RE: ATM-AToM

Dear Tyson,
 
I have a doubt about some issue : wouldn't you think that the IP-DSLAM would terminate the OAM LOOpback Messages at the Ethernet Uplink port TO the PE Router?
 
I hope to give me a solution for this Issue as The DSLAM Connected To ATM through the Customer and Ethernet Link To The PE Router,this is why we have a Problem as We before we migrate from ATM DSLAM to IP DSLAM,there wasn't any problem.
 
 
 
ThANKS,
Osama
 
> From: tscott_at_ipexpert.com
> To: tetoo_me_at_hotmail.com; dcp_at_dcptech.com; ccielab_at_groupstudy.com
> Subject: RE: ATM-AToM
> Date: Thu, 13 Jan 2011 12:12:53 -0500
>
> You are trying to perform the role of the CE in this. The CE needs to do
> OAM between CE locations and make routing decisions based on the best path,
> This is not the role of the provider in this scenario to decide how to
> forward traffic over the two paths. That is the role of the customer.
>
>
>
> Regards,
>
>
>
> Tyson Scott - CCIE #13513 R&S, Security, and SP
> Managing Partner / Sr. Instructor - IPexpert, Inc.
> Mailto: tscott_at_ipexpert.com
>
>
>
>
>
> From: Mohamed Osama [mailto:tetoo_me_at_hotmail.com]
> Sent: Thursday, January 13, 2011 11:56 AM
> To: dcp_at_dcptech.com; tscott_at_ipexpert.com; Cisco certification
> Subject: RE: ATM-AToM
>
>
>
> Dear All,
>
>
>
> Yes thats True and CE want Us To Provide Him with Another Layer 2 circuit so
> that in this case CE will be Connected to our PE1 with 2 Layer 2 Circuits on
> Separate 2 ATM interfaces on PE1 router and For Sure our PE1 will have
> xconnect to the other End PE2.
>
>
>
> In My scenario,I'm talking about the Layer 2 circuit,How I can Detect if the
> ATM Layer 2 Circuit between PE and CE is UP or Down,
>
> and if it's Down,how can i provision the Other Layer 2 Circuit to be used
> For AToM Layer 2 VPN,and if both up how load balance and load sharing will
> be down.
>
>
>
> Its similar to the case when having 2 static Route under VRF with Tracking
> IP SLA but this for LAyer 3 customer which is Using Routing not LAyer 2 vpn
> :) ---------- I said this as an example Just to clear my point :D
>
>
>
> Thanks,
>
> Osama
>
> > From: dcp_at_dcptech.com
> > To: tetoo_me_at_hotmail.com; tscott_at_ipexpert.com; ccielab_at_groupstudy.com
> > Subject: RE: ATM-AToM
> > Date: Thu, 13 Jan 2011 11:38:54 -0500
> >
> > AToM requires the PE's to have L3 connectivity. The PE/CE connection is
> L2.
> > On the PE ATM interface you will have "xconnect 1.1.1.1 100 encap mpls"
> > where 1.1.1.1 is the loopback on the other PE.
> >
> > David
> >
> > --
> > http://dcp.dcptech.com
> >
> >
> > > -----Original Message-----
> > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> > > Mohamed Osama
> > > Sent: Thursday, January 13, 2011 11:02 AM
> > > To: tscott_at_ipexpert.com; Cisco certification
> > > Subject: RE: ATM-AToM
> > >
> > > Dear Tyson,
> > > what if there is no layer 3 information between PE Router and the
> > > customer Router,only layer 2 ATM circuit and we are offering them 2
> > > Layer 2 AToM circuit for redundancy.
> > > How can i do that??beside i can't do any changes at the Customer
> > > Router.
> > > I appreciate helping me in this case.
> > > Thanks,Osama
> > >
> > > > From: tscott_at_ipexpert.com
> > > > To: tetoo_me_at_hotmail.com; ccielab_at_groupstudy.com
> > > > Subject: RE: ATM-AToM
> > > > Date: Thu, 13 Jan 2011 10:26:02 -0500
> > > >
> > > > If the OAM loopback responses are lost then the PVC goes down which
> > > will
