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#!/usr/bin/env python
# SPDX-License-Identifier: ISC
#
# Part of NetDEF Topology Tests
#
# Copyright (c) 2017 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
r"""
customize.py: Simple FRR MPLS L3VPN test topology
|
+----+----+
| ce1 |
| 99.0.0.1| CE Router
+----+----+
192.168.1. | .2 ce1-eth0
| .1 r1-eth4
+---------+
| r1 |
| 1.1.1.1 | PE Router
+----+----+
| .1 r1-eth0
|
~~~~~~~~~~~~~
~~ sw0 ~~
~~ 10.0.1.0/24 ~~
~~~~~~~~~~~~~
|10.0.1.0/24
|
| .2 r2-eth0
+----+----+
| r2 |
| 2.2.2.2 | P router
+--+---+--+
r2-eth2 .2 | | .2 r2-eth1
______/ \______
/ \
~~~~~~~~~~~~~ ~~~~~~~~~~~~~
~~ sw2 ~~ ~~ sw1 ~~
~~ 10.0.3.0/24 ~~ ~~ 10.0.2.0/24 ~~
~~~~~~~~~~~~~ ~~~~~~~~~~~~~
| / |
\ _________/ |
\ / \
r3-eth1 .3 | | .3 r3-eth0 | .4 r4-eth0
+----+--+---+ +----+----+
| r3 | | r4 | r4-eth5
| 3.3.3.3 | | 4.4.4.4 |-------+ PE Routers
+-----------+ +---------+ |
192.168.1.1 |r3.eth4 192.168.1.1 | r4-eth4 |192.168.2.1
.2 | ceX-eth0 .2 | | .2
+-----+-----+ +----+-----+ +----+-----+
| ce2 | | ce3 | | ce4 |
| 99.0.0.2 | | 99.0.0.3 | | 99.0.0.4 | CE Routers
+-----+-----+ +----+-----+ +----+-----+
| | |
"""
import os
import platform
# pylint: disable=C0413
# Import topogen and topotest helpers
from lib import topotest
from lib.topogen import get_topogen
from lib.topolog import logger
from lib.ltemplate import ltemplateRtrCmd
# Required to instantiate the topology builder class.
CWD = os.path.dirname(os.path.realpath(__file__))
# test name based on directory
TEST = os.path.basename(CWD)
def build_topo(tgen):
"Build function"
# This function only purpose is to define allocation and relationship
# between routers, switches and hosts.
#
# Create P/PE routers
# check for mpls
tgen.add_router("r1")
if tgen.hasmpls != True:
logger.info("MPLS not available, tests will be skipped")
return
mach = platform.machine()
krel = platform.release()
if mach[:1] == "a" and topotest.version_cmp(krel, "4.11") < 0:
logger.info("Need Kernel version 4.11 to run on arm processor")
return
for routern in range(2, 5):
tgen.add_router("r{}".format(routern))
# Create CE routers
for routern in range(1, 5):
tgen.add_router("ce{}".format(routern))
# CE/PE links
tgen.add_link(tgen.gears["ce1"], tgen.gears["r1"], "ce1-eth0", "r1-eth4")
tgen.add_link(tgen.gears["ce2"], tgen.gears["r3"], "ce2-eth0", "r3-eth4")
tgen.add_link(tgen.gears["ce3"], tgen.gears["r4"], "ce3-eth0", "r4-eth4")
tgen.add_link(tgen.gears["ce4"], tgen.gears["r4"], "ce4-eth0", "r4-eth5")
