Re: Few Basic Doubts

Hi Routing Freak,

I would like to suggest that you take advantage of the documentation on the
Cisco website. I'm happy to help if there is still a requirement to help
further clarify things but really check the documentation first.

If you don't know where how to get to it starting from www.cisco.com

At the bottom of the page click on the Support Link

At the bottom in the section labelled Support and Documentation Click on
Configure This will now bring you to the main area where the documentation
we care about in the CCIE lab lives

For routers - Click on Cisco IOS and NX-OS Software -> Cisco IOS -> Cisco
IOS Software Release 12.4 Family -> Cisco IOS Software Release 12.4 T

For switches - Click on Switches -> LAN Switches - Access -> Cisco Catalyst
3560 Series Switches

Now to give a specific example to help work out what dialer persistent does:

Assuming we've gone through the links to for the routers as listed above:
We already know what the command is, so lets try the master index and then
Cisco IOS Master Command List, Release 12.4T and search from there.
Since the command starts with D, we click on that and then control-F in the
browser and search for "dialer p" and click on the link associated with
dialer persistent which tells us about it.

On its own the explanation may not be so helpful so to explain it a little
further with PPPoE the whole dialer thing is a bit of a throwback to stuff
like when ISDN was considered a popular WAN technology for PPP and in a lot
of cases you would make calls to the other end it made sense to have a
"dialer" interface, so rather than completely reinvent the wheel, the
concepts were continued for PPPoE. Back in the day, nailed up (always on)
circuits were quite expensive to maintain so to help reduce the costs, you
would only dial out if there was "interesting traffic" which is pretty much
an access list when matched would cause the dialer to attempt to set up a
call. For PPPoE we generally don't care about this any more and may prefer
to have to call try to establish no matter what - dialer persistent helps
that to occur.

To get an indication of what the other commands do, please follow the same
kind of process - I think it may be worthwhile learning to make use of the
documentation and it is generally quite reasonable.

Cheers,
Adam

On Sat, Apr 30, 2011 at 9:59 PM, Routing Freak <routingfreak_at_gmail.com>wrote:

> Hi friends See this configuration
>
> Client Configuration:
>
> interface FastEthernet0/0
> description Ethernet WAN to PPPoE Server Fa0/0
> pppoe enable
> pppoe-client dial-pool-number 1
> !
> interface Dialer1
> ip address negotiated previous
> encapsulation ppp
> dialer pool 1
> dialer persistent
> ppp chap hostname client ppp chap password 0 pppoe
>
> What is the use of dialer persistent command and also ip address negotiated
> previous command
>
> Server Configuration:
>
> aaa new-model
> aaa authentication ppp default local
> username client password 0 pppoe
>
> ip dhcp excluded-address 192.168.200.254
> ip dhcp pool PPPoE
> network 192.168.200.0 255.255.255.0
> !
> bba-group pppoe global
> virtual-template 1
> !
> interface Virtual-Template1
> ip unnumbered FastEthernet0/0
> peer default ip address dhcp-pool PPPoE
> ppp authentication chap
> !
> interface FastEthernet0/0
> description Ethernet WAN to PPPoE Client Fa0/0
> ip address 192.168.200.254 255.255.255.0
> pppoe enable
>
> Can u please tell me what is the use of bba-group ppoe global and peer
> default ip address dhcp-pool PPPoE
>
>
> On Sat, Apr 30, 2011 at 2:33 PM, Satinder Singh <satinder.iitd_at_gmail.com>wrote:
>
>> Attaching the document i have prepared during my CCIE SP preparation. Hope
>> it is help you.
>>
>> Thanks and Regards
>> Satinder
>> CCIE #26831
>>
>>
>> On 30 April 2011 09:32, Adam Booth <adam.booth_at_gmail.com> wrote:
>>
>>> PPPoE Authentication is done the same for PPP using serial links - that
>>> is
>>> you can do no authentication, CHAP, PAP, EAP and the microsoft flavours
>>> of
>>> CHAP. In fact you can authentication in a single direction or both
>>> directions (mutual authentication) and if you do both directions you
>>> don't
>>> have to use the same authentication protocols.
>>>
>>> Here's a simple configuration using CHAP where the server authentications
>>> the client - http://noshut.blogspot.com/search/label/PPPoE
>>>
>>> Cheers,
>>> Adam
>>>
>>>
>>> On Sat, Apr 30, 2011 at 5:34 PM, Routing Freak <routingfreak_at_gmail.com
>>> >wrote:
>>>
>>> > Thank u Marko gud one
>>> > How to configure correct PPOE authentication
>>> > Can some one provide me the config
>>> >
>>> > On Fri, Apr 29, 2011 at 8:56 PM, Marko Milivojevic <
>>> markom_at_ipexpert.com
>>> > >wrote:
>>> >
>>> > > For understanding PPPoE, absolutely the best resource is RFC 2516:
>>> > > http://www.faqs.org/rfcs/rfc2516.html. It's an an excellent read and
>>> > > it will explain PPPoE beyond any doubt. What part of configuring it
>>> is
>>> > > giving you trouble?
>>> > >
>>> > > FR NNI is an interface type in Frame Relay used to interconnect two
>>> > > Frame Relay switches. You probably don't need to worry about it in
>>> any
>>> > > capacity, as in 2011 you are very unlikely to be building Frame Relay
>>> > > switching infrastructure.
>>> > >
>>> > > --
>>> > > Marko Milivojevic - CCIE #18427
>>> > > Senior Technical Instructor - IPexpert
>>> > >
>>> > > FREE CCIE training: http://bit.ly/vLecture
>>> > >
>>> > > Mailto: markom_at_ipexpert.com
>>> > > Telephone: +1.810.326.1444
>>> > > Web: http://www.ipexpert.com/
>>> > >
>>> > > On Fri, Apr 29, 2011 at 03:31, Routing Freak <routingfreak_at_gmail.com
>>> >
>>> > > wrote:
>>> > > > Hey i have some basic doubts
>>> > > >
>>> > > > 1) Can anyone explain me what is the function of PPOE and how does
>>> it
>>> > > works
>>> > > > and how it is configured and also can some xplain the
>>> authentication
>>> > > process
>>> > > > in PPOE
>>> > > >
>>> > > > 2) Frame Relay NNI Can anyone explain me this feature in Frame
>>> Relay?
>>> > > >
>>> > > >
>>> > > > Blogs and organic groups at http://www.ccie.net
>>> > > >
>>> > > >
>>> _______________________________________________________________________
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>>>
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Received on Sat Apr 30 2011 - 23:07:00 ART