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#!/usr/bin/env python
#
# Part of NetDEF Topology Tests
#
# Copyright (c) 2017 by
# Network Device Education Foundation, Inc. ("NetDEF")
#
# Permission to use, copy, modify, and/or distribute this software
# for any purpose with or without fee is hereby granted, provided
# that the above copyright notice and this permission notice appear
# in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NETDEF DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NETDEF BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
# DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
# WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
# ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
# OF THIS SOFTWARE.
#
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 |
| 3.3.3.3 | | 4.4.4.4 | PE Routers
+-----------+ +---------+
192.168.1. | .1 192.168.1. | .1 rX-eth4
| .2 | .2 ceX-eth0
+-----+-----+ +----+-----+
| ce2 | | ce3 |
| 99.0.0.2 | | 99.0.0.3 | CE Routers
+-----+-----+ +----+-----+
| |
"""
import os
# pylint: disable=C0413
# Import topogen and topotest helpers
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
tgen.add_router("r1")
# check for mpls
if tgen.hasmpls != True:
logger.info("MPLS not available, tests will be skipped")
return
for routern in range(2, 5):
tgen.add_router("r{}".format(routern))
# Create CE routers
for routern in range(1, 4):
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")
# 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()
tgen = get_topogen()
logger.info("pre router-start hook")
# check for mpls
if tgen.hasmpls != True:
logger.info("MPLS not available, skipping setup")
return False
logger.info("setup mpls input")
return True
def ltemplatePostRouterStartHook():
logger.info("post router-start hook")
return True
|