# Create a switch with just one router connected to it to simulate a
# empty network.
switch = {}
switch[0] = tgen.add_switch("sw0")
switch[0].add_link(tgen.gears["r1"], nodeif="r1-eth0")
switch[0].add_link(tgen.gears["r2"], nodeif="r2-eth0")
switch[1] = tgen.add_switch("sw1")
switch[1].add_link(tgen.gears["r2"], nodeif="r2-eth1")
switch[1].add_link(tgen.gears["r3"], nodeif="r3-eth0")
switch[1].add_link(tgen.gears["r4"], nodeif="r4-eth0")
switch[1] = tgen.add_switch("sw2")
switch[1].add_link(tgen.gears["r2"], nodeif="r2-eth2")
switch[1].add_link(tgen.gears["r3"], nodeif="r3-eth1")
def ltemplatePreRouterStartHook():
cc = ltemplateRtrCmd()
krel = platform.release()
tgen = get_topogen()
logger.info("pre router-start hook, kernel=" + krel)
# check for mpls
if tgen.hasmpls != True:
logger.info("MPLS not available, skipping setup")
return False
# trace errors/unexpected output
cc.resetCounts()
# configure r2 mpls interfaces
intfs = ["lo", "r2-eth0", "r2-eth1", "r2-eth2"]
for intf in intfs:
cc.doCmd(tgen, "r2", "echo 1 > /proc/sys/net/mpls/conf/{}/input".format(intf))
# configure cust1 VRFs & MPLS
rtrs = ["r1", "r3", "r4"]
cmds = [
"ip link add {0}-cust1 type vrf table 10",
"ip ru add oif {0}-cust1 table 10",
"ip ru add iif {0}-cust1 table 10",
"ip link set dev {0}-cust1 up",
]
for rtr in rtrs:
for cmd in cmds:
cc.doCmd(tgen, rtr, cmd.format(rtr))
cc.doCmd(tgen, rtr, "ip link set dev {0}-eth4 master {0}-cust1".format(rtr))
intfs = [rtr + "-cust1", "lo", rtr + "-eth0", rtr + "-eth4"]
for intf in intfs:
cc.doCmd(
tgen, rtr, "echo 1 > /proc/sys/net/mpls/conf/{}/input".format(intf)
)
logger.info(
"setup {0} vrf {0}-cust1, {0}-eth4. enabled mpls input.".format(rtr)
)
# configure cust4 VRFs & MPLS
cmds = [
"ip link add {0}-cust4 type vrf table 30",
"ip link set dev {0}-cust4 up",
"ip link add {0}-cust5 type vrf table 40",
"ip link set dev {0}-cust5 up",
]
rtr = "r1"
for cmd in cmds:
cc.doCmd(tgen, rtr, cmd.format(rtr))
logger.info("setup {0} vrf {0}-cust3 and{0}-cust4.".format(rtr))
# configure cust2 VRFs & MPLS
rtrs = ["r4"]
cmds = [
"ip link add {0}-cust2 type vrf table 20",
"ip ru add oif {0}-cust2 table 20",
"ip ru add iif {0}-cust2 table 20",
"ip link set dev {0}-cust2 up",
]
for rtr in rtrs:
for cmd in cmds:
cc.doCmd(tgen, rtr, cmd.format(rtr))
cc.doCmd(tgen, rtr, "ip link set dev {0}-eth5 master {0}-cust2".format(rtr))
intfs = [rtr + "-cust2", rtr + "-eth5"]
for intf in intfs:
cc.doCmd(
tgen, rtr, "echo 1 > /proc/sys/net/mpls/conf/{}/input".format(intf)
)
logger.info(
"setup {0} vrf {0}-cust2, {0}-eth5. enabled mpls input.".format(rtr)
)
# put ce4-eth0 into a VRF (no default instance!)
rtrs = ["ce4"]
cmds = [
"ip link add {0}-cust2 type vrf table 20",
"ip ru add oif {0}-cust2 table 20",
"ip ru add iif {0}-cust2 table 20",
"ip link set dev {0}-cust2 up",
]
for rtr in rtrs:
for cmd in cmds:
cc.doCmd(tgen, rtr, cmd.format(rtr))
cc.doCmd(tgen, rtr, "ip link set dev {0}-eth0 master {0}-cust2".format(rtr))
if cc.getOutput() != 0:
InitSuccess = False
logger.info(
"Unexpected output seen ({} times, tests will be skipped".format(
cc.getOutput()
)
)
else:
rtrs = ["r1", "r3", "r4", "ce4"]
for rtr in rtrs:
logger.info("{} configured".format(rtr))
cc.doCmd(tgen, rtr, "ip -d link show type vrf")
cc.doCmd(tgen, rtr, "ip link show")
InitSuccess = True
logger.info("VRF config successful!")
return InitSuccess
def ltemplatePostRouterStartHook():
logger.info("post router-start hook")
return True
|
