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test: Verify route preference (OSPF vs Static)

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Ahmed Karic
2024-11-25 18:05:51 +01:00
parent e9fc62b365
commit e9efd224f7
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test/case/ietf_routing/Readme.adoc
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@@ -14,4 +14,6 @@ include::ospf_multiarea/Readme.adoc[]
include::ospf_bfd/Readme.adoc[]
include::route_pref_ospf/Readme.adoc[]
include::route_pref_dhcp/Readme.adoc[]
test/case/ietf_routing/ietf_routing.yaml
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@@ -13,6 +13,9 @@
- name: ospf_bfd
case: ospf_bfd/test.py
- name: route_pref_ospf
case: route_pref_ospf/test.py
- name: route_pref_dhcp
case: route_pref_dhcp/test.py
test/case/ietf_routing/route_pref_ospf/Readme.adoc
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=== Route preference: OSPF vs Static
==== Description
This test configures a device with both an OSPF-acquired route on a
dedicated interface and a static route to the same destination on
another interface. The static route has a higher preference value than
OSPF.
Initially, the device should prefer the OSPF route; if the OSPF route
becomes unavailable, the static route should take over.
==== Topology
ifdef::topdoc[]
image::../../test/case/ietf_routing/route_pref_ospf/topology.svg[Route preference: OSPF vs Static topology]
endif::topdoc[]
ifndef::topdoc[]
ifdef::testgroup[]
image::route_pref_ospf/topology.svg[Route preference: OSPF vs Static topology]
endif::testgroup[]
ifndef::testgroup[]
image::topology.svg[Route preference: OSPF vs Static topology]
endif::testgroup[]
endif::topdoc[]
==== Test sequence
. Set up topology and attach to target DUTs
. Set up TPMR between R1ospf and R2ospf
. Configure targets
. Set up persistent MacVlan namespaces
. Wait for OSPF and static routes
. Verify connectivity from PC:data1 to PC:data2 via OSPF
. Simulate OSPF route loss by blocking OSPF interface
. Verify connectivity via static route after OSPF failover
<<<
test/case/ietf_routing/route_pref_ospf/test.py
Executable
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#!/usr/bin/env python3
"""
Route preference: OSPF vs Static
This test configures a device with both an OSPF-acquired route on a
dedicated interface and a static route to the same destination on
another interface. The static route has a higher preference value than
OSPF.
Initially, the device should prefer the OSPF route; if the OSPF route
becomes unavailable, the static route should take over.
"""
import infamy
import infamy.route as route
from infamy.util import until, parallel
from infamy.netns import TPMR
def configure_interface(name, ip, prefix_length, forwarding=True):
return {
"name": name,
"enabled": True,
"ipv4": {
"forwarding": forwarding,
"address": [{"ip": ip, "prefix-length": prefix_length}]
}
}
def config_target1(target, data, link, ospf):
target.put_config_dicts({
"ietf-interfaces": {
"interfaces": {
"interface": [
configure_interface(data, "192.168.10.1", 24),
configure_interface(link, "192.168.50.1", 24),
configure_interface(ospf, "192.168.60.1", 24)
]
}
},
"ietf-routing": {
"routing": {
"control-plane-protocols": {
"control-plane-protocol": [
{
"type": "infix-routing:ospfv2",
"name": "ospf-default",
"ospf": {
"redistribute": {
"redistribute": [{"protocol": "connected"}]
},
"areas": {
"area": [{
"area-id": "0.0.0.0",
"interfaces": {
"interface": [{
"name": ospf,
