Re: AutoInstall notes...

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
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