Data Link FSM
> 
> 
> Hello Jonathan,
> 
> Thanks for the clarification.
> 
> Does this mean there should be a transition in the Active 
> Data Link FSM
> Description from Up/Alloc to Down, triggered by a 'failure localized'
> event?
> 
> Regards,
> George.
> edgeflow Inc.
> 329 March Rd., Kanata, ON, Canada, K2K 2E1
> phone: +1 613-270-9279 Ext 287
> fax: +1 613-270-9268
> 
> 
> >-----Original Message-----
> >From: Jonathan Lang [mailto:jplang@calient.net]
> >Sent: Monday, September 10, 2001 1:13 PM
> >To: George Young; ccamp@ops.ietf.org
> >Subject: RE: relationship of ChannelFail and Data Link FSM
> >
> >
> >George,
> >  The upstream node should put the data link into the Down 
> state.  The
> >downstream node remains in the Up/Alloc state since it doesn't 
> >know if the
> >failure is with this particular link or if it is further 
> upstream.  The
> >reason to remain in up/alloc is that it may see restored 
> >traffic over the
> >link if the failure is repaired upstream.
> >
> >Thanks,
> >Jonathan
> >
> >> -----Original Message-----
> >> From: George Young [mailto:george.young@edgeflow.com]
> >> Sent: Friday, September 07, 2001 10:13 AM
> >> To: ccamp@ops.ietf.org
> >> Subject: relationship of ChannelFail and Data Link FSM
> >> 
> >> 
> >> Regarding ID draft-ietf-ccamp-lmp-00.txt, I have a 
> question about the
> >> ChannelFail message and the Data Link FSM. 
> >> 
> >> Firstly, my understanding is that when channel monitoring detects a
> >> failure, an LMP ChannelFail message is sent upstream, 
> relative to the
> >> direction of transmission. A node which receives this message 
> >> and knows
> >> via monitoring that its upstream link is ok has localized 
> >the failure.
> >> 
> >> My question is does this cause any state change in the 
> Data Link FSM,
> >> and if so, does it occur only in the node which localizes 
> >the failure,
> >> or all nodes which are aware of the failure. The current 
> FSM does not
> >> seem to address this.
> >> 
> >> Regards,
> >> George.
> >> edgeflow Inc.
> >> 329 March Rd., Kanata, ON, Canada, K2K 2E1
> >> phone: +1 613-270-9279 Ext 287
> >> fax: +1 613-270-9268
> >> 
> >> 
> >
>