Ip linux command - Revision history

Heth: /* References */

2017-05-16T08:22:46Z

‎References

Heth: /* Adding IP addresses */

2012-05-02T12:21:13Z

‎Adding IP addresses

Heth: /* References */

2012-05-02T12:16:44Z

‎References

Heth: /* Adding IP addresses */

2012-05-01T12:50:48Z

‎Adding IP addresses

Heth: /* Adding a virtual router */

2012-05-01T06:10:27Z

‎Adding a virtual router

Heth: Created page with "Introduction to the linux '''ip'''[http://linux.die.net/man/8/ip ip command '''man''' page]. '''Function:''' show / manipulate routing, devices, policy routing and t..."

2012-05-01T06:08:02Z

Created page with "Introduction to the linux '''ip'''<ref>[http://linux.die.net/man/8/ip ip command '''man''' page]</ref>. '''Function:''' show / manipulate routing, devices, policy routing and t..."

New page

Introduction to the linux '''ip'''<ref>[http://linux.die.net/man/8/ip ip command '''man''' page]</ref>.

'''Function:''' show / manipulate routing, devices, policy routing and tunnels
=Basic IPv4=
==Show route table==
<source lang=cli>
heth@mars:~$ <input>ip route</input>
172.16.4.0/24 dev eth0 proto kernel scope link src 172.16.4.17
192.168.139.0/24 via 172.16.4.19 dev eth0
192.168.0.0/16 via 172.16.4.21 dev eth0
172.16.0.0/12 via 172.16.4.21 dev eth0
10.0.0.0/8 via 172.16.4.21 dev eth0
default via 172.16.4.16 dev eth0 metric 100
</source>
==Show interface device==
<source lang=cli>
heth@mars:~$ <input>ip addr show eth0</input>
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:14:5e:67:61:4a brd ff:ff:ff:ff:ff:ff
inet 172.16.4.17/24 brd 172.16.4.255 scope global eth0
</source>
==Adding IP addresses==
<source lang=cli>
root@mars:~# <input>ip addr add 17.30.5.65/24 dev eth1</input>
root@mars:~# <input>ip addr add 17.30.6.65/24 dev eth1</input>
root@mars:~# <input>ip addr show eth1
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
link/ether 00:14:5e:67:61:4b brd ff:ff:ff:ff:ff:ff
inet 17.30.5.65/24 scope global eth1
inet 17.30.6.65/24 scope global eth1
</source>
==Deleting IP addresses
<source lang=cli>
root@mars:~# <input>ip addr del 17.30.6.65/24 dev eth1</input>
</source>
==Adding a route==
<source lang=cli>
root@mars:~# <input>ip route add 172.31.9.0/24 via 172.16.4.16 dev eth0</input>
root@mars:~# <input>ip route add 172.31.10.0/24 via 172.16.4.16</input>
</source>
==Deleting a route==
<source lang=cli>
root@mars:~# <input>ip route del 172.31.9.0/24 via 172.16.4.16 dev eth0</input>
root@mars:~# <input>ip route del 172.31.10.0/24 via 172.16.4.16</input>
</source>
==Adding a virtual router==
Adding a virtual router between '''eth1''' and '''eth2''' and using [[NAT Linux|NAT]].
*Outside: '''eth1'''
*Inside: '''eth2'''
The script could be added to '''/etc/rc.local'''
<source lang=cli>
echo "1" > /proc/sys/net/ipv4/ip_forward
ip route flush table 4
ip rule del fwmark 4 table 4
iptables -F -t nat
iptables -F -t mangle

ip route add table 4 204.0.0.32/28 dev eth1 scope link
ip route add table 4 172.21.0.0/16 dev eth2 scope link
ip route add table 4 172.22.0.0/16 dev eth2 via 172.21.0.2
ip route add table 4 default via 204.0.0.33

iptables -t mangle -A PREROUTING -s 172.21.0.0/16 -d 0/0 -j MARK --set-mark 4
iptables -t mangle -A PREROUTING -s 172.22.0.0/16 -d 0/0 -j MARK --set-mark 4
ip rule add fwmark 4 table 4

iptables -t nat -A POSTROUTING -s 172.21.0.0/16 --mark 4 -d 0/0 -j SNAT --to 204.0.0.34
iptables -t nat -A POSTROUTING -s 172.22.0.0/16 --mark 4 -d 0/0 -j SNAT --to 204.0.0.34
</source>
;Note: the --mark i '''iptables''' POSTROUTING needs verification

=References=
<references/>
{{Source cli}}
[[Category:network]][[Category:Linux]]

@@ Line 74: / Line 74: @@
 -->
 =References=
 <references/>
 {{Source cli}}
 [[Category:network]][[Category:Linux]][[Category:Linux Command]]

@@ Line 30: / Line 30: @@
      inet 17.30.6.65/24 scope global eth1
 </source>
-==Deleting IP addresses
+==Deleting IP addresses==
 <source lang=cli>
 root@mars:~# <input>ip addr del 17.30.6.65/24 dev eth1</input>

@@ Line 24: / Line 24: @@
 root@mars:~# <input>ip addr add 17.30.5.65/24 dev eth1</input>
 root@mars:~# <input>ip addr add 17.30.6.65/24 dev eth1</input>
-root@mars:~# <input>ip addr show eth1
+root@mars:~# <input>ip addr show eth1</input>
 : eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN qlen 1000
      link/ether 00:14:5e:67:61:4b brd ff:ff:ff:ff:ff:ff
@@ Line 34: / Line 34: @@
 root@mars:~# <input>ip addr del 17.30.6.65/24 dev eth1</input>
 </source>
 ==Adding a route==
 <source lang=cli>

@@ Line 46: / Line 46: @@
 ==Adding a virtual router==
 Adding a virtual router between '''eth1''' and '''eth2''' and using [[NAT Linux|NAT]].
-*Outside: '''eth1'''
+*Outside: '''eth1''' ip addr 204.0.0.34/28
-*Inside: '''eth2'''
+*Inside: '''eth2'''  ip addr 172.21.0.201/16
 The script could be added to '''/etc/rc.local'''
 <source lang=cli>
@@ Line 72: / Line 72: @@
 File oldmars /home/cisco/cisco/qos/rc.local
 -->
 =References=
 <references/>
 {{Source cli}}
 [[Category:network]][[Category:Linux]]