Re: AutoInstall notes...

From: Pavel Bykov <slidersv_at_gmail.com>
Date: Sun, 26 Apr 2009 09:48:52 +0200

Yeah, but it won't figure out DLCIs automatically.
It essentially does the same thing with the commands I have wrote.

I actually heard of the customer from Cisco that was not able to use
autoinstall because of some liste mile access requirements. So what they
went for is essentially configuring only the necessities for the last mile
(like FR in your case)
and then specifying those two commands.
Method that Darby is referring to is autoinstall that I have mentioned, but
it does not do magic - it cannot figure out last mile access details like
encapsulation, on their own.

On Sat, Apr 25, 2009 at 10:02 PM, Modular <modulartx_at_gmail.com> wrote:

>
> Isn't the idea with autoinstall that you don't have to enter "any" commands
> on the AI router for it to work?
>
> Bryan R.
>
>
> On 4/25/09, Pavel Bykov <slidersv_at_gmail.com> wrote:
>>
>> Autinstall, if I remember coorectly, works when you have blank config
>> (i.e. after connecting you would see "would you like to enter automatic
>> config: yes/no)
>> In such a case, router has some interfaces unshut out of the box (you have
>> to look at doccd which model has which ports unshut)
>> and runs DHCP client on them.
>>
>> Over frame relay is a problem I think, since there is no "encapsulation
>> frame-relay" by default on such interfaces.
>>
>>
>> Also, ip-helper address command is used to translate broadcast frames of
>> certain protocols/ports into unicast ones. This is needed when R5 sends DHCP
>> Reques to the hub. Once it has ip adderss, it does not require helper
>> address translation. Or what is the logic here? That broadcast frame will
>> get to DHCP, TFTP and DNS server at the same time?
>>
>>
>> Otherwise, if you want your AI to work in the example you have two
>> commands missing:
>> 1. ip address dhcp
>> 2. service config
>>
>> Without these commands, AI will not get an address and will not download
>> the config.
>>
>>
>> On Mon, Apr 20, 2009 at 9:13 PM, Modular <modulartx_at_gmail.com> wrote:
>>
>>> I've been trying to nail down autoinstall just in case I get the dreaded
>>> autoinstall over frame-relay scenario
>>> on my Lab. Using info I found on the net I put some notes together on it.
>>> Would some of you mind looking
>>> through my notes and telling me if I'm missing anything or if anything is
>>> wrong?
>>>
>>> Thanks,
>>> Bryan R.
>>>
>>>
>>> ----------------------------------------------------------------------------------------------------------------------
>>> Auto-Install:
>>> Happens in steps:
>>> 1. DHCP to get IP. (optional)
>>> 2. Name-server lookup to get host name.
>>> 3. TFTP server to get config file.
>>>
>>> There are 4 "Functions" involved with this:
>>> 1. DHCP -Gives AI Router an IP.
>>> 2. DNS Server -Gives AI Router it's Name.
>>> 3. TFTP Server -Gives AI Router it's config file.
>>> 4. Hub -Optional. If exists need helper maps pointing to tftp & DNS
>>> servers
>>> AND
>>> "ip name-server" and domain-lookup configured. Possibly DHCP
>>> configured.
>>>
>>> CONFIGURATION:
>>> R5 is AI Router. R1 is the TFTP server, R6 is the DNS server and R4 is a
>>> FR
>>> hub.
>>>
>>> R1: -TFTP Server
>>>
>>> "tftp-server flash:r5-confg"
>>> -Note that the file must be in the flash of the device.
>>>
>>>
>>> R6: -DNS Server
>>>
>>> ip host r5 155.1.0.5
>>> ip dns server
>>> ip domain-lookup
>>>
>>>
>>> R4: -FR Hub & DHCP Server.
>>>
>>> ip domain-lookup
>>> ip name-server 155.1.146.6
>>> interface Serial0/0
>>> ip address 155.1.0.4 255.255.255.0
>>> ip helper-address 155.1.146.1 <-IP's of tftp and dns servers.
>>> ip helper-address 155.1.146.6
>>> encapsulation frame-relay
>>> frame-relay map ip 155.1.0.5 405 broadcast
>>> no frame-relay inverse-arp <-No inverse-arp, so need frame
>>> map on
>>> AI Router.
>>>
>>> ip dhcp exclude-address 155.1.0.1 155.1.0.4
>>> ip dhcp exclude-address 155.1.0.6 155.1.0.255
>>> ip dhcp pool
>>> network 155.1.0.0 /24
>>>
>>>
>>> R5: -AutoInstall router
>>>
>>> interface serial0/0
>>> encapsulation frame-relay
>>> no frame-relay inverse-arp
>>> frame-relay map ip 155.1.0.4 504 broadcast
>>>
>>>
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>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>> --
>> Pavel Bykov
>> ----------------
>> Don't forget to help stopping the braindumps, use of which reduces value
>> of your certifications. Sign the petition at
>> http://www.stopbraindumps.com/
>>
>
>

-- 
Pavel Bykov
----------------
Don't forget to help stopping the braindumps, use of which reduces value of
your certifications. Sign the petition at http://www.stopbraindumps.com/
Blogs and organic groups at http://www.ccie.net
Received on Sun Apr 26 2009 - 09:48:52 ART

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