"hello-interval": 1,
"dead-interval": 3
}]
}
}]
}
}
},
{
"type": "infix-routing:static",
"name": "dot20",
"static-routes": {
"ipv4": {
"route": [{
"destination-prefix": "192.168.20.0/24",
"next-hop": {"next-hop-address": "192.168.50.2"},
"route-preference": 120
}]
}
}
}
]
}
}
}
})
def config_target2(target, data, link, ospf):
target.put_config_dicts({
"ietf-interfaces": {
"interfaces": {
"interface": [
configure_interface(data, "192.168.20.2", 24),
configure_interface(link, "192.168.50.2", 24),
configure_interface(ospf, "192.168.60.2", 24)
]
}
},
"ietf-routing": {
"routing": {
"control-plane-protocols": {
"control-plane-protocol": [
{
"type": "infix-routing:ospfv2",
"name": "ospf-default",
"ospf": {
"redistribute": {
"redistribute": [{"protocol": "connected"}]
},
"areas": {
"area": [{
"area-id": "0.0.0.0",
"interfaces": {
"interface": [{
"name": ospf,
"hello-interval": 1,
"dead-interval": 3
}]
}
}]
}
}
},
{
"type": "infix-routing:static",
"name": "default",
"static-routes": {
"ipv4": {
"route": [{
"destination-prefix": "0.0.0.0/0",
"next-hop": {"next-hop-address": "192.168.50.1"}
}]
}
}
}
]
}
}
}
})
with infamy.Test() as test:
with test.step("Set up topology and attach to target DUTs"):
env = infamy.Env()
R1 = env.attach("R1", "mgmt")
R2 = env.attach("R2", "mgmt")
with test.step("Set up TPMR between R1ospf and R2ospf"):
ospf_breaker = TPMR(env.ltop.xlate("PC", "R1_ospf")[1], env.ltop.xlate("PC", "R2_ospf")[1]).start()
with test.step("Configure targets"):
_, R1data = env.ltop.xlate("R1", "data")
_, R1link = env.ltop.xlate("R1", "link")
_, R1ospf = env.ltop.xlate("R1", "ospf")
_, R2data = env.ltop.xlate("R2", "data")
_, R2link = env.ltop.xlate("R2", "link")
_, R2ospf = env.ltop.xlate("R2", "ospf")
parallel(config_target1(R1, R1data, R1link, R1ospf), config_target2(R2, R2data, R2link, R2ospf))
with test.step("Set up persistent MacVlan namespaces"):
_, hport_data1 = env.ltop.xlate("PC", "data1")
_, hport_data2 = env.ltop.xlate("PC", "data2")
ns1 = infamy.IsolatedMacVlan(hport_data1).start()
ns1.addip("192.168.10.11", prefix_length=24)
ns1.addroute("default", "192.168.10.1")
ns2 = infamy.IsolatedMacVlan(hport_data2).start()
ns2.addip("192.168.20.22", prefix_length=24)
ns2.addroute("default", "192.168.20.2")
with test.step("Wait for OSPF and static routes"):
print("Waiting for OSPF and static routes...")
until(lambda: route.ipv4_route_exist(R1, "192.168.20.0/24", proto="ietf-ospf:ospfv2"), attempts=200)
until(lambda: route.ipv4_route_exist(R1, "192.168.20.0/24", proto="ietf-routing:static"), attempts=200)
with test.step("Verify connectivity from PC:data1 to PC:data2 via OSPF"):
ns1.must_reach("192.168.20.22")
ospf_route_active = route.ipv4_route_exist(R1, "192.168.20.0/24", proto="ietf-ospf:ospfv2", active_check=True)
assert ospf_route_active, "OSPF route should be preferred when available."
hops = [row[1] for row in ns1.traceroute("192.168.20.22")]
assert "192.168.60.2" in hops, f"Path does not use expected OSPF route: {hops}"
with test.step("Simulate OSPF route loss by blocking OSPF interface"):
ospf_breaker.block()
until(lambda: not route.ipv4_route_exist(R1, "192.168.20.0/24", proto="ietf-ospf:ospfv2"), attempts=200)
with test.step("Verify connectivity via static route after OSPF failover"):
ns1.must_reach("192.168.20.22")
static_route_active = route.ipv4_route_exist(R1, "192.168.20.0/24", proto="ietf-routing:static", active_check=True)
assert static_route_active, "Static route should be preferred when OSPF route is unavailable."
