Re: (ASCEND) TNT HDLC/modem resource allocation

[Peter Lalor <plalor@infoasis.com>]

>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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