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Operating Systems Solaris How to set gateway address to a particular interface? Post 302834575 by rbatte1 on Friday 19th of July 2013 09:39:14 AM
Old 07-19-2013
The default router will need to be directly available from any Network Interface Card (NIC) that uses it. If you have:-
Code:
NIC 0  - IP 123.100.100.30, Netmask 255.255.255.224
NIC 1  - IP 168.100.100.30, Netmask 255.255.0.0
NIC 2  - IP 123.100.100.230, Netmask 255.255.255.224

...and you set the default router as 123.100.100.1, then all the traffic will route through NIC 0 as that is the only one that can get to it. Even NIC 2 on the similar range will be ignored.

What are you trying to achieve? Do you want to have multiple 'default' routes? It is possible, but then you don't know what route will be used for any connection and you end up writing many more firewall rules.



Robin
Liverpool/Blackburn
UK
 

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routes(4)						     Kernel Interfaces Manual							 routes(4)

NAME
routes - Specifies Internet routing information to the routing tables SYNOPSIS
/etc/routes DESCRIPTION
Static routes can be defined in the /etc/routes file. The /etc/routes file identifies static routes that are automatically added to the network routing tables with the /usr/sbin/route add command. The /sbin/init.d/route script contains the /usr/sbin/route add command that is executed for each entry in the /etc/routes file when the network is restarted on the system or the system is rebooted. The general format of an entry in the /etc/routes file is: Dest Name1 Name2 The following is a brief description of each element in an /etc/routes file entry: A keyword that indicates whether the route is to a net- work or to a host. The two possible keywords are -net and -host. The name or address of the destination network or host. Name1 can be either a symbolic name (as used in the /etc/hosts or /etc/networks file) or an Internet address specified in dotted-decimal format. The name or address of the gateway host to which messages should be forwarded. Name2 can be either a symbolic name (as used in the /etc/hosts file) or an Internet address specified in dotted-decimal format. The routes file is a Context-Dependent Symbolic Link (CDSL) and must be maintained as such. See the System Administration manual for more information. EXAMPLES
To specify a route to a network through a gateway host with an entry in the /etc/routes file, enter: -net net2 host4 This example specifies a route to a network, net2, through the gateway host4. To specify a route to a host through a gateway host with an entry in the /etc/routes file, enter: -host host2 host4 This example specifies a route to a host, host2, through the gateway host4. To specify a route to a default gateway host with an entry in the /etc/routes file, enter: default 130.9.0.5 This example specifies a route to a default gateway with an Internet address of 130.9.0.5. FILES
Contains the /usr/sbin/routed add command. RELATED INFORMATION
Commands: route(8) Daemons: gated(8), routed(8) Files: gated.conf(4) Network Administration delim off routes(4)
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