Routing Hardware - EspressoBIN 👎

[darkdrgn2k]

^{This initial comment is collaborative and open to modification by all.}

Task Summary

🎟️ Re-ticketed from: #
📅 Due date: N/A
🎯 Success criteria: Instructions to build a working espressoBIN router for babeld

😕 Found u-boot hung a few times. I was messing with it at the time but still not a good thing
✔️ Able to re-flash from uboot
✔️ Almost full gig transfer when direct connection
✔️ Almost full gig transfer when bridging
❌ Routed dropped down to ~350Mbps
❌ A reboot can cause it to enter into a UBOOT freeze and requires to be power cycled.

To Do

• Figure out how to flash without taking out SD card
• Benchmark Router
• Figure out config for roof-top router

[darkdrgn2k]

EspressoBIN v7 comes with a weird case that you cannot remove the SD card without unscrewing the whole thing. Having the ability to field-reflash the sd card without removing it would be a huge time saver.

By inserting a FAT formatted USB drive with an image into USB port you can re-flash the SD card from the SERIAL CONSOLE over U-BOOT

• The image is to big to fit all into memory so you need to flash it in two chunks.
• fatload uses bytes in hex
• mmc write uses blocks in hex
• blocks are bytes/512 (or bytes/0x200 if in hex)

${loadaddr} is a position in RAM where you can dump stuff.

# Enable USB 
usb start

# Load first part (0x35000000‬ bytes) of the image into memory starting at position 0
fatload usb 0 ${loadaddr}  Armbian_20.05.2_Espressobin_buster_current_4.19.126.img 35000000‬ 0
# Write from memory into MMC position  0 0x1A8000 Blocks
mmc write ${loadaddr} 0 1A8000
‬
# Load the remaining (0) of the file starting at 0x35000000‬ into memory 
fatload usb 0 ${loadaddr}  Armbian_20.05.2_Espressobin_buster_current_4.19.126.img 0 35000000‬

# Calculate Remainder of file starting at block 0x1A8000‬ 
# Result = "704643072 bytes read in 11818 ms (56.9 MiB/s)"
# 704643072/512 converted into HEX = 150000

# Write from memory to MMC 
mmc write ${loadaddr} 1A8000‬ 150000

[darkdrgn2k]

Benchmark

[iperfclient]--gige---[iperserver espressobin]
✔️ 931/Mbits/sec Mbits/sec

[iperfserver]--gige---[espressobin bridged]----iperfclient
✔️ 936/947 Mbits/sec

[iperfserver]--gige---[espressobin routed]----iperfclient
❌ 335/403 Mbits/sec

[iperfserver exit node]--gige wan---[espressobin iperfclient]
❌ 199/199 Mbits/sec MAX drops to 20

[darkdrgn2k]

Disable armbian bridging

sudo rm -rf /etc/systemd/network/*

Enable individual interfaces
wan= SECTOR1 10.0.1.1/24
lan0= SECTOR2 10.0.2.1/24
lan1= SECTOR3 10.0.3.1/24

apt-get install dnsmasq

cat <<"EOF"> /etc/network/interfaces.d/eth0
auto eth0
iface eth0 inet manual
EOF

cat <<"EOF"> /etc/network/interfaces.d/wan
auto wan
iface wan inet static
address 100.64.1.1
netmask 255.255.255.0
EOF

cat <<"EOF"> /etc/network/interfaces.d/lan0
auto lan0
iface lan0 inet static
address 100.64.2.1
netmask 255.255.255.0
EOF

cat <<"EOF"> /etc/network/interfaces.d/lan1
auto lan1
iface lan1 inet static
address 100.64.3.1
netmask 255.255.255.0
EOF

[darkdrgn2k]

Babeld

wget http://node2.meshwithme.online/deb/repos/apt/debian/pool/main/b/babeld/babeld_1.9.1-dirty_arm64.deb
dpkg -i babeld_1.9.1-dirty_arm64.deb    

cat <<"EOF"> /etc/babeld.conf
interface wan
interface lan0
interface lan1
redistribute if wan
redistribute if lan0
redistribute if wan1
redistribute deny
EOF

[darkdrgn2k]

Wire Guard

apt-get install wireguard

wg genkey > privatekey
privatekey=$(cat privatekey)
publickey=$(wg pubkey < privatekey)

cat <<EOF> /etc/wireguard/wg-100-127-0-4.conf
[Interface]
Address = 100.127.0.4/32
Address = fe80::c4bc:2128:a33f:991/64
PrivateKey = $privatekey

[Peer]
PublicKey = 1zR1mOMjfzyEtnJk5eafvKiuh1HdjD7dGJxWVO5mmTA=
AllowedIPs = 0.0.0.0/0
AllowedIPs = ::/0
PersistentKeepalive = 25
Endpoint = 199.195.250.209:51444
EOF

systemctl start wg-quick@wg-100-127-0-4
systemctl enable wg-quick@wg-100-127-0-4

Add this to /etc/babeld.conf

interface wg-10-127-0-4
redistribute if wg-10-127-0-4

[darkdrgn2k]

Router is not stable enough for field work. A reboot can cause it to enter into a UBOOT freeze and requires to be power cycled.