> > > > force the traffic in the other direction. I am under the presumption
> > > you
> > > > have some L3 traffic running across the connection. Simply routing
> > > of the
> > > > connection between the sites should do. I am under the hope that you
> > > > designed this terminating the AToM with Loopbacks as the
> > > source/destination
> > > > allowing simply routing protocol path preference to decide the path
> > > to take.
> > > >
> > > >
> > > >
> > > > Regards,
> > > >
> > > >
> > > >
> > > > Tyson Scott - CCIE #13513 R&S, Security, and SP
> > > > Managing Partner / Sr. Instructor - IPexpert, Inc.
> > > > Mailto: tscott_at_ipexpert.com
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > From: Mohamed Osama [mailto:tetoo_me_at_hotmail.com]
> > > > Sent: Thursday, January 13, 2011 10:20 AM
> > > > To: tscott_at_ipexpert.com; Cisco certification
> > > > Subject: RE: ATM-AToM
> > > >
> > > >
> > > >
> > > > Dear Tyson,
> > > >
> > > >
> > > >
> > > > Thanks For Your Valuable Information,
> > > >
> > > > But How can i use It To monitor and Manage The Customer Layer 2 VPN
> > > Circuit,
> > > >
> > > > so that if The First AToM layer 2 VPN circuit can Detect its Down,
> > > >
> > > >
> > > >
> > > > then Can Utilize The Other Layer 2 VPN Link To be Active In The Layer
> > > 2
> > > > AToM?
> > > >
> > > >
> > > >
> > > > Any Advices About This?what configurations should be applied to the
> > > Router
> > > > to Solve that?
> > > >
> > > >
> > > >
> > > > I appreciate Your Response
> > > >
> > > >
> > > >
> > > > Thanks,
> > > >
> > > > Osama
> > > >
> > > > > From: tscott_at_ipexpert.com
> > > > > To: tetoo_me_at_hotmail.com; ccielab_at_groupstudy.com
> > > > > Subject: RE: ATM-AToM
> > > > > Date: Thu, 13 Jan 2011 09:22:34 -0500
> > > > >
> > > > > It is called OAM management.
> > > > >
> > > >
> > > http://www.cisco.com/en/US/tech/tk39/tk51/technologies_q_and_a_item0918
> > > 6a008
> > > > > 0111154.shtml
> > > > >
> > > > >
> > > > > Regards,
> > > > >
> > > > > Tyson Scott - CCIE #13513 R&S, Security, and SP
> > > > > Managing Partner / Sr. Instructor - IPexpert, Inc.
> > > > > Mailto: tscott_at_ipexpert.com
> > > > >
> > > > >
> > > > > -----Original Message-----
> > > > > From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On
> > > Behalf Of
> > > > > Mohamed Osama
> > > > > Sent: Thursday, January 13, 2011 6:49 AM
> > > > > To: Cisco certification
> > > > > Subject: ATM-AToM
> > > > >
> > > > > Dear Experts,
> > > > >
> > > > > Can you please help me with this issue :)
> > > > >
> > > > > I need to monitor the status of Layer 2 Circuit Carrying ATom-
> > > ATM,because
> > > > > the Customer is connected with two layer 2 links through ATM/DSLAM
> > > to our
> > > > PE
> > > > > Router.
> > > > > I need to find a way so that i can monitor the Status of Layer 2
> > > LINK
> > > > > carring AToM to Be able to Utlize the Primary link and Backup Link.
> > > > >
> > > > > CPE------two Links-----ATM DSLAM---------Two Links-------PE
> > > > >
> > > > > Kindly notes i can't monitor the Status of Interfaces because the
> > > DSLAM
> > > > > doesnt provide it and we need to check layer 2 end to end.
> > > > >
> > > > > Any Mechanism To Provide that Solution?
> > > > >
> > > > > thanks,
> > > > > Osama
> > > > >
> > > > >
> > > > > Blogs and organic groups at http://www.ccie.net
> > > > >
> > > > >
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Received on Sun Jan 16 2011 - 12:33:11 ART