Thanks for the additional info Priscilla. I had always thought that the "service
config" statement
was a default with IOS 11.0 and later.
Tom Lisa, Instructor, CCNA, CCAI
Community College of Southern Nevada
Cisco Regional Networking Academy
Priscilla Oppenheimer wrote:
> Yes, it's definitely worth mentioning that SLARP can be a pain, especially
> in a lab environment or training classroom. You connect two routers
> together over a serial back-to-back cable. Turn on one router and configure
> the IP address and subnet mask. Turn on the other router, and if you're not
> quick, the darn thing will SLARP. Then it sits there forever (seems like
> forever at least), doing reverse DNS to find its name, and trying to find a
> TFTP server to download the rest of its config. To make matters worse it
> puts the "service config" command in the config file, which causes it to
> look for a server every time you reboot (if you save the config).
>
> A few times a month we get the question about the router looking for its
> config from a server. The answers always say to add "no service config" to
> your config, but the answers don't explain how the annoying "service
> config" line got in your config to start with. It's probably that slippery
> SLARP.
>
> To be totally accurate, it's AutoInstall that does this, but that's not s
> fun to say. &;-) SLARP is one component of AutoInstall in an HDLC
> environment. AutoInstall can also work with Frame Relay, Ethernet, Token
> Ring, and FDDI, according to the doc here:
>
>
>http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/fun_c/fcprt1/fccfgtoo.htm
>
> Thanks for the great ideas on making TCP more relevant to my students,
> Marty. Offline, if you get a chance, could you tell me more about tweaking
> your TCP stack on Windows? Thanks.
>
> Priscilla
>
> At 12:37 PM 2/10/01, Marty Adkins wrote:
> >Priscilla Oppenheimer wrote:
> > >
> > > Yup, SLARP is pretty cool. It's one good reason to use HDLC. It makes
> > > configuration so easy. Also, the students will love saying SLARP. I'm
> > > helping out with the academy at our local high school, as I've mentioned
> > > before. Those students will love saying SLARP, over and over and over
> > again.
> > >
> >Unless autoinstall has changed in the last year or so, it used to first
> >try HCLC, then PPP, then Frame Relay, and I think there was a forth one.
> >Yes, SLARP is very cool... when you want it. When you don't, it sure
> >adds a bunch of time -- if the SLARP succeeds, then IOS gets very patient
> >broadcasting rDNS, TFTP, etc. etc.
> >
> > > I'm having a hard time, in general, teaching networking to kids who don't
> > > really love it and don't have to know it for their jobs. I got spoiled,
> > > teaching classes to people who had paid money to be there and needed the
> > > info to survive on the job. I'm sure it's quite different at a community
> > > college, but you probably get some young people too. Any advice?? Thanks!
> > >
> >Hmmm, tell them you're going to teach them TCP/IP operation so they can
> >learn how to tweak their TCP stack and soup up those Napster downloads!
> >:-) :-)
> >
> >- Marty
>
> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
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