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title	Create configuration files for router: freerouter

FreeRouter uses 2 configuration files in order to run, let's write these configuration files for R1 in ~/freeRouter/etc

Code Block

language	bash
theme	Midnight
title	freeRouter hardware configuration file: p4-freerouter-hw.txt

int eth0 eth 0000.1111.00fb 127.0.0.1 22710 127.0.0.1 22709
tcp2vrf 2323 v1 23
tcp2vrf 9080 v1 9080

Code Block

language	bash
theme	Midnight
title	freeRouter software configuration file: p4-freerouter-sw.txt

hostname p4-freerouter
buggy
!
!
prefix-list p4
 sequence 10 permit 0.0.0.0/0 ge 0 le 0
 exit
!
prefix-list p6
 sequence 10 permit ::/0 ge 0 le 0
 exit
!
vrf definition v1
 exit
!
interface ethernet0
 description freerouter@P4_CPU_PORT[veth251]
 no shutdown
 no log-link-change
 exit
!
interface sdn1
 description freerouter@sdn1[enp0s3]
 mtu 9000
 macaddr 0072.3e18.1b6f
 vrf forwarding v1
 ipv4 address 192.168.0.131 255.255.255.0
 ipv6 address 2a01:e0a:159:2850::666 ffff:ffff:ffff:ffff::
 ipv6 enable
 no shutdown
 no log-link-change
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
server telnet tel
 security protocol telnet
 no exec authorization
 no login authentication
 vrf v1
 exit
!
server p4lang p4
 export-vrf v1 1
 export-port sdn1 1 0
 interconnect ethernet0
 vrf v1
 exit
!
client tcp-checksum transmit
!
end

Expand

title	Launch freeRouter control plane along side TOFINO P4 dataplane

Code Block

language	bash
theme	Midnight
title	Setup bf_switchd dataplane communication channel via veth pair and interface adjustment (disable IPv6 at VM guest level, MTU 10240, disable TCP offload etc.)

echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6

ip link add veth251 type veth peer name veth250
ip link set veth250  up 
ip link set veth251  up 

ifconfig enp0s3 promisc
ifconfig veth250 promisc
ifconfig veth251 promisc

ip link set dev veth250 up mtu 10240
ip link set dev veth251 up mtu 10240
ip link set dev enp0s3 up mtu 10240
export TOE_OPTIONS="rx tx sg tso ufo gso gro lro rxvlan txvlan rxhash"

for TOE_OPTION in $TOE_OPTIONS; do
    /sbin/ethtool --offload veth250 "$TOE_OPTION" off &> /dev/null
    /sbin/ethtool --offload veth251 "$TOE_OPTION" off &> /dev/null
    /sbin/ethtool --offload enp0s3 "$TOE_OPTION" off &> /dev/null
done

Code Block

language	bash
theme	Midnight
title	freeRouter launch with supplied p4-freerouter-hw.txt and p4-freerouter-sw.txt with a console prompt

java -jar lib/rtr.jar routersc etc/p4-freerouter-hw.txt etc/p4-freerouter-sw.txt
info cfg.cfgInit.doInit:cfgInit.java:556 booting
info cfg.cfgInit.doInit:cfgInit.java:680 initializing hardware
info cfg.cfgInit.doInit:cfgInit.java:687 applying defaults
info cfg.cfgInit.doInit:cfgInit.java:695 applying configuration
info cfg.cfgInit.doInit:cfgInit.java:721 done
welcome
line ready
freerouter#

Code Block

language	bash
theme	Midnight
title	launch freeRouter pcapInt in order to stitch control plane and P4Emu/pcap dataplane communication

cd ~/freeRouter/bin
./pcapInt.bin veth251 22709 127.0.0.1 22710 127.0.0.1
binded to local port 127.0.0.1 22709.
will send to 127.0.0.1 22710.
pcap version: libpcap version 1.8.1
opening interface veth251 with pcap1.x api
serving others
>

