Re: Default router issue

On Jun 3, 5:28 am, Sam Wilson <Sam.Wil...@xxxxxxxx> wrote:
In article <A261k.470$L...@xxxxxxxxxxxxxxxxxxxx>,
Charles N Wyble <char...@xxxxxxxxxxxxx> wrote:

So I have a strange issue with my 1841. I'm using it in a very simple
scenario (home router on DSL line).

For some reason the router of last resort only gets set if I set
FastEthernet0/1 address via dhcp. If I set it statically and then set
router of last resort it doesn't show in show run config.

Anyone seen something like this? Is it a known bug in a slightly
outdated version of IOS?

ROM: System Bootstrap, Version 12.3(8r)T6, RELEASE SOFTWARE (fc1)

I haven't read through all of the release notes for later versions of
IOS. Is that where I should look to see bug notices or is there some
place else I should check for that?

If you set the Fa0/1 address manually are you also setting a default
route? If not then there won't be one. A DHCP server will usually
provide a default gateway as well as an IP address (as well a whole
bunch of other stuff).

Sam

Sam is right on point, if you are not running a routing protocol with
the provider (which is never done on Residential service), then you
router is getting its default gateway from the DHCP process. DHCP can
provide many extra fields beyond an IP and Subnet Mask, such as DNS
servers, default gateways, and tftp servers. As soon as you set a
static, you must provide these variables on your own to each node on
that same subnetwork (in this case, probably only your router, and DNS/
TFTP are probably not needed).
.

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