IP Packet Forwarding

[TheLad]

Guys

Can someone please explain how this works? We are running NetWare 5.1 with IPX and IP. If the IP configuration has IP Packet Forwarding disabled, you cannot ping or connect to the server via IP. If it is switched on, you can.

I was under the impression that the network routers performed IP routing as I am sure this was the case at a previous employer. There, they were running NetWare 5.0 with IPX and IP but IP Packet Forwarding was switched off and the servers pinged and connected via IP with no problems.

Cheers

 

[Guest_imported]

IP packet fowarding is IP routing.
You do really need 2 interfaces though to do it right!

If you can't login via IP, check y0our SLP configuration, I'd recommened static named scopes as this is the most "future proof"

Hope this helps

 

[TheLad]

But why can't I even ping the server if IP Routiong is off? Surely the routers should route IP packets and there should be no need for IP routing to be enabled on the server?

 

[yvfwc]

You should be able to ping the server. Do you have static routing enabled? What is your TCP/IP Expert Configuration settings?

Cheers,

Mark ;-)

 

[TheLad]

Mark - static routing is enabled to the default gateway of the site (same as the workstations). As for the TCP/IP Expert Configuration settings:

Direct Broadbast Forwarding: Disabled
Forward Source Route Packets: Disabled
BootP: Disabled
EGP: Disabled

Is this correct? All disabled?

 

[yvfwc]

That works for me....can you ping within the same site? Or is it just from the WAN that you can't ping the server? How about RIP & OSPF, what are their settings? I've got a combination of settings at different sites, but I can still ping them all, locally & from the WAN.

You've got me interested, does anyone out there see the problem???

Cheers,

Mark ;-)

 

[TheLad]

Mark

My PC is on the same LAN as the servers, all be it a different hub. I am worried that the network is not routing IP properly and therefore the servers are having to do it. I have seen this with IPX where (at a previous employment) we had to switch on IPX routing due to an issue with the Cisco and Bay switches not routing packets properly.

As far as the other settings you mention:

RIP - Enabled
OSPF - Disabled

Cheers

 

[yvfwc]

Your setting are the same as mine. Have you tried a ping from a different pc on a different segment? Can you ping from (or to) another server? How about from switch to server and server to switch?

Cheers,

Mark ;-)

 

[Pocket]

The only time I've ever seen anything like this was during a transition period of one of our networks, when the routers and servers were using different subnet masks. It's too late in the evening for me to remember exactly how this worked, but it might be worth checking out.

Good luck.

Pocket