CentOS7 And Vlan
Hi all. I wonder if you can help me here.
I have CentOS7 with 1 network interface and on that IFwe have 2 vlan. From both vlan we’d like to reach the internet independently so basically with 2 different gateways.
we tried with all the routes,rules etc but only on one vlan we are able to ping 8.8.8.8 for instance.
Any suggestions/ideas?
Cheers
4 thoughts on - CentOS7 And Vlan
if you use more than one gateway, you have to ‘decide’ what traffic you want to go through each of them, (so you have to set up routes or
user/group pools that controls access to interfaces etc ) it would still be a good idea to call one of the interfaces/gateways the
“route of last resort”, but bad ideas might work too.
Did you setup outbound NAT for both vlans via iptables?
Policy routing to multiple wan interfaces is a bit tricky,. It’s been years since I did it, what I remember was using ip rules to categorize and tag the traffic, then alternate named ip route tables to direct the different tags at different gateways.
Look for documentation on “multi-homing”:
https://blogs.oracle.com/networking/advance-routing-for-multi-homed-hosts
Thanks guys. I ll go through all your recò and links tomorrow and let you know. I might post my configuration so you can have a look at it. Cheers
/Alfredo
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