Special Consideration When Using 802.1ad Encapsulation

It seems certain that 802.1ad devices do not populate the outer tag EtherType with 0x88A8. Special change is required in user data to interoperate with these devices.

Assuming a Management VRF is configured with S-Tag: 20 and C-Tag: 100, edit the vrf_vlan section in / etc/ config/ gatewayd as follows. Also, define resp_mode to 1 so that the SD-WAN Gateway will relax its check to allow Ethernet frames that have incorrect EtherType of 0x8100 in the outer header.

#cloud-config
hostname: #_Hostname_#
password: #_Console_Password_#
chpasswd: {expire: False}
ssh_pwauth: True
ssh_authorized_keys:
- #_SSH_public_Key_#
runcmd:
- 'echo "[]" > /opt/vc/etc/vc_blocked_subnets.json'
- 'sed -iorig "s/wan=\".*/wan=\"eth0 eth1\"/" /etc/config/gatewayd-tunnel'
- '/var/lib/cloud/scripts/per-boot/config_gateway'
- 'sleep 10'
- '/opt/vc/bin/vc_procmon restart'
write_files:
- path: "/var/lib/cloud/scripts/per-boot/config_gateway"
permissions: '0777'
content: |
#!/usr/bin/python
import json
import commands
is_activated = commands.getoutput("/opt/vc/bin/is_activated.py")
if "True" in str(is_activated):
print "Gateway already activated"
exit
commands.getoutput("/opt/vc/bin/activate.py -s #_VCO_# #_Activation_Key_# ")
 
### EDIT GATEWAYD ###
with open("/etc/config/gatewayd", "r") as jsonFile:
data = json.load(jsonFile)
data["global"]["vcmp.interfaces"] = ["eth0"]
data["global"]["wan"] = ["eth1"]
# NOTE FOR HAND OFF IT CAN BE “QinQ (0x8100)” “QinQ (0x9100)” “none” “802.1Q” “802.1ad”
 data["vrf_vlan"]["tag_info"][0]["resp_mode"] = "1" 
data["vrf_vlan"]["tag_info"][0]["mode"] = "#_Handoff_"
data["vrf_vlan"]["tag_info"][0]["interface"] = "eth1"
data["vrf_vlan"]["tag_info"][0]["c_tag"] = "#_C_TAG_FOR_MGMT_VRF_#"
data["vrf_vlan"]["tag_info"][0]["s_tag"] = "#_S_TAG_FOR_MGMT_VRF_"
with open("/etc/config/gatewayd", "w") as jsonFile:
jsonFile.write(json.dumps(data,sort_keys=True,indent=4, separators=(",", ": ")))
 
### EDIT DPDK ###
with open("/opt/vc/etc/dpdk.json", "r") as jsonFile:
data = json.load(jsonFile)
#SET 0 or 1 for enabled or DISABLED example data["dpdk_enabled"] = 0
data["dpdk_enabled"] = #_DKDP_ENABLED_OR_DISABLED_#
with open("/opt/vc/etc/dpdk.json", "w") as jsonFile:
jsonFile.write(json.dumps(data,sort_keys=True,indent=4, separators=(",", ": ")))
final_message: "==== Cloud-init completed ===="
power_state:
delay: "+1"
mode: reboot
message: Bye Bye
timeout: 30
condition: True