Example use of BGP Models app - Juniper BGP Configuration¶
This document provides an example of generating a Juniper device's desired BGP configuration based on data stored in Nautobot using this app. A GraphQL query is used to retrieve the relevant data, which is then rendered through a Jinja2 template to produce the desired configuration.
Querying for the data¶
To retrieve BGP data, the following GraphQL query can be issued to Nautobot.
import pynautobot
import json
variables = {"device_id": "0a415303-999b-4222-88b8-ba3fef4cdc33"}
query = """
query ($device_id: ID!) {
device(id: $device_id) {
name
bgp_routing_instances {
extra_attributes
autonomous_system {
asn
}
peer_groups {
name
extra_attributes
peergroup_template {
autonomous_system {
asn
}
role {
slug
}
extra_attributes
}
address_families {
afi_safi
import_policy
export_policy
extra_attributes
}
}
endpoints {
peer_group {
name
}
source_ip {
address
}
peer {
source_ip {
address
}
autonomous_system {
asn
}
routing_instance {
autonomous_system {
asn
}
}
}
}
}
}
}
"""
nb = pynautobot.api(
url="http://localhost:8080",
token="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
)
gql = nb.graphql.query(query=query, variables=variables)
Retrieving the data¶
An example data returned from Nautobot is presented below.
{
"data": {
"device": {
"name": "ams01-edge-01",
"bgp_routing_instances": [
{
"extra_attributes": {
"auto-summary": false,
"synchronization": false
},
"autonomous_system": {
"asn": 65535
},
"peer_groups": [
{
"name": "EDGE-to-LEAF",
"extra_attributes": null,
"peergroup_template": {
"autonomous_system": null,
"role": {
"slug": "peer"
}
"extra_attributes": {}
},
"address_families": [
{
"afi_safi": "IPV4_UNICAST",
"import_policy": "BGP-LEAF-IN",
"export_policy": "BGP-LEAF-OUT",
"extra_attributes": {
"next-hop-self": true,
"send-community": true
}
}
]
},
{
"name": "EDGE-to-TRANSIT",
"extra_attributes": null,
"peergroup_template": {
"autonomous_system": null,
"extra_attributes": {
"ttl_security_hops": 1
},
"role": {
"slug": "customer"
}
},
"address_families": [
{
"afi_safi": "IPV4_UNICAST",
"import_policy": "BGP-TRANSIT-IN",
"export_policy": "BGP-TRANSIT-OUT",
"extra_attributes": {}
}
]
}
],
"endpoints": [
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.12/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.13/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.28/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.29/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.8/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.9/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.24/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.25/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.4/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.5/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.20/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.21/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.16/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.17/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-LEAF"
},
"source_ip": {
"address": "10.11.192.32/32"
},
"peer": {
"source_ip": {
"address": "10.11.192.33/32"
},
"autonomous_system": null,
"routing_instance": {
"autonomous_system": {
"asn": 4200000000
}
}
}
},
{
"peer_group": {
"name": "EDGE-to-TRANSIT"
},
"source_ip": {
"address": "104.94.128.1/29"
},
"peer": {
"source_ip": {
"address": "104.94.128.2/29"
},
"autonomous_system": {
"asn": 1299
},
"routing_instance": null
}
},
{
"peer_group": {
"name": "EDGE-to-TRANSIT"
},
"source_ip": {
"address": "104.94.128.9/29"
},
"peer": {
"source_ip": {
"address": "104.94.128.10/29"
},
"autonomous_system": {
"asn": 2914
},
"routing_instance": null
}
}
]
}
]
}
}
}
Creating a Juniper Jinja2 BGP Configuration Template¶
Following snippet represents an example Juniper BGP Configuration Template:
# Set the ASN for Routing Instance
set routing-options autonomous-system {{ data.device.bgp_routing_instances.0.autonomous_system.asn }}
# Configure Groups
{%- for peer_group in data.device.bgp_routing_instances.0.peer_groups %}
{%- if peer_group.peergroup_template.role.slug == "peer" %}
set protocols bgp group {{ peer_group.name }} type internal
{%- endif %}
{%- if peer_group.peergroup_template.role.slug == "customer" %}
set protocols bgp group {{ peer_group.name }} type external
{%- endif %}
set protocols bgp group {{ peer_group.name }} import {{ peer_group.address_families.0.import_policy }}
set protocols bgp group {{ peer_group.name }} export {{ peer_group.address_families.0.export_policy }}
{%- endfor %}
# Configure Peers
{%- for endpoint in data.device.bgp_routing_instances.0.endpoints %}
{%- if endpoint.peer.autonomous_system %}
{%- set remote_asn=endpoint.peer.autonomous_system.asn %}
{%- else %}
{%- set remote_asn=endpoint.peer.routing_instance.autonomous_system.asn %}
{%- endif %}
set protocols bgp group {{ endpoint.peer_group.name }} neighbor {{ endpoint.peer.source_ip.address | ipaddr('address') }} peer-as {{ remote_asn }}
{%- endfor %}
#
Rendering Juniper Jinja2 BGP Configuration Template with the data retrieved from GraphQL¶
Following snippet represents an example Juniper BGP Renderer Configuration:
root# show protocols bgp
group EDGE-to-LEAF {
type internal;
import BGP-LEAF-IN;
export BGP-LEAF-OUT;
local-as 4200000000;
neighbor 10.11.192.13 {
peer-as 4200000000;
}
neighbor 10.11.192.29 {
peer-as 4200000000;
}
neighbor 10.11.192.9 {
peer-as 4200000000;
}
neighbor 10.11.192.25 {
peer-as 4200000000;
}
neighbor 10.11.192.5 {
peer-as 4200000000;
}
neighbor 10.11.192.21 {
peer-as 4200000000;
}
neighbor 10.11.192.17 {
peer-as 4200000000;
}
neighbor 10.11.192.33 {
peer-as 4200000000;
}
}
group EDGE-to-TRANSIT {
type external;
import BGP-TRANSIT-IN;
export BGP-TRANSIT-OUT;
neighbor 104.94.128.2 {
peer-as 1299;
}
neighbor 104.94.128.10 {
peer-as 2914;
}
}
[edit]
root# show routing-options
autonomous-system 65535;
[edit]