test: Verify ieee-group-forward LLDP

2026-08-02 13:53:01 +02:00 · 2025-05-13 16:58:57 +02:00
parent 2cbba5cf1f
commit 50a94e8175
7 changed files with 254 additions and 0 deletions
@@ -11,6 +11,8 @@ include::lldp_enable_disable/Readme.adoc[]

 include::lldp_admin_status/Readme.adoc[]

+include::lldp_ieee_group_forward/Readme.adoc[]
+
 include::ssh_server_config/Readme.adoc[]

 include::ssh_key_authentication/Readme.adoc[]
@@ -4,3 +4,6 @@

 - name: lldp_admin_status
  case: lldp_admin_status/test.py
+
+- name: lldp_ieee_group_forward
+  case: lldp_ieee_group_forward/test.py
@@ -0,0 +1 @@
+lldp_ieee_group_forward.adoc
@@ -0,0 +1,28 @@
+=== LLDP IEEE Group Forward
+==== Description
+Verify that LLDP packets can be flooded to all ports on a bridge.
+Operation and non-operation are confirmed using tcpdump.
+
+==== Topology
+ifdef::topdoc[]
+image::{topdoc}../../test/case/infix_services/lldp_ieee_group_forward/topology.svg[LLDP IEEE Group Forward topology]
+endif::topdoc[]
+ifndef::topdoc[]
+ifdef::testgroup[]
+image::lldp_ieee_group_forward/topology.svg[LLDP IEEE Group Forward topology]
+endif::testgroup[]
+ifndef::testgroup[]
+image::topology.svg[LLDP IEEE Group Forward topology]
+endif::testgroup[]
+endif::topdoc[]
+==== Test sequence
+. Set up topology and attach to target DUT
+. Enable target interfaces and create bridge
+. Disable LLDP on target
+. Verify LLDP absence on host:data2
+. Enable LLDP flooding by setting group forward
+. Verify LLDP arrival on host:data2
+
+
+<<<
+
@@ -0,0 +1,145 @@
+#!/usr/bin/env python3
+
+"""LLDP IEEE Group Forward
+
+Verify that LLDP packets can be flooded to all ports on a bridge.
+Operation and non-operation are confirmed using tcpdump.
+"""
+
+import time
+import threading
+import infamy
+
+from scapy.all import Ether, sendp
+from scapy.contrib.lldp import (
+    LLDPDU, LLDPDUChassisID, LLDPDUPortID, 
+    LLDPDUTimeToLive, LLDPDUEndOfLLDPDU
+)
+
+SNIFFING_DURATION = 3
+
+LLDP_INTERVAL = 1
+LLDP_TTL = 3
+LLDP_MULTICAST_MAC = "01:80:C2:00:00:0E"
+LLDP_ETHERTYPE = 0x88cc
+
+CHASSIS_ID = "Chassis-Test"
+SRC_MAC = "02:01:02:03:04:05"
+
+BRIDGE = "br0"
+
+def send_lldp_packet(iface):
+    eth = Ether(src=SRC_MAC, dst=LLDP_MULTICAST_MAC, type=LLDP_ETHERTYPE)
+    lldpdu = eth / LLDPDU()
+    lldpdu /= LLDPDUChassisID(subtype=7, id=CHASSIS_ID)
+    lldpdu /= LLDPDUPortID(subtype=5, id=iface)
+    lldpdu /= LLDPDUTimeToLive(ttl=LLDP_TTL)
+    lldpdu /= LLDPDUEndOfLLDPDU()
+    sendp(lldpdu, iface=iface, verbose=False)
+
+def send_lldp_packets_continuously(iface, stop_event):
+    time.sleep(LLDP_INTERVAL/2)
+    while not stop_event.is_set():
+        send_lldp_packet(iface)
+        time.sleep(LLDP_INTERVAL)
+
+def capture_traffic(iface):
+    with infamy.IsolatedMacVlan(iface) as netns:
+        sniffer = infamy.Sniffer(netns, f"ether proto {LLDP_ETHERTYPE}")
+        with sniffer:
+            time.sleep(SNIFFING_DURATION)
+        return sniffer.output()
+
+def start_lldp_sender_thread(iface):
+    stop = threading.Event()
+    thread = threading.Thread(
+        target=send_lldp_packets_continuously,
+        args=(iface, stop)
+    )
+    thread.start()
+    return stop, thread
+
+with infamy.Test() as test:
+    with test.step("Set up topology and attach to target DUT"):
+        env = infamy.Env()
+        target = env.attach("target", "mgmt")
+        _, hdata1 = env.ltop.xlate("host", "data1")
+        _, hdata2 = env.ltop.xlate("host", "data2")
+
+    with test.step("Configure interfaces and disable LLDP daemon"):
+        target.put_config_dicts({
+            "ietf-interfaces": {
+                "interfaces": {
+                    "interface": [
+                        {
+                            "name": BRIDGE,
+                            "type": "infix-if-type:bridge",
+                            "enabled": True,
+                        },
+                        {
+                            "name": target["data1"],
+                            "enabled": True,
+                            "infix-interfaces:bridge-port": {
+                                "bridge": "br0"
+                            }
+                        },
+                        {
