JunOS: GRE tunnel on vSRX and vJunos-router (#3573)

Author: ssasso

docs/plugins/tunnel.gre.md

@@ -11,6 +11,8 @@ The plugin includes Jinja2 templates for the following platforms:
 |--------------|:-:|:-:|:-:|
 | Cisco IOS/XE[^18v] |✅|✅|✅|
 | FRR                 |✅|✅|✅|
+| Juniper vJunos-switch |✅|✅|✅|
+| Juniper vSRX        |✅|✅|✅|
 | VyOS               |✅|✅|✅|
 
 [^18v]: Includes Cisco IOSv, Cisco IOSvL2, Cisco CSR 1000v, Cisco Catalyst 8000v, Cisco IOS-on-Linux (IOL), and IOL Layer-2 image.

netsim/devices/vjunos-router.yml

@@ -3,6 +3,7 @@ description: vJunos Router (similar to vMX)
 support:
 parent: vmx
 interface_name: ge-0/0/{ifindex}
+tunnel_interface_name: "gr-0/0/10.{ifindex}"
 group_vars:
   netlab_device_type: vjunos-router
 
@@ -13,6 +14,8 @@ features:
     multi_rt: true
     bundle: [ vlan_aware ]
     transport: [ vxlan ]
+  tunnel:
+    gre: [ vrf ]
   vlan:
     model: router
     svi_interface_name: irb.{vlan}

netsim/devices/vsrx.yml

@@ -5,6 +5,7 @@ support:
   caveats:
   - vSRX gets all new Junos features, but we don't test them on vSRX
 parent: junos
+tunnel_interface_name: "gr-0/0/0.{ifindex}"
 group_vars:
   netlab_device_type: vsrx
 
@@ -13,6 +14,8 @@ features:
     protocol: [ vrrp ]
   lag:
     passive: True
+  tunnel:
+    gre: [ vrf ]
   vlan:
     model: router
     subif_name: "{ifname}.{vlan.access_id}"

netsim/extra/tunnel.gre/junos.j2

@@ -0,0 +1,25 @@
+{% if netlab_device_type in [ 'vjunos-router' ] %}
+chassis {
+    fpc 0 {
+        pic 0 {
+            tunnel-services bandwidth 1g;
+        }
+    }
+}
+{% endif %}
+
+interfaces {
+
+{% for intf in netlab_interfaces if intf.tunnel.mode|default('') in ['gre'] %}
+    {{intf.ifname}} {
+      tunnel {
+            source {{ intf.tunnel._source[intf.tunnel.af] }};
+            destination {{ intf.tunnel._destination[intf.tunnel.af] }};
+{%   if intf.tunnel.vrf is defined %}
+            routing-instance destination {{ intf.tunnel.vrf }}
+{%   endif %}
+      }
+    }
+{% endfor %}
+
+}