From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Thu Dec 04 2003 - 13:15:02 GMT-3
<Quote>
If you don't trust your service provider and provide a "just in case"
option, then it becomes CIR and you'll still back off to something lower
than that.
</Quote>
When shaping to the agreed upon CIR, there should not be a need to
drop to a rate lower than the CIR. If you are not getting the rate you are
paying for, don't just lower your rate. Your "just in case" option should
be to contact the frame relay service provider and have them correctly
provision your DLCIs ;-)
Disclaimer:
Of course you could theoretically have a lab scenario written by someone
that didn't understand FRTS and maybe they would asked something like this
;-)
Brian Dennis, CCIE #2210 (R&S/ISP-Dial/Security)
bdennis@internetworkexpert.com
Toll Free: 877-224-8987
Direct: 775-745-6404 (Outside the US and Canada)
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Scott Morris
Sent: Thursday, December 04, 2003 4:31 AM
To: 'Pun, Alec CL'; ccielab@groupstudy.com
Subject: RE: FR CIR ??
As with everything else, it depends on your perspective!
Guaranteed traffic is the bare minimum that you can push through the
circuit, that your provider says will go through because you pay for it.
It's the MinCIR from a purely theorhetical throughput scenario.
Although if you aren't required to pay attention to BECNs and do any
sort of backoff, it becomes your CIR. If you don't trust your service
provider and provide a "just in case" option, then it becomes CIR and
you'll still back off to something lower than that.
If your link capacity is 128K, that is most likely your Access Rate, or
full link speed. This is useful to know for the bandwidth command if
you are doing any queuing stuff. It's also useful for calculating your
be information in FRTS.
Now, of course, there is always the human factor of it depends on who
wrote the lab and what they were thinking. Check your lab diagrams for
any information about clocking speeds of serial lines (hence your AR).
Or, if in doubt of whether the "link capacity" means AR or not, ask the
proctor. They are there to help!
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
CISSP, JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Pun, Alec CL
Sent: Thursday, December 04, 2003 3:52 AM
To: ccielab@groupstudy.com
Subject: FR CIR ??
If the question mentioned "The FR service provider is guaranteeing
32kbps of traffic", would you intepret as CIR or minCIR ? How about "FR
access being provided by the service provider has a link capacity of
128kbps" ? Sometimes I am confused by the terms which one should be
used.
thanks
alec
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