From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Wed May 03 2006 - 10:26:17 ART
Todd,
Think about it this way, what exactly are you trying to
accomplish by running OAM? You want to track the circuit status right?
If the circuit status is down what do you do? Are you polling it or
trapping it via SNMP? Other solutions come to mind such as the IP SLA
(RTR, SAA) that will allow you to accomplish the same thing. The main
difference is that you will be tracking the layer 3 status (i.e. IP
connectivity) instead of the layer 2 status. You can still trap or poll
these results via SNMP.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
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> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
> Todd.Osterberg@compucom.com
> Sent: Tuesday, May 02, 2006 11:08 PM
> To: ccielab@groupstudy.com
> Subject: SP Question
>
> I had a client experience an outage on two ATM DS3 circuits this
weekend
> and the telco did something very interesting. Both of these circuits
> have been up for nearly two years without any downtime. The telco's
> story is that one of their atm switches (lucent) was eating linecards
> and that the only card they had left had been installed and was
working.
> Well, our client still didn't have connectivity. More about these
> circuits... we're using frame-relay service interworking to support 22
> remote sites with frame and the head-end is ATM. Again, this has been
> working fine for nearly two years without any issue at all. So I do
> some debug and come to find out, the atm switch is no longer sending
OAM
> cells back to us. Turns out the line card that the telco installed
> didn't support OAM. Once the OAM config line was removed from 22
PVCs,
> things started to work just fine. So here is my real question...
>
>
>
> In a service interworking environment, how important is OAM? Since
> there isn't end-to-end ATM, does OAM really buy you anything? Mind
you,
> I've got a meeting set with the telco sales rep to discuss this
> situation. Neither my client, nor I am happy that we needed to change
> the clients config to help resolve a telco outage. Anyone else run
into
> a situation like this? Anyone else running OAM with service
> interworking?
>
>
>
>
>
> Todd
>
>
>
>
>
> Todd Allen Osterberg
> Senior Consultant, Professional Services US Western Region
>
> CompuCom
> eMail: todd.osterberg@compucom.com
> T: (916) 577-1066
> C: (916) 316-4650
> www.CompuCom.com
>
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> 7CF9A0000/exchweb/bin/redir.asp?URL=http://www.CompuCom.com>
>
>
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