Difference between revisions of "NMCLI"

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==Policy Based Routing==
 
==Policy Based Routing==
 
===Return traffic on interface it came in on===
 
===Return traffic on interface it came in on===
Could not figure out using network manager because I am too depressed as of this writing to care. Ended up getting it working with ip commands and startup scripts.
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The key is to add routes to the interface for a dedicated table. In this example I use table 2, add the two routes needed in place of 0.0.0.0/0<ref>https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/configuring-policy-based-routing-to-define-alternative-routes</ref>.
*Create rule file, in my case it was /etc/sysconfig/network-scripts/rule-eth3
 
**Add routes to the rule file. This will state that the interface subnet is reachable on the interface using the table specified.
 
**Default route on the interface for the table, then anything coming in on that interface hits that table instead of the main table.
 
**Make sure to add the rule that anything coming from the interface address also goes to that table.
 
 
<pre>
 
<pre>
***.***.***.***/** dev eth3 table 2
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set ipv4.routes 0.0.0.0/1 <gateway> table=2
default via ***.***.***.*** dev eth3 table 2
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set ipv4.routes 128.0.0.0/1 <gateway> table=2
iif eth3 table 2
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set ipv4.routing-rules priority 100 to <int IP>/<prefix dev eth3 table 2
from ***.***.***.*** table 2
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set ipv4.routing-rules priority 101 iif eth3 table 2
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set ipv4.routing-rules priority 103 from <int IP> table 2
 
</pre>
 
</pre>
  

Latest revision as of 13:07, 28 August 2021

Policy Based Routing

Return traffic on interface it came in on

The key is to add routes to the interface for a dedicated table. In this example I use table 2, add the two routes needed in place of 0.0.0.0/0[1].

set ipv4.routes 0.0.0.0/1 <gateway> table=2
set ipv4.routes 128.0.0.0/1 <gateway> table=2
set ipv4.routing-rules priority 100 to <int IP>/<prefix dev eth3 table 2
set ipv4.routing-rules priority 101 iif eth3 table 2
set ipv4.routing-rules priority 103 from <int IP> table 2

Create Bridge Interface

[2]

[root@natasha ~]# nmcli con add type bridge ifname br0
[root@natasha ~]# nmcli con add type bridge-slave ifname eno1 master br0
[root@natasha ~]# nmcli con edit bridge-br0
nmcli> set ipv4.addresses 192.168.11.120/24
nmcli> set ipv4.gateway 192.168.11.1
nmcli> save
nmcli> quit
[root@natasha ~]# nmcli con up br0