[Solved] routing question: route network packets from one NIC to the

teetee1 · 2013-09-21 00:11:18

one machine with arch linux and with two NICs (this is done in virtualbox guest OS):
one NIC (enp0s3) is in 192.168.56.0/24 network with static IP and no Internet connection, while the other one (enp0s8) is set to use DHCP from the host network, the TCP/IP informatio changes with the network it is in, with Internet connection.

Here is the current setting for enp0s3:
# cat /etc/netctl/enp0s3

Description='A basic static ethernet connection'
Interface=enp0s3
Connection=ethernet
IP=static
Address=('192.168.56.10/24')
#Routes=('192.168.56.0/24 via 192.168.1.2')
Gateway='192.168.56.1'
#DNS=('192.168.56.1')

## For IPv6 autoconfiguration
#IP6=stateless

## For IPv6 static address configuration
#IP6=static
#Address6=('1234:5678:9abc:def::1/64' '1234:3456::123/96')
#Routes6=('abcd::1234')
#Gateway6='1234:0:123::abcd'

current `ip addr` output:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: enp0s3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 08:00:27:b6:e6:d0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.56.10/24 brd 192.168.56.255 scope global enp0s3
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:feb6:e6d0/64 scope link 
       valid_lft forever preferred_lft forever
3: enp0s8: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 08:00:27:dd:b4:db brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.132/24 brd 192.168.1.255 scope global enp0s8
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fedd:b4db/64 scope link 
       valid_lft forever preferred_lft forever

How do I set the route so that the system can use enp0s3 for network traffic that is within the 192.168.56.0 network, while all the other traffic goes through enp0s8? Thanks.

Last edited by teetee1 (2013-09-21 00:32:30)

fukawi2 · 2013-09-21 00:27:39

Remove Gateway='192.168.56.1' from /etc/netctl/enp0s3 so the gateway from the DHCP lease on enp0s8 will be the default gateway.

teetee1 · 2013-09-21 00:31:49

Thanks. It was exactly like you said! It's now working!

Last edited by teetee1 (2013-09-21 00:32:04)

Arch Linux

#1 2013-09-21 00:11:18

[Solved] routing question: route network packets from one NIC to the

#2 2013-09-21 00:27:39

Re: [Solved] routing question: route network packets from one NIC to the

#3 2013-09-21 00:31:49

Re: [Solved] routing question: route network packets from one NIC to the

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