Why does my routing table only have 1 entry?

Hi,

We were recently assigned to a new network, and I'm trying to update
the settings on my Solaris machine. Assume the IP of the default
gateway is 123.234.123.234. When I run netstat -rn, I get the
following

Routing Table
Destination Gateway Flags Ref Use Interface
--------------------------------------------------------------------------------------------
127.0.0.1 127.0.0.1 UH 0 0 lo0

which seems odd. Shouldn't my default gateway appear in this table?
Then when I try to ping the gateway (which works from other computers),
I get this message

> ping 123.234.123.234
ICMP Net Unreachable from gateway localhost (127.0.0.1) for icmp from
localhost (127.0.0.1) to 123.234.123.234

Any advice you can offer on updating my routing table is greatly
appreciated. Thanks, - Dave

(E-Mail Removed) wrote:
> Hi,
>
> We were recently assigned to a new network, and I'm trying to update
> the settings on my Solaris machine. Assume the IP of the default
> gateway is 123.234.123.234. When I run netstat -rn, I get the
> following
>
> Routing Table
> Destination Gateway Flags Ref Use Interface
> --------------------------------------------------------------------------------------------
> 127.0.0.1 127.0.0.1 UH 0 0 lo0
>
> which seems odd. Shouldn't my default gateway appear in this table?
> Then when I try to ping the gateway (which works from other computers),
> I get this message
>
>
>>ping 123.234.123.234
>
> ICMP Net Unreachable from gateway localhost (127.0.0.1) for icmp from
> localhost (127.0.0.1) to 123.234.123.234
>
> Any advice you can offer on updating my routing table is greatly
> appreciated. Thanks, - Dave

Did you know you posted to a Linux group, not a Solaris group? (Of
course, some cross-over of expertise is to be expected, but I'm setting
follow-ups to comp.unix.solaris.

Based on the routing table, I'd say your Ethernet interfaces are either
not up or not configured.

(E-Mail Removed) writes:

>Hi,

>We were recently assigned to a new network, and I'm trying to update
>the settings on my Solaris machine. Assume the IP of the default
>gateway is 123.234.123.234. When I run netstat -rn, I get the
>following

>Routing Table
>Destination Gateway Flags Ref Use Interface
>--------------------------------------------------------------------------------------------
>127.0.0.1 127.0.0.1 UH 0 0 lo0

>which seems odd. Shouldn't my default gateway appear in this table?

It is not odd. It just says that no routes whatsoever have been set up.
Probably the ethernet card is not set up either.


>Then when I try to ping the gateway (which works from other computers),
>I get this message

>> ping 123.234.123.234
>ICMP Net Unreachable from gateway localhost (127.0.0.1) for icmp from
>localhost (127.0.0.1) to 123.234.123.234

Of course not. It has no way of getting the packet there.

YOu need a local route, which includes the gateway, which your system can
reach via the local attacked ethernet (Ie are on the same net) and a
default route through the gateway.

route add -net 111.222.333.0 netmask 255.255.255.0 eth0
route add default gw 111.222.333.254 eth0


>Any advice you can offer on updating my routing table is greatly
>appreciated. Thanks, - Dave

On Thu, 27 Jul 2006 19:06:06 +0000, Unruh wrote:

> YOu need a local route, which includes the gateway, which your system can
> reach via the local attacked ethernet (Ie are on the same net) and a
> default route through the gateway.
>
> route add -net 111.222.333.0 netmask 255.255.255.0 eth0
> route add default gw 111.222.333.254 eth0

It's a bit different in Solaris, which is the OS the OP is using.

This is very useful. When I try the first command you suggest

> route add -net 111.222.333.0 netmask 255.255.255.224 eth0

in whichi "255.255.255.224" is the actual subnet mask given by our IT
department, i get the error "netmask: bad value". What happened?
Thanks, -

Unruh wrote:
> (E-Mail Removed) writes:
>
> >Hi,
>
> >We were recently assigned to a new network, and I'm trying to update
> >the settings on my Solaris machine. Assume the IP of the default
> >gateway is 123.234.123.234. When I run netstat -rn, I get the
> >following
>
> >Routing Table
> >Destination Gateway Flags Ref Use Interface
> >--------------------------------------------------------------------------------------------
> >127.0.0.1 127.0.0.1 UH 0 0 lo0
>
> >which seems odd. Shouldn't my default gateway appear in this table?
>
> It is not odd. It just says that no routes whatsoever have been set up.
> Probably the ethernet card is not set up either.
>
>
> >Then when I try to ping the gateway (which works from other computers),
> >I get this message
>
> >> ping 123.234.123.234
> >ICMP Net Unreachable from gateway localhost (127.0.0.1) for icmp from
> >localhost (127.0.0.1) to 123.234.123.234
>
> Of course not. It has no way of getting the packet there.
>
> YOu need a local route, which includes the gateway, which your system can
> reach via the local attacked ethernet (Ie are on the same net) and a
> default route through the gateway.
>
> route add -net 111.222.333.0 netmask 255.255.255.0 eth0
> route add default gw 111.222.333.254 eth0
>
>
> >Any advice you can offer on updating my routing table is greatly
> >appreciated. Thanks, - Dave

On 2006-07-27, (E-Mail Removed) <(E-Mail Removed)> wrote:
> This is very useful. When I try the first command you suggest
>
>> route add -net 111.222.333.0 netmask 255.255.255.224 eth0
>
> in whichi "255.255.255.224" is the actual subnet mask given by our IT
> department, i get the error "netmask: bad value". What happened?
> Thanks, -

Probably, solaris 'route' does not understand Linux syntax.

(E-Mail Removed) wrote:
> This is very useful. When I try the first command you suggest
>> route add -net 111.222.333.0 netmask 255.255.255.224 eth0

> in whichi "255.255.255.224" is the actual subnet mask given by our IT
> department, i get the error "netmask: bad value".

> What happened?

What happened is that you asked for Solaris advice in a Linux group, and
didn't apply the (correct) information from one OS to another. Suggest
you read the man page for route, which - at least on Solaris 9 - gives
actual examples for setting the netmask.

Chris

In comp.os.linux.networking Unruh <unruh-(E-Mail Removed)>:
> (E-Mail Removed) writes:

>>We were recently assigned to a new network, and I'm trying to update
>>the settings on my Solaris machine. Assume the IP of the default

Great, but what has this to do with linux? As others already
pointed out use a solaris ng for some solaris question!

Or at least check the manuals on your system and if still can't
figure it out:

http://sunsolve.sun.com/
[..]

>>> ping 123.234.123.234
>>ICMP Net Unreachable from gateway localhost (127.0.0.1) for icmp from
>>localhost (127.0.0.1) to 123.234.123.234

> Of course not. It has no way of getting the packet there.

> YOu need a local route, which includes the gateway, which your system can
> reach via the local attacked ethernet (Ie are on the same net) and a
> default route through the gateway.

> route add -net 111.222.333.0 netmask 255.255.255.0 eth0

You don't need to add a route to the network the IP belongs to on
linux, the system will do this on its own.

On solaris you might need in addition to set a host route to the
own interface, currently unsure (off-hand) if this is the case
for HP-UX, solaris or both. Guess I had to look it up. ;-)

--
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
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