RE: PPPoA Dialer <---> Virtual-Template

From: B Kim (beokim@comcast.net)
Date: Tue Jul 26 2005 - 11:51:15 GMT-3

Yes. You are right. When everything (encapsulation and virtual-access is
up, etc.) is correct over the PPPoA, as a result, each device will have
the /32 prefix of the remote. This host prefix is not needed if a subnet
is assigned on the link between two devices. But it doesn't hurt
anything in this case. And this is not specific issue with PPPoA. It is
issue with any PPP connection.

Thanks
B. Kim

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
robbie
Sent: Tuesday, July 26, 2005 9:20 AM
To: ccielab@groupstudy.com
Subject: Re: PPPoA Dialer <---> Virtual-Template

When you configure/build a PPP connection between two locations, IP
addresses are exchanged as part of the IPCP phase, if I recall
correctly. A router will add its neighbor's IP address as connected to
the global route table unless the 'no peer neighbor-route' command is
used in the PPP interface configuration. 

-- 
Cheers,
Robbie

ccie2be wrote:
> Functionally, the difference between using mux and snap is that snap
can
> encap multiple different protocols over a single circuit e.g. IPX and
IP.
> Mux can only encap a single protocol. More than that I don't know.
> 
> With regard to pinging with different ip subnets, recall that is a
function
> of ppp and ppp allows the local side to assign an ip address to the
remote
> side.  I recall seeing an example of this in the Vol II IE lab
workbook.
> 
> I don't recall all the details but if you can check out the IE
workbook.
> 
> HTH, Tim
> 
> -----Original Message-----
> From: Brian Lee [mailto:ipgirl@gmail.com] 
> Sent: Tuesday, July 26, 2005 9:34 AM
> To: ccie2be; 'B Kim'; 'CCIE Study Group'
> Subject: Re: PPPoA Dialer <---> Virtual-Template
> 
> What's the difference between the two aal5mux and  aal5snap ?
> I can't make it work with aal5mux.
> Btw, how can virtual-template interface with different ip subnet can
ping 
> each other ?
> 
> Lee.
> 
> ----- Original Message ----- 
> From: "ccie2be" <ccie2be@nyc.rr.com>
> To: "'B Kim'" <beokim@comcast.net>; "'CCIE Study Group'" 
> <ccielab@groupstudy.com>
> Sent: Tuesday, July 26, 2005 6:38 PM
> Subject: RE: PPPoA Dialer <---> Virtual-Template
> 
> 
> 
>>What happens if you use aal5mux as the encap on both sides?
>>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of B
>>Kim
>>Sent: Monday, July 25, 2005 10:00 PM
>>To: CCIE Study Group
>>Subject: PPPoA Dialer <---> Virtual-Template
>>
>>Hi
>>
>>I think PPPoA configured by Dialer interface on end and by the
>>Virtual-Template on the other end should work. But it doesn't in my
lab
>>work.
>>
>>Is it supposed to work or what is wrong with the configuration?
>>
>>Any comment would be appreciated. Thanks.
>>
>>R1:
>>!
>>interface ATM3/0
>>no ip address
>>no atm ilmi-keepalive
>>pvc 0/101
>> encapsulation aal5snap
>> protocol ppp dialer
>> dialer pool-member 1
>>!
>>!
>>interface Dialer1
>>ip address 10.1.12.1 255.255.255.0
>>encapsulation ppp
>>dialer pool 1
>>!
>>
>>R2:
>>!
>>interface ATM3/0
>>no ip address
>>no atm ilmi-keepalive
>>pvc 0/101
>> encapsulation aal5snap
>> protocol ppp Virtual-Template1
>>!
>>!
>>interface Virtual-Template1
>>ip address 10.1.12.2 255.255.255.0
>>!
>>
>>P.S.
>>When I configured the same type either Dialer or Virtual-Template on
>>both sides, then it works.

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