hops = [row[1] for row in ns1.traceroute("192.168.20.22")]
assert "192.168.50.2" in hops, f"Path does not use expected static route: {hops}"
test.succeed()
test/case/ietf_routing/route_pref_ospf/topology.dot
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@@ -0,0 +1,41 @@
graph "route-preference" {
layout="neato";
overlap="false";
esep="+20";
size=10
node [shape=record, fontname="DejaVu Sans Mono, Book"];
edge [color="cornflowerblue", penwidth="2", fontname="DejaVu Serif, Book"];
PC
[
label="PC | { <mgmt1> mgmt1 | <data1> data1 | <> \n\n | <R1_ospf> R1_ospf | <R2_ospf> R2_ospf | <> \n\n | <data2> data2 | <mgmt2> mgmt2 }",
pos="20,50!",
kind="controller",
];
R1
[
label="{ <mgmt> mgmt | <data> data | <ospf> ospf | <link> link } | R1",
pos="70,58!",
kind="infix",
];
R2
[
label="{ <link> link | <ospf> ospf | <data> data | <mgmt> mgmt } | R2",
pos="70,42!",
kind="infix",
];
PC:mgmt1 -- R1:mgmt [kind=mgmt, color="lightgray"]
PC:mgmt2 -- R2:mgmt [kind=mgmt, color="lightgray"]
PC:data1 -- R1:data [color="black", headlabel="192.168.10.1/24", taillabel="192.168.10.11/24", fontcolor="black"]
PC:data2 -- R2:data [color="black", headlabel="192.168.20.2/24", taillabel="192.168.20.22/24", fontcolor="black"]
R1:link -- R2:link [headlabel="192.168.50.2/24", taillabel="192.168.50.1/24", labeldistance=1, fontcolor="black", color="black"]
R1:ospf -- PC:R1_ospf [color="lightgreen", taillabel="192.168.60.1/24"]
R2:ospf -- PC:R2_ospf [color="lightgreen", taillabel="192.168.60.2/24"]
}
test/case/ietf_routing/route_pref_ospf/topology.svg
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@@ -0,0 +1,103 @@
<?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: route&#45;preference Pages: 1 -->
<svg width="555pt" height="244pt"
viewBox="0.00 0.00 554.65 244.01" 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(4 240.01)">
<title>route&#45;preference</title>
<polygon fill="white" stroke="transparent" points="-4,4 -4,-240.01 550.65,-240.01 550.65,4 -4,4"/>
<!-- PC -->
<g id="node1" class="node">
<title>PC</title>
<polygon fill="none" stroke="black" points="0,-9.01 0,-227.01 107,-227.01 107,-9.01 0,-9.01"/>
<text text-anchor="middle" x="16.5" y="-114.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">PC</text>
<polyline fill="none" stroke="black" points="33,-9.01 33,-227.01 "/>
<text text-anchor="middle" x="70" y="-211.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt1</text>
<polyline fill="none" stroke="black" points="33,-204.01 107,-204.01 "/>
<text text-anchor="middle" x="70" y="-188.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">data1</text>
<polyline fill="none" stroke="black" points="33,-181.01 107,-181.01 "/>
<polyline fill="none" stroke="black" points="33,-141.01 107,-141.01 "/>
<text text-anchor="middle" x="70" y="-125.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">R1_ospf</text>
<polyline fill="none" stroke="black" points="33,-118.01 107,-118.01 "/>
<text text-anchor="middle" x="70" y="-102.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">R2_ospf</text>
<polyline fill="none" stroke="black" points="33,-95.01 107,-95.01 "/>
<polyline fill="none" stroke="black" points="33,-55.01 107,-55.01 "/>
<text text-anchor="middle" x="70" y="-39.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">data2</text>
<polyline fill="none" stroke="black" points="33,-32.01 107,-32.01 "/>
<text text-anchor="middle" x="70" y="-16.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt2</text>
</g>
<!-- R1 -->
<g id="node2" class="node">
<title>R1</title>
<polygon fill="none" stroke="black" points="458.92,-143.51 458.92,-235.51 541.92,-235.51 541.92,-143.51 458.92,-143.51"/>
<text text-anchor="middle" x="483.92" y="-220.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
