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Change MTU on iSCSI interfaces


Ste
133 Posts
March 17, 2025, 11:44 am

Hello,

i'm trying to change the MTU to 9000 on iSCSI interfaces (eth3 and eth5), which were left to 1500 at installation time. I went to the file /opt/petasan/config/etc/network/interfaces, but i see only the management interface:

auto eth2
iface eth2 inet static
address 10.0.2.131
netmask 255.255.252.0
gateway 10.0.2.1
dns-nameservers 10.0.2.11

I guess i should add a section dedicated to eth3 and eth5, but I cannot set it as static neither dhcp, i'm afraid. Is there another way to do it in PetaSAN ?
Thanks and bye,  Ste

Last edited on March 17, 2025, 11:45 am by Ste · #1

admin
2,957 Posts
March 18, 2025, 1:07 am

network configuration is in

/opt/petasan/config/cluster_info.json

It is pretty easy to follow, but it may be easier to create a test vm, deploy it with desired network configuration then grab the above file.

/etc/network/interfaces is only used during node boot.

 

#2

Ste
133 Posts
March 26, 2025, 10:43 am

Ok, after changing this file do i need to reboot the nodes ?

Thanks, Ste

#3

admin
2,957 Posts
March 26, 2025, 3:58 pm

yes, you should also make sure you set them on switch ports and on your clients.

#4