From: Jongsoo kim (bstrt2002@gmail.com)
Date: Mon Apr 04 2005 - 16:56:19 GMT-3
See below
On Apr 4, 2005 2:55 PM, Roy Dempsey <roy.dempsey@gmail.com> wrote:
> Hi,
>
> I've had to return to a topic which I thought I knew, but which I've
> become confused about. I'm no ATM expert and my access to ATM
> equipment is limited so I'm hoping someone can help me gain some
> understanding on this topic. I have the following questions:
>
> 1. I think there are 4 possible ways to configure PPP over ATM.
> Under the assigned PVC:
> A. Protocol ppp virtual-template 1
> B. Protocol ppp dialer & dialer pool-member
> C. encapsulation aal5ciscoPPP virtual-template 1
> D. encapsulation aal5autoppp virtual-template 1
>
> Are there any others?
########## I understand all of above are compatible with each others.
> 2. For any of the above do you need to specify encapsulation ppp under
> the virtual-template? I think its the default but most examples show
> it configured. It would need to be added to the dialer interface,
> correct? ( Yes)
3. Are A and B locally significant only? In other words, can you
> configure either when configuring PPP over ATM, and both should work
> regardless of the other end. I don't think the other end should care
> whether a virtual-template or a dialer interface are configured but
> I'd like to check.
###### yes I understand dialer / ppp enc and VT are compatible.
4. If you're asked to configure PPP over ATM, I would assume that you
> are required to do either A or B above, as aal5ciscoPPP is a Cisco
> variation. Dangerous assumption?
### As I undertand all of them are compatible, it doesn't really matter
which one to use.
someone can collect me.
> 5. I have labbed all of the above apart from 4 up with no difficulty.
> However, in the lab one end would already be configured. Apart from
> using ilmi-pvc-discovery to find out the PVC and encapsulation
> information, are there any other useful debug commands.
For SVC,
"show atm ilmi-status" will show nsap address after pvc 0/16 ilmi , pvc 0/5
qsaal ans esi-address are configured.
6. I haven't seen any examples of aal5autoppp and when you would use
> it. Can someone explain it and when you would use it? Is is applicable
> to the R & S exam?
aal5autoppp is needed when you run PPPoA or PPPoE
Are there any other possible variations I should be aware of for the
> lab? Any other tips or potential pitfalls?
>
> Thanks
> Roy
>
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