Code Block

language	bash
theme	Midnight
title	Launch P4Emu/pcap software dataplane

sudo ./p4emu.bin  127.0.0.1 9080 0 veth250 enp0s3
cpu port is #0 of 2...
pcap version: libpcap version 1.8.1
connecting 127.0.0.1 9080.
opening interface veth250.
opening interface enp0s3.
rx: 'myaddr4' 'add' '224.0.0.0' '4' '0' '1' '' 
rx: 'myaddr4' 'add' '255.255.255.255' '32' '0' '1' '' 
rx: 'myaddr6' 'add' 'ff00::' '8' '0' '1' '' 
rx: 'myaddr4' 'add' '192.168.0.0' '24' '-1' '1' '' 
rx: 'myaddr4' 'add' '192.168.0.131' '32' '-1' '1' '' 
rx: 'myaddr6' 'add' '2a01:e0a:159:2850::' '64' '-1' '1' '' 
rx: 'myaddr6' 'add' '2a01:e0a:159:2850::666' '128' '-1' '1' '' 
rx: 'myaddr6' 'add' 'fe80::' '64' '-1' '1' '' 
rx: 'mylabel4' 'add' '615589' '1' '' 
rx: 'mylabel6' 'add' '1036348' '1' '' 
rx: 'state' '1' '1' '0' '' 
rx: 'mtu' '1' '9000' '' 
rx: 'portvrf' 'add' '1' '1' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'neigh6' 'add' '11120' 'fe80::224:d4ff:fea0:cd3' '00:24:d4:a0:0c:d3' '1' '00:72:3e:18:1b:6f' '1' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'neigh4' 'add' '29738' '192.168.0.254' '00:24:d4:a0:0c:d3' '1' '00:72:3e:18:1b:6f' '1' '' 
rx: 'keepalive' '' 
rx: 'neigh4' 'add' '40470' '192.168.0.62' 'e0:3f:49:6d:18:99' '1' '00:72:3e:18:1b:6f' '1' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'keepalive' '' 
rx: 'neigh6' 'add' '45820' '2a01:e0a:159:2850:e23f:49ff:fe6d:1899' 'e0:3f:49:6d:18:99' '1' '00:72:3e:18:1b:6f' '1' '' 
rx: 'keepalive' '' 
rx: 'neigh6' 'add' '49055' 'fe80::e23f:49ff:fe6d:1899' 'e0:3f:49:6d:18:99' '1' '00:72:3e:18:1b:6f' '1' '' 
rx: 'neigh6' 'add' '33334' '2a01:e0a:159:2850::
...

...

Expand

title	Check running-config

Code Block

language	bash
theme	Midnight
title	freerouter running configuration

p4-freerouter#term len 0                                                       
p4-freerouter#sh run                                                           
hostname p4-freerouter
buggy
!
vrf definition v1
 exit
!
interface ethernet0
 description freerouter@P4_CPU_PORT[veth251]
 no shutdown
 no log-link-change
 exit
!
interface sdn1
 description freerouter@sdn1[enp0s3]
 mtu 9000
 macaddr 0072.3e18.1b6f
 vrf forwarding v1
 ipv4 address 192.168.0.131 255.255.255.0
 ipv6 address 2a01:e0a:159:2850::666 ffff:ffff:ffff:ffff::
 ipv6 enable
 no shutdown
 no log-link-change
 exit
!
!
!
!
!
!
!
!
!
!
!
!
!
!
server telnet tel
 security protocol telnet
 no exec authorization
 no login authentication
 vrf v1
 exit
!
server p4lang p4
 export-vrf v1 1
 export-port sdn1 1 0
 interconnect ethernet0
 vrf v1
 exit
!
client tcp-checksum transmit
!
end

Code Block

language	bash
theme	Midnight
title	Check control plane is communicating with bf_switchd p4 dataplane

p4-freerouter#show interfaces summary                                          
interface  state  tx    rx      drop
ethernet0  up     8739  404545  0
sdn1       up     8535  400013  0

...

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