+                            "name": target["data2"],
+                            "enabled": True,
+                            "infix-interfaces:bridge-port": {
+                                "bridge": "br0"
+                            }
+                        }
+                    ]
+                }
+            },
+            "ieee802-dot1ab-lldp": {
+                "lldp": {
+                    "enabled": False
+                }
+            }
+        })
+
+    stop_event, sender_thread = start_lldp_sender_thread(hdata1)
+
+    try:
+        with test.step("Verify LLDP absence on host:data2"):
+            captured_traffic = capture_traffic(hdata2)
+            if "LLDP" in captured_traffic.stdout:
+                test.fail()
+
+    finally:
+        stop_event.set()
+        sender_thread.join()
+
+    with test.step("Enable LLDP flooding by setting group forward"):
+        target.put_config_dicts({
+            "ietf-interfaces": {
+                "interfaces": {
+                    "interface": [
+                        {
+                            "name": BRIDGE,
+                            "infix-interfaces:bridge": {
+                                "ieee-group-forward": [
+                                    "lldp"
+                                ]
+                            }
+                        }
+                    ]
+                }
+            }
+        })
+
+    stop_event, sender_thread = start_lldp_sender_thread(hdata1)
+
+    try:
+        with test.step("Verify LLDP arrival on host:data2"):
+            captured_traffic = capture_traffic(hdata2)
+            if "LLDP" not in captured_traffic.stdout:
+                test.fail()
+
+    finally:
+        stop_event.set()
+        sender_thread.join()
+
+    test.succeed()
@@ -0,0 +1,24 @@
+graph "1x3" {
+	layout="neato";
+	overlap="false";
+	esep="+80";
+
+	node [shape=record, fontname="DejaVu Sans Mono, Book"];
+	edge [color="cornflowerblue", penwidth="2", fontname="DejaVu Serif, Book"];
+
+	host [
+		label="host | { <mgmt> mgmt | <data1> data1 | <data2> data2 }",
+		pos="0,12!",
+		requires="controller",
+	];
+
+	target [
+		label="{ <mgmt> mgmt | <data1> data1 | <data2> data2 } | target",
+		pos="10,12!",
+		requires="infix",
+	];
+
+	host:mgmt -- target:mgmt [requires="mgmt", color="lightgray"]
+	host:data1 -- target:data1 [color="black", requires="ieee-mc"]
+	host:data2 -- target:data2 [color="black", requires="ieee-mc"]
+}
@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
+ "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+
+<!-- Title: 1x3 Pages: 1 -->
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+ viewBox="0.00 0.00 440.03 78.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 74)">
+<title>1x3</title>
+<polygon fill="white" stroke="transparent" points="-4,4 -4,-74 436.03,-74 436.03,4 -4,4"/>
+<!-- host -->
+<g id="node1" class="node">
+<title>host</title>
+<polygon fill="none" stroke="black" points="0,-0.5 0,-69.5 108,-69.5 108,-0.5 0,-0.5"/>
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+<text text-anchor="middle" x="79" y="-8.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">data2</text>
+</g>
+<!-- target -->
+<g id="node2" class="node">
+<title>target</title>
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+<text text-anchor="middle" x="337.03" y="-54.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
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+<text text-anchor="middle" x="399.03" y="-31.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">target</text>
+</g>
+<!-- host&#45;&#45;target -->
+<g id="edge1" class="edge">
+<title>host:mgmt&#45;&#45;target:mgmt</title>
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+</g>
+<!-- host&#45;&#45;target -->
+<g id="edge2" class="edge">
+<title>host:data1&#45;&#45;target:data1</title>
+<path fill="none" stroke="black" stroke-width="2" d="M108,-35C108,-35 308.03,-35 308.03,-35"/>
+</g>
+<!-- host&#45;&#45;target -->
+<g id="edge3" class="edge">
+<title>host:data2&#45;&#45;target:data2</title>
+<path fill="none" stroke="black" stroke-width="2" d="M108,-12C108,-12 308.03,-12 308.03,-12"/>
+</g>
+</g>
+</svg>