Very Computer

by **Walt** » Sat, 08 Jun 2002 17:26:36

Hello guys,

I have a machine with two interfaces, each connected to
a gateway. This two gateways are then connected to a common
network and I want to ping another router in that network over
the two interfaces.

Looks like this:
Gateway 1
----
------------| |------------
| Subnet A ---- |
----
Machine | | Subnet C Router
----
| Subnet B ---- |
------------| |------------
----
Gateway 2

Now if I type following on my machine it doesn't work:

ping -g 'IP in Subnet A of Gateway 1' 'Router-IP-address'

But if I do a ping (Defaultgateway is 'IP in Subnet A of Gateway 1'
(without -g) it works fine:

ping 'Router-IP-address'

Can someone give me a hint? Thanks in advance!

Cheers, Walter

by **Yong Hua** » Sun, 09 Jun 2002 06:36:23

> Hello guys,

> I have a machine with two interfaces, each connected to
> a gateway. This two gateways are then connected to a common
> network and I want to ping another router in that network over
> the two interfaces.

> Looks like this:
> Gateway 1
> ----
> ------------| |------------
> | Subnet A ---- |
> ----
> Machine | | Subnet C Router
> ----
> | Subnet B ---- |
> ------------| |------------
> ----
> Gateway 2

> Now if I type following on my machine it doesn't work:

> ping -g 'IP in Subnet A of Gateway 1' 'Router-IP-address'

> But if I do a ping (Defaultgateway is 'IP in Subnet A of Gateway 1'
> (without -g) it works fine:

> ping 'Router-IP-address'

Maybe there's another gateway involved? If you do a traceroute Router,
you may see another IP address before it reaches Router. I don't think
you can specify multiple gateways after -g. I tried ping -g [that
another gateway] [destination] and it hangs for me.

Yong Huang

by **Barry Margoli** » Sun, 09 Jun 2002 07:22:51

>Now if I type following on my machine it doesn't work:

>ping -g 'IP in Subnet A of Gateway 1' 'Router-IP-address'

>But if I do a ping (Defaultgateway is 'IP in Subnet A of Gateway 1'
>(without -g) it works fine:

>ping 'Router-IP-address'

Many routers are configured to block packets that use the source routing
options, because they have been used in the past to bypass filtering
routers. On a Cisco router this is done with "no ip source-route".

--

Genuity, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the group.

Very Computer

ping -g 'gateway-IP' 'host-IP' DOESN'T work!

ping -g 'gateway-IP' 'host-IP' DOESN'T work!

ping -g 'gateway-IP' 'host-IP' DOESN'T work!

ping -g 'gateway-IP' 'host-IP' DOESN'T work!