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How to configure bridging to capture packets on multiple interfaces on RHEL 8
nomorespice edited this page Apr 15, 2021
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This procedure will guide you through the configuration of interface bridging on a Red Hat Enterprise Linux 8 server.
This document assumes that:
- you installed the RHEL 8 x64 Operating System according to How to install RHEL 8 via kickstart
- you are performing these tasks as root
- you are performing these tasks in order, as some tasks require others to be completed first
- your network device is a Cisco Nexus
This configuration assumes the uplink ports are e1/1-e1/2 and your RHEL 8 system is connected to e1/3 on both switches.
monitor session 1
source interface Ethernet1/1 both
source interface Ethernet1/2 both
destination interface Ethernet1/3
no shut
interface Ethernet1/3
description monitor port
switchport monitor
This configuration assumes the interfaces that are connected to e1/3 on both switches are eth2/eth3.
nmcli connection add type bridge con-name br0 ifname br0
nmcli connection modify br0 ipv4.addresses '192.168.2.1/24'
nmcli connection modify br0 ipv4.method manual
nmcli connection modify br0 connection.autoconnect-slaves 1
nmcli con modify br0 bridge.stp no
nmcli connection modify eth2 master br0
nmcli connection modify eth3 master br0
nmcli connection up br0