Re: Why this default route doesn't work ?
- From: "Marlon" <marlon-nospam@xxxxxxxxxxx>
- Date: Thu, 2 Jun 2005 15:30:57 -0700
The computer is multihomed.
*Internet*-NIC
IP:1.78.253.1
Subnet:255.0.0.0
Default Gateway:1.78.253.254
Intranet-NIC:
IP:1.1.1.1
Subnet:255.0.0.0
(No default gateway)
Note that are although the subnet masks are the same on both NICs, the
networks are different. As far as i know that should not cause any problem.
Then I set the default gateway thru the route add command, but obviously
that is not working...
"Doug Sherman [MVP]" <dsherman@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:eplQkA8ZFHA.3840@xxxxxxxxxxxxxxxxxxxxxxx
> "on the second NIC" ?
>
> First I've heard of the second NIC. Is it possible that you have 2 NICs
on
> the same subnet? This can cause all kinds of problems.
>
> Doug Sherman
> MCSE, MCSA, MCP+I, MVP
>
> "Marlon" <marlon-nospam@xxxxxxxxxxx> wrote in message
> news:O933r77ZFHA.3132@xxxxxxxxxxxxxxxxxxxxxxx
> > I spoke too soon. That's correct, the article below confirms that I
> wouldn't
> > need a default gateway (and I shouldn't) set it up on the second NIC:
> > http://support.microsoft.com/default.aspx?scid=kb%3ben-us%3b157025
> >
> > In order to prove that 1.1.1.254 gateway knows the route to 2.2.2.2, I
go
> to
> > another server which does have the default gateway configured=1.1.1.254.
> > From such server I ping 2.2.2.2 successfully.
> > That means 1.1.1.254 knows the route to 2.2.2.2
> >
> >
> > Any ideas ?
> >
> > "Doug Sherman [MVP]" <dsherman@xxxxxxxxxxxxxxxxxxxxx> wrote in message
> > news:ecT8P27ZFHA.616@xxxxxxxxxxxxxxxxxxxxxxx
> > > They will all work fine provided 1.1.1.254 knows how to find 2.2.2.2.
A
> > > default gateway is not necessary. The following connects to google
just
> > > fine:
> > >
> > > Active Routes:
> > > Network Destination Netmask Gateway Interface
> > Metric
> > > 127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1
1
> > > 192.168.1.0 255.255.255.0 192.168.1.189 192.168.1.189
1
> > > 192.168.1.189 255.255.255.255 127.0.0.1 127.0.0.1
1
> > > 192.168.1.255 255.255.255.255 192.168.1.189 192.168.1.189
1
> > > 216.239.39.99 255.255.255.255 192.168.1.2 192.168.1.189
1
> > > 224.0.0.0 224.0.0.0 192.168.1.189 192.168.1.189
1
> > > 255.255.255.255 255.255.255.255 192.168.1.189 192.168.1.189
1
> > >
> > > Doug Sherman
> > > MCSE, MCSA, MCP+I, MVP
> > >
> > > "Neteng" <neteng.ccie@xxxxxxxxx> wrote in message
> > > news:OmWwbe7ZFHA.2288@xxxxxxxxxxxxxxxxxxxxxxx
> > > > These will not work because he has no DG. He would have to add the
> route
> > > > with the next hop being on the local subnet. A detailed explanation
> was
> > > > posted at groupstudy.
> > > >
> > > > "Doug Sherman [MVP]" <dsherman@xxxxxxxxxxxxxxxxxxxxx> wrote in
message
> > > > news:eOYMAL7ZFHA.3032@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > If the mask is correct, the command should be:
> > > > >
> > > > > route add 2.0.0.0 MASK 255.0.0.0 1.1.1.254
> > > > >
> > > > > If the network ID is correct but the mask is wrong, the command
> should
> > > be:
> > > > >
> > > > > route add 2.2.2.0 MASK 255.255.255.0 1.1.1.254
> > > > >
> > > > > Also, if you only need to reach one machine as opposed to an
entire
> > > > network,
> > > > > you can use a static route with the host IP and a full mask:
> > > > >
> > > > > route add 2.2.2.2 MASK 255.255.255.255 1.1.1.254
> > > > >
> > > > > Doug Sherman
> > > > > MCSE, MCSA, MCP+I, MVP
> > > > >
> > > > > "Magoo" <magoo-nospam@xxxxxxxxxxx> wrote in message
> > > > > news:%23mNmST6ZFHA.2900@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > > Pardon me, I sent you misinformation:
> > > > > > I have no default gateway set on the TCP/IP properties. That's
why
> I
> > > > > > configured the default route.
> > > > > > correct, assume the subnet mask is correct (I edited the IP
> address
> > > > before
> > > > > > posting this message and in the process I didn't reflect my
> correct
> > > > mask).
> > > > > >
> > > > > > Therefore all information is correct :
> > > > > > Assume I have the correct default route set with the right
subnect
> > > mask:
> > > > > > route 2.2.2.0 MASK 255.0.0.0 1.1.1.254.
> > > > > > It still returns destination host unreachable.
> > > > > > How can this be ?
> > > > > >
> > > > > >
> > > > > >
> > > > > > "Doug Sherman [MVP]" <dsherman@xxxxxxxxxxxxxxxxxxxxx> wrote in
> > message
> > > > > > news:Oy2lUN6ZFHA.1368@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > Well first of all, if the router/computer at 1.1.1.254 knows
> where
> > > to
> > > > > send
> > > > > > > packets destined for 2.2.2.2, then there is no need for a
static
> > > > route.
> > > > > > > Second, if the router/computer at 1.1.1.254 does not know
where
> to
> > > > send
> > > > > > > packets destined for 2.2.2.2, then a static route pointing to
> that
> > > > > gateway
> > > > > > > will not help. Finally, if you want to configure a static
route
> > to
> > > > the
> > > > > > > network on which 2.2.2.2 resides, it would be 2.0.0.0 NOT
> 2.2.2.0.
> > > > > > >
> > > > > > > Doug Sherman
> > > > > > > MCSE, MCSA, MCP+I, MVP
> > > > > > >
> > > > > > > "Magoo" <magoo-nospam@xxxxxxxxxxx> wrote in message
> > > > > > > news:uyNLjF6ZFHA.1456@xxxxxxxxxxxxxxxxxxxxxxx
> > > > > > > > I have a Win2003 server named ISA with the following
> > configuration
> > > > > under
> > > > > > > > TCP/IP Properties:
> > > > > > > >
> > > > > > > > IP address=1.1.1.1
> > > > > > > > Subnet mask=255.0.0.0
> > > > > > > > Defaut gateway=1.1.1.254
> > > > > > > >
> > > > > > > > That's it.
> > > > > > > >
> > > > > > > > Now I need to make sure this server will reach
> > > mypublisheserver.com.
> > > > > > > > On the host file of ISA Server, I put
> > > > > > > > mypublished server 2.2.2.2.
> > > > > > > >
> > > > > > > > Then I add a route:
> > > > > > > > Route add -p 2.2.2.0 MASK 255.0.0.0 1.1.1.254
> > > > > > > > I do a route print and I confirm the persistent, static
route
> > has
> > > > been
> > > > > > > > added.
> > > > > > > >
> > > > > > > > Then I ping mypublished server. It resolves to IP 2.2.2.2
> > > > > accordingly,
> > > > > > > but
> > > > > > > > it returns:
> > > > > > > > "Destination host unreachable"
> > > > > > > >
> > > > > > > > What's wrong ?
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>
.
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