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Lower throughput in a Bridge created as a Ethernet Switch in a Ubuntu Server -

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The setup is given below. I have a server with NIC(eth0 and eth1). I have created a bridge br0. The idea is I want to send the packets received from eth0 via br0 to eth1.

(Laptop)__________Ubuntu Server___________(Laptop)

Iperf Server-----------eth0--br0--eth1-------------------Iperf client

the throughput at eth0 is 5 Gbps where as at eth1 I am receiving only 3 Gbps utmost.

I followed this tutorial to create the network bridge.

STP is disabled in the bridge interface. I also disabled the packets to be sent over iptables for processing using this commands.

net.bridge.bridge-nf-call-arptables
net.bridge.bridge-nf-call-ip6tables
net.bridge.bridge-nf-call-iptables

I sit in a Tesla and translated this thread with Ai:

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