srl-mpls-iot

MPLS interop with SROS and VMX

Installation steps

• Clone vrnetlab
• Copy Junos VMX .tgz image to vrnetlab/vmx and run 'make' in that directory -> produces vrnetlab/vr-vmx
• Copy SROS .qcow2 image to vrnetlab/sros and name it like sros-vm-<release>.qcow2 -> produces vrnetlab/vr-sros:21.7.R2

Update Linux kernel to 5.x

Networking

Before using docker-compose to bring up netbox, add the following:

networks:
  default:
    driver: bridge
    external: true
    name: clab

This ensures the netbox containers are connected to the Containerlab bridge

Populating Netbox

Netbox agent is a Python based tool for automatically populating Netbox with device inventory information.

pip3 install netbox-agent

To test, register the local server with Netbox (after creating a token):

python3 -m netbox_agent.cli --register --netbox.url http://localhost:8000 --netbox.token x --update-all

There is a script to populate device types:

scripts/populate_netbox_device_types.py --vendors nokia

Adding files to SROS qcow2 image

For example: a license file or Python packages

guestfish --rw -a ./sros-vm-21.7.R2.qcow2 -m /dev/sda1 copy-in ./sros.license /

guestfish --rw -a ./sros-vm-21.7.R2.qcow2 -m /dev/sda1 copy-in /usr/local/lib/python3.6/site-packages/pynetbox / 

PySROS demo

SROS can now execute Python scripts, for example:

A:admin@dcgw1# pyexec tftp://172.31.255.29/pysros-demo.py
dcgw1

The setup uses vrnetlab VMs which run a TFTP server inside the container hosting the SROS VM. Each VM has the same IP

Fixing TCP offload

For some reason Netbox containers cannot talk to SRL nodes, tcpdump shows checksum errors. To fix:

containerlab tools disable-tx-offload -c netbox-docker_netbox_1

gNMI towards SROS nodes

After configuring AAA profiles following this snippet, we can make gNMI queries:

gnmic -a clab-mpls-iot-lab-dcgw1 -u grpc -p super_secret\! -e json_ietf --insecure get --path /

Similarly, for Junos:

gnmic -a clab-mpls-iot-lab-vmx1 -u admin -p admin@123 -e json_ietf --insecure get --path /

Netbox onboarding plugin

At https://github.com/networktocode/ntc-netbox-plugin-onboarding there is an onboarding plugin that could be added as another means to operationalize SROS devices quickly, see https://github.com/netbox-community/netbox-docker/wiki/Using-Netbox-Plugins on how to add