diff options
| -rwxr-xr-x | trex_book.asciidoc | 63 |
1 files changed, 60 insertions, 3 deletions
diff --git a/trex_book.asciidoc b/trex_book.asciidoc index 6b0db870..b58651ca 100755 --- a/trex_book.asciidoc +++ b/trex_book.asciidoc @@ -1699,6 +1699,64 @@ enabled=0 * Reboot +=== Configure Linux host as network emulator + +There are lots of Linux tutorials on the web, so this will not be full tutorial, only highlighting some key points. Commands +were checked on Ubuntu system. + +==== Enable forwarding +One time (will be discarded after reboot): + +[source,bash] +---- +echo 1 > /proc/sys/net/ipv4/ip_forward +---- +To make this permanent, add the following line to the file /etc/sysctl.conf: + +---- +net.ipv4.ip_forward=1 +---- + +==== Add static routes +Example if for the default TRex networks, 48.0.0.0 and 16.0.0.0. + +Routing all traffic from 48.0.0.0 to the gateway 10.0.0.100 +[source,bash] +---- +route add -net 48.0.0.0 netmask 255.255.0.0 gw 10.0.0.100 +---- + +Routing all traffic from 16.0.0.0 to the gateway 172.168.0.100 +[source,bash] +---- +route add -net 16.0.0.0 netmask 255.255.0.0 gw 172.168.0.100 +---- +If you use stateless mode, and decide to add route only in one direction, remember to disable reverse path check. + +For example, to disable on all interfaces: +[source,bash] +---- +for i in /proc/sys/net/ipv4/conf/*/rp_filter ; do + echo 0 > $i +done +---- + +Alternatively, you can edit /etc/network/interfaces, and add something like this for both ports connected to TRex. +This will take effect, only after restarting networking (rebooting the machine in an alternative also). +---- +auto eth1 +iface eth1 inet static +address 16.0.0.100 +netmask 255.0.0.0 +network 16.0.0.0 +broadcast 16.255.255.255 +... same for 48.0.0.0 +---- + +==== Add static ARP entries +[source,bash] +---- +sudo arp -s 10.0.0.100 <Second TRex port MAC> +sudo arp -s 172.168.0.100 <TRex side the NICs are not visible to ifconfig, run: +---- + === Troubleshoot common problems, FAQ Q: During OS installation, screen is skewed / error "Out of range" / resolution not supported etc. + @@ -1734,8 +1792,7 @@ sudo ./dpdk_nic_bind.py -b <driver name> <1> <PCI address> <2> We are planning to add MACs to `./dpdk_setup_ports.py -s` ===================================== - -Q: TRex traffic doesn't show up on Wireshark, So I can't capture the traffic from the TRex port + -A: TRex uses DPDK that take ownership on the ports. We are using a Switch with port mirroring to capture the traffic +Q: TRex traffic does not show up on Wireshark, so I can not capture the traffic from the TRex port + +A: TRex uses DPDK which takes ownership of the ports, so using Wireshark is not possible. You can use switch with port mirroring to capture the traffic. |