Re: (ASCEND) TNT HDLC/modem resource allocation

["William R. Charnock" <charnock@fastlane.net>]

Wow -- that is bizarre -- you can't automatically route a digital call to
an HDLC card if it sits below the Series56-II cards in the chassis?

--
William Charnock
CTO, FastLane Internet Services
(817)-429-5263
netadmin@fastlane.net

On Tue, 9 Mar 1999, Peter Lalor wrote:

> >From: Matt Holdrege <matt@ascend.com>
> >
> >At 11:09 AM 3/5/99 -0800, Peter Lalor wrote:
> >>We have a TNT with an HDLC card and a Series II modem card, which also has
> >>HDLC processors in it. The Series II modem card can handle 48 modem or ISDN
> >>calls, in any mix, but no more than 48.
> >>
> >>When I set call-routing-sort-method and digital-call-routing-sort-method to
> >>item-first, the TNT uses up the HDLC processors on the modem card first,
> >>which causes us to run out of modems while having excessive free HDLC
> >>processors.
> >
> >The call routing algorithms that can be applied to digital and analog calls
> >are the same.  However, the defaults are reversed.
> >
> >>From the System Profile:
> > Parameter - call-routing-sort-method:
> >  How to sort the Call Routing table for analog calls.
> > Parameter - digital-call-routing-sort-method:
> >  How to sort the Call Routing table for digital calls.
> >
> >  Enumerated field, values:
> >   Analog Default:
> >    item-first:  Sort by item number, then shelf and slot number. Tends to
> >       distribute incoming calls evenly across multiple host cards.
> >   Digital Default:
> >    slot-first:  Sort by shelf and slot number, then item number. Tends to
> >       concentrate incoming calls on one host card at a time.
> >
> >By following the above rules, putting the HDLC card(s) above the CSM3
> >card(s) in the first TNT Shelf and setting the SYSTEM Profile parameter
> >DIGITAL-CALL-ROUTING-SORT-METHOD equal to SLOT-FIRST the calls 'should'
> >fill the HDLC card(s) before incoming digital calls roll over to a CSM3.  I
> >use the word 'should' only because I've not tried this in the lab.
> 
> Silly me, I went and put the CSM3 card in slot 1. I'll try moving it below
> the HDLC card, say to slot 16, so the only thing below it is the floor
> below. That should help.
> 
> We need a list of where cards should be installed in relation to other
> cards. Evidently, there can be pitfalls to just sticking things in an
> available slot.
> 
> Of course, I'd rather I could allocate resources by card type in software...
> 
> Peter Lalor           Infoasis
> plalor@infoasis.com   http://www.infoasis.com/
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