topotato: wip test_bgp_local_as_private_remove.py

Signed-off-by: Nathan Mangar <[email protected]>

Author: Chromico

test_bgp_local_as_private_remove.py

@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# Copyright (C) 2023 Nathan Mangar
+
+"""
+bgp_local_as_private_remove.py:
+Test if primary AS number is not removed in cases when `local-as`
+used together with `remove-private-AS`.
+"""
+
+
+__topotests_file__ = "bgp_local_as_private_remove/test_bgp_local_as_private_remove.py"
+__topotests_gitrev__ = "acddc0ed3ce0833490b7ef38ed000d54388ebea4"
+
+# pylint: disable=invalid-name, missing-class-docstring, missing-function-docstring, line-too-long, consider-using-f-string, wildcard-import, unused-wildcard-import, f-string-without-interpolation, too-few-public-methods
+
+from topotato import *
+
+
+@topology_fixture()
+def topology(topo):
+    """
+            [ r1 ]
+              |
+    [ r4 ]--{ s1 }--[ r2 ]
+      |       |
+    { s2 }--[ r3 ]
+    """
+
+    topo.router("r1").lo_ip4.append("172.16.255.254/32")
+    topo.router("r3").lo_ip4.append("172.16.255.255/32")
+    topo.router("r1").iface_to("s1").ip4.append("192.168.255.1/24")
+    topo.router("r2").iface_to("s1").ip4.append("192.168.255.2/24")
+    topo.router("r3").iface_to("s1").ip4.append("192.168.255.1/24")
+    topo.router("r4").iface_to("s1").ip4.append("192.168.255.3/24")
+
+
+class Configs(FRRConfigs):
+    routers = ["r1", "r2", "r3", "r4"]
+
+    zebra = """
+    #% extends "boilerplate.conf"
+    #% block main
+    #%   for iface in router.ifaces
+    interface {{ iface.ifname }}
+     ip address {{ iface.ip4[0] }}
+    !
+    #%   endfor
+    ip forwarding
+    !
+    #% endblock
+    """
+
+    bgpd = """
+    #% block main
+    #%   if router.name == 'r1'
+    router bgp 65000
+    no bgp ebgp-requires-policy
+    neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} remote-as 1000
+    neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} timers 3 10
+    neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} local-as 500
+    address-family ipv4 unicast
+     neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} remove-private-AS
+     redistribute connected
+     exit-address-family
+    !
+    #%   elif router.name == 'r2'
+    router bgp 1000
+     no bgp ebgp-requires-policy
+     neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} remote-as 500
+     neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} timers 3 10
+    !
+    #%   elif router.name == 'r3'
+    router bgp 3000
+     no bgp ebgp-requires-policy
+     neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} remote-as 1000
+     neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} timers 3 10
+     neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} local-as 500
+     address-family ipv4 unicast
+      neighbor {{ routers.r2.iface_to('s1').ip4[0].ip }} remove-private-AS
+      redistribute connected
+     exit-address-family
+    !
+    #%   elif router.name == 'r4'
+    router bgp 1000
+     no bgp ebgp-requires-policy
+     neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} remote-as 500
+     neighbor {{ routers.r1.iface_to('s1').ip4[0].ip }} timers 3 10
+    !
+    #%   endif
+    #% endblock
+    """
+
+
+class BGPLocalAsPrivateRemove(TestBase, AutoFixture, topo=topology, configs=Configs):
+    @topotatofunc
+    def bgp_converge(self, _, r1, r2):
+        expected = {
+            str(r1.iface_to("s1").ip4[0].ip): {
+                "bgpState": "Established",
+            }
+        }
+        yield from AssertVtysh.make(
+            r2,
+            "bgpd",
+            f"show ip bgp neighbor {r1.iface_to('s1').ip4[0].ip} json",
+            maxwait=5.0,
+            compare=expected,
+        )
+
+    @topotatofunc
+    def bgp_as_path_r2(self, _, r1, r2):
+        expected = {
+            "paths": [
+                {
+                    "aspath": {
+                        "string": "500",
+                        "length": 1,
+                    }
+                }
+            ]
+        }
+        yield from AssertVtysh.make(
+            r2,
+            "bgpd",
+            f"show ip bgp 172.16.255.254/32 json",
+            maxwait=5.0,
+            compare=expected,
+        )
+
+    @topotatofunc
+    def bgp_as_path_r4(self, _, r1, r2, r4):
+        expected = {
+            "paths": [
+                {
+                    "aspath": {
+                        "string": "500 3000",
+                        "length": 2,
+                    }
+                }
+            ]
+        }
+        yield from AssertVtysh.make(
+            r4,
+            "bgpd",
+            f"show ip bgp 172.16.255.254/32 json",
+            maxwait=5.0,
+            compare=expected,
+        )