#!/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