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Default route settings for stand alone network

Gary Cooper_1
Esteemed Contributor

Default route settings for stand alone network

My network is isolated from the outside world. Until recently I had connectivity via an ISDN router - this connection has now been removed (192.37.248.194) and on one of my 11.31 machines my routing table looks like...

 

Routing tables

Destination Gateway Flags Refs Interface Pmtu

127.0.0.1 127.0.0.1 UH 0 lo0 32808

192.37.248.164 192.37.248.164 UH 0 lan0 32808

192.37.248.0 192.37.248.164 U 2 lan0 1500

127.0.0.0 127.0.0.1 U 0 lo0 32808

default 192.37.248.194 UG 0 lan0 1500

 

(netstat -rn).

 

I'm getting lot's of the following message in syslog...

Jul 9 08:01:25 dimsvr vmunix: Dead gateway detection can't ping the last remaining default gateway at 0xc025f8c2 .See ndd -h ip_ire_gw_probe for more info

 

(But interestingly enough not on my other machines which also have 192.37.248.194 defined as the default route - they did report the 'dead gateway' message but then stopped doing so without any intervention. dimsvr persists in reporting the error.

 

What I'd like to do is remove the 192.37.248.194 routes, but my question is do I have to have a default route defined, even if I have no connections to the outside world? The only network traffic should be on 192.37.248.0-255.

 

Many thanks,

 

Gary

2 REPLIES
Patrick Wallek
Honored Contributor

Re: Default route settings for stand alone network

No you do not have to have a default route defined.

 

You can remove a route via the 'route delete' command.  To delete your default route, I believe the syntax is:

 

route delete default 192.37.248.194

 

 

You also need to make sure you remove the route information from your /etc/rc.config.d/netconf file so the route will not get added automatically when the server reboots.

Gary Cooper_1
Esteemed Contributor

Re: Default route settings for stand alone network

Thanks for the response Patrick.

 

I've now deleted the default route - hopefully the syslog messages will now stop.

 

Best regards,

 

Gary