how to make a permanent route

cedrichiu · ‎10-23-2009

hi,

does anyone know how to make permanent route and even after server reboot, the route will still be existed in routing table?

Thanks

Matti_Kurkela · ‎10-23-2009

Sure. Edit /etc/rc.config.d/netconf and add your permanent route in there.

For example, if you want this route made permanent:

route add net 10.20.30.0 netmask 255.255.255.0 10.2.2.2 1

... you would add lines like this to the netconf file:

ROUTE_DESTINATION[x]="net 10.20.30.0"
ROUTE_MASK[x]="255.255.255.0"
ROUTE_GATEWAY[x]="10.2.2.2"
ROUTE_COUNT[x]=1

Replace "x" with the first unused index number for a set of route entries. Usually the default gateway is defined with index 0.
If you have no other permanent routes defined yet, "x" would be 1 in your new route configuration lines.

MK

MK

cedrichiu · ‎10-23-2009

hi,

Thanks. What happen if the destination is a server, and I don't really quite sure the gateway. Could your given guide works well ?

Appreciate that.

Steven E. Protter · ‎10-23-2009

Shalom,

I change the route information in /etc/rc.config.d/netconf

Note: Backup copies should not reside in /etc/rc.config.d

You can set default routes and secondary routes.

netstat -rn
# To see the results.

Be careful about typoes in that file, which has fairly good internal documentation.

SEP

Steven E Protter
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com

Matti_Kurkela · ‎10-23-2009

The default route/gateway specification looks like this (replace 11.22.33.44 with your default gateway):

ROUTE_DESTINATION[0]="default"
ROUTE_MASK[0]=""
ROUTE_GATEWAY[0]="11.22.33.44"
ROUTE_COUNT[0]=1

The index number [in brackets] for the default gateway is typically 0, because this entry is usually created by the OS installation procedure. All other permanent routes are created by the sysadmin.

A single-host route would be specified like this:

ROUTE_DESTINATION[x]="host 10.11.12.13"
ROUTE_MASK[x]=""
ROUTE_GATEWAY[x]="22.33.44.55"
ROUTE_COUNT[x]=1

MK

MK

cedrichiu · ‎10-25-2009

hi MK,

Does any network services need to restarted after modification ?

Is that correct ?
> /sbin/init.d/net stop and start

Regards

Matti_Kurkela · ‎10-25-2009

Any changes to /etc/rc.config.d/netconf take effect only when "/sbin/init.d/net start" is executed, which happens automatically at system reboot.

If you are not familiar with editing the /etc/rc.config.d/netconf file, running "/sbin/init.d/net stop; /sbin/init.d/net start" or rebooting the system is recommended to confirm that your syntax is correct.

But running /sbin/init.d/net may cause a total loss of all network connections for a few seconds: it does more actions than is strictly necessary for adding a route. If you need to add a new route without any kind of service interruption, you *can* add the route using the "route" command without any service interruption, and edit /etc/rc.config.d/netconf to cause the new route be auto-added at system startup.

Of course, if you do this, you should document the change so that you and your fellow sysadmins will know where to start troubleshooting if the system does not successfully start up networking after the next scheduled maintenance break...

NOTE: if you want to keep a backup version of the /etc/rc.config.d/netconf file, do not leave the backup in /etc/rc.config.d directory: move it somewhere else.

MK

MK

cedrichiu · ‎11-11-2009

hi,

can you advise why it still encounter error in adding route to 10.200.64.132 via lan2? In fact lan2 is pingable

psa1a:/root# /sbin/init.d/net stop
psa1a:/root# /sbin/init.d/net start
ERROR: Failed to add route entry because its interface is not
yet initialized. May need to add this route entry with
a route commad after the interface is up :
add host 10.200.64.132: gateway 172.19.149.140: Network is unreachable
psa1a:/root#
psa1a:/root# ping 172.19.149.140
PING 172.19.149.140: 64 byte packets
64 bytes from 172.19.149.140: icmp_seq=0. time=0. ms
64 bytes from 172.19.149.140: icmp_seq=1. time=0. ms

----172.19.149.140 PING Statistics----
2 packets transmitted, 2 packets received, 0% packet loss
round-trip (ms) min/avg/max = 0/0/0
psa1a:/root# ifconfig lan2
lan2: flags=1843
inet 172.19.149.140 netmask ffffff80 broadcast 172.19.149.255

Johnson Punniyalingam · ‎11-11-2009

>>psa1a:/root# /sbin/init.d/net stop
psa1a:/root# /sbin/init.d/net start
ERROR: Failed to add route entry because its interface is not
yet initialized. May need to add this route entry with<<<

why did you do this <> already explained to you , you just adding the route

can post below

ioscan -fnC lan
netstat -in
netstat -rn