<polyline fill="none" stroke="black" points="458.92,-212.51 508.92,-212.51 "/>
<text text-anchor="middle" x="483.92" y="-197.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
<polyline fill="none" stroke="black" points="458.92,-189.51 508.92,-189.51 "/>
<text text-anchor="middle" x="483.92" y="-174.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">ospf</text>
<polyline fill="none" stroke="black" points="458.92,-166.51 508.92,-166.51 "/>
<text text-anchor="middle" x="483.92" y="-151.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">link</text>
<polyline fill="none" stroke="black" points="508.92,-143.51 508.92,-235.51 "/>
<text text-anchor="middle" x="525.42" y="-185.81" font-family="DejaVu Sans Mono, Book" font-size="14.00">R1</text>
</g>
<!-- PC&#45;&#45;R1 -->
<g id="edge1" class="edge">
<title>PC:mgmt1&#45;&#45;R1:mgmt</title>
<path fill="none" stroke="lightgray" stroke-width="2" d="M107.5,-216.01C107.5,-216.01 458.42,-224.51 458.42,-224.51"/>
</g>
<!-- PC&#45;&#45;R1 -->
<g id="edge3" class="edge">
<title>PC:data1&#45;&#45;R1:data</title>
<path fill="none" stroke="black" stroke-width="2" d="M107.5,-193.01C107.5,-193.01 458.42,-201.51 458.42,-201.51"/>
<text text-anchor="middle" x="399.42" y="-205.31" font-family="DejaVu Serif, Book" font-size="14.00">192.168.10.1/24</text>
<text text-anchor="middle" x="171" y="-196.81" font-family="DejaVu Serif, Book" font-size="14.00">192.168.10.11/24</text>
</g>
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<g id="node3" class="node">
<title>R2</title>
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<polyline fill="none" stroke="black" points="458.92,-69.5 508.92,-69.5 "/>
<text text-anchor="middle" x="483.92" y="-54.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">ospf</text>
<polyline fill="none" stroke="black" points="458.92,-46.5 508.92,-46.5 "/>
<text text-anchor="middle" x="483.92" y="-31.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
<polyline fill="none" stroke="black" points="458.92,-23.5 508.92,-23.5 "/>
<text text-anchor="middle" x="483.92" y="-8.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
<polyline fill="none" stroke="black" points="508.92,-0.5 508.92,-92.5 "/>
<text text-anchor="middle" x="525.42" y="-42.8" font-family="DejaVu Sans Mono, Book" font-size="14.00">R2</text>
</g>
<!-- PC&#45;&#45;R2 -->
<g id="edge2" class="edge">
<title>PC:mgmt2&#45;&#45;R2:mgmt</title>
<path fill="none" stroke="lightgray" stroke-width="2" d="M107.5,-20.01C107.5,-20.01 458.42,-11.5 458.42,-11.5"/>
</g>
<!-- PC&#45;&#45;R2 -->
<g id="edge4" class="edge">
<title>PC:data2&#45;&#45;R2:data</title>
<path fill="none" stroke="black" stroke-width="2" d="M107.5,-43.01C107.5,-43.01 458.42,-34.5 458.42,-34.5"/>
<text text-anchor="middle" x="399.42" y="-38.3" font-family="DejaVu Serif, Book" font-size="14.00">192.168.20.2/24</text>
<text text-anchor="middle" x="171" y="-46.81" font-family="DejaVu Serif, Book" font-size="14.00">192.168.20.22/24</text>
</g>
<!-- R1&#45;&#45;PC -->
<g id="edge6" class="edge">
<title>R1:ospf&#45;&#45;PC:R1_ospf</title>
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<text text-anchor="middle" x="399.42" y="-181.31" font-family="DejaVu Serif, Book" font-size="14.00">192.168.60.1/24</text>
</g>
<!-- R1&#45;&#45;R2 -->
<g id="edge5" class="edge">
<title>R1:link&#45;&#45;R2:link</title>
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</g>
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<g id="edge7" class="edge">
<title>R2:ospf&#45;&#45;PC:R2_ospf</title>
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</g>
</g>
</svg>
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