Two or more network interfaces: Difference between revisions

Revision as of 16:13, 19 August 2021

Suppose that we have a system with already configured network interface eth0 and we want to add another interface eth1 with address a.a.a.a from network n.n.n.n/22 and gateway g.g.g.g.

Add eth1 data to /etc/rc.d/rc.inet1.conf. Do not change the gateway.

Add a routing table to /etc/iproute2/rt_tables:

#
# reserved values
#
255     local
254     main
253     default
0       unspec
#
# local
#
#1      inr.ruhep
1 rt2

Add

if ! /sbin/ip route list table rt2 | grep "^default via g.g.g.g dev eth1" 1> /dev/null ; then
  /sbin/ip route add n.n.n.n/22 dev eth1 proto kernel src a.a.a.a table rt2
  /sbin/ip route add default via g.g.g.g dev eth1 metric 1 table rt2
fi

to the end of the function gateway_up in /etc/rc.d/rc.inet1

# /etc/rc.d/rc.inet1 restart

$ /sbin/ip route list table rt2

Add

if ! /usr/sbin/ip rule show | grep "a.a.a.a lookup rt2" 1> /dev/null ; then
  /usr/sbin/ip rule add from a.a.a.a/32 table rt2
  /usr/sbin/ip rule add to a.a.a.a/32 table rt2
fi

to /etc/rc.d/rc.firewall

# /etc/rc.d/rc.fiorewall restart

$ /sbin/ip rule show

@@ Line 1: / Line 1: @@
 ''Based on [https://www.thomas-krenn.com/en/wiki/Two_Default_Gateways_on_One_System the Thomas-Krenn-Wiki]''
-Suppose that we have a system with already configured network interface <code>eth0</code> and we want to add another interface <code>eth1</code> with address <code>a.a.a.a</code> from the network <code>n.n.n.n/22</code> and the gateway <code>g.g.g.g</code>.
+Suppose that we have a system with already configured network interface <code>eth0</code> and we want to add another interface <code>eth1</code> with address <code>a.a.a.a</code> from network <code>n.n.n.n/22</code> and gateway <code>g.g.g.g</code>.
 * Add <code>eth1</code> data to <code>/etc/rc.d/rc.inet1.conf</code>. Do not change the gateway.

Two or more network interfaces: Difference between revisions

Revision as of 16:13, 19 August 2021

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