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Merge pull request #16 from opensourcerouting/bgp-topo1
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BGP ECMP Topology (2nd)
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@mwinter-osr
mwinter-osr authored Jul 26, 2017
2 parents 6706925 + 91520bd commit b07381e
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Empty file added bgp-ecmp-topo1/__init__.py
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206 changes: 206 additions & 0 deletions bgp-ecmp-topo1/bgp-ecmp-topo1.dot
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## Color coding:
#########################
## Main FRR: #f08080 red
## Switches: #d0e0d0 gray
## RIP: #19e3d9 Cyan
## RIPng: #fcb314 dark yellow
## OSPFv2: #32b835 Green
## OSPFv3: #19e3d9 Cyan
## ISIS IPv4 #fcb314 dark yellow
## ISIS IPv6 #9a81ec purple
## BGP IPv4 #eee3d3 beige
## BGP IPv6 #fdff00 yellow
##### Colors (see http://www.color-hex.com/)

graph ospf_ecmp_iBGP_topo1 {
label="bgp ecmp topo1 - eBGP with different AS numbers";
labelloc="t";

# Routers
r1 [
label="r1\nrtr-id 10.0.255.1/32",
shape=doubleoctagon,
fillcolor="#f08080",
style=filled,
];

# 4 Switches for eBGP Peers
s1 [
label="s1\n10.0.1.0/24",
shape=oval,
fillcolor="#d0e0d0",
style=filled,
];
s2 [
label="s2\n10.0.2.0/24",
shape=oval,
fillcolor="#d0e0d0",
style=filled,
];
s3 [
label="s3\n10.0.3.0/24",
shape=oval,
fillcolor="#d0e0d0",
style=filled,
];
s4 [
label="s4\n10.0.4.0/24",
shape=oval,
fillcolor="#d0e0d0",
style=filled,
];

# 20 ExaBGP Peers AS 101...120
peer1 [
label="eBGP peer1\nAS99\nrtr-id 10.0.1.101/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer2 [
label="eBGP peer2\nAS99\nrtr-id 10.0.1.102/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer3 [
label="eBGP peer3\nAS99\nrtr-id 10.0.1.103/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer4 [
label="eBGP peer4\nAS99\nrtr-id 10.0.1.104/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer5 [
label="eBGP peer5\nAS99\nrtr-id 10.0.1.105/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer6 [
label="eBGP peer6\nAS99\nrtr-id 10.0.2.106/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer7 [
label="eBGP peer7\nAS99\nrtr-id 10.0.2.107/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer8 [
label="eBGP peer8\nAS99\nrtr-id 10.0.2.108/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer9 [
label="eBGP peer9\nAS99\nrtr-id 10.0.2.109/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer10 [
label="eBGP peer10\nAS99\nrtr-id 10.0.2.110/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer11 [
label="eBGP peer11\nAS111\nrtr-id 10.0.3.111/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer12 [
label="eBGP peer12\nAS112\nrtr-id 10.0.3.112/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer13 [
label="eBGP peer13\nAS113\nrtr-id 10.0.3.113/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer14 [
label="eBGP peer14\nAS114\nrtr-id 10.0.3.114/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer15 [
label="eBGP peer15\nAS115\nrtr-id 10.0.3.115/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer16 [
label="eBGP peer16\nAS116\nrtr-id 10.0.4.116/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer17 [
label="eBGP peer17\nAS117\nrtr-id 10.0.4.117/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer18 [
label="eBGP peer18\nAS118\nrtr-id 10.0.4.118/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer19 [
label="eBGP peer19\nAS119\nrtr-id 10.0.4.119/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];
peer20 [
label="eBGP peer20\nAS120\nrtr-id 10.0.4.120/32",
shape=rectangle,
fillcolor="#eee3d3",
style=filled,
];

# Connections
r1 -- s1 [label="eth0\n.1"];
r1 -- s2 [label="eth1\n.1"];
r1 -- s3 [label="eth2\n.1"];
r1 -- s4 [label="eth3\n.1"];

peer1 -- s1 [label="eth0\n.101"];
peer2 -- s1 [label="eth0\n.102"];
peer3 -- s1 [label="eth0\n.103"];
peer4 -- s1 [label="eth0\n.104"];
peer5 -- s1 [label="eth0\n.105"];
peer6 -- s2 [label="eth0\n.106"];
peer7 -- s2 [label="eth0\n.107"];
peer8 -- s2 [label="eth0\n.108"];
peer9 -- s2 [label="eth0\n.109"];
peer10 -- s2 [label="eth0\n.110"];
peer11 -- s3 [label="eth0\n.111"];
peer12 -- s3 [label="eth0\n.112"];
peer13 -- s3 [label="eth0\n.113"];
peer14 -- s3 [label="eth0\n.114"];
peer15 -- s3 [label="eth0\n.115"];
peer16 -- s4 [label="eth0\n.116"];
peer17 -- s4 [label="eth0\n.117"];
peer18 -- s4 [label="eth0\n.118"];
peer19 -- s4 [label="eth0\n.119"];
peer20 -- s4 [label="eth0\n.120"];

# Arrange network to make cleaner diagram
{ rank=same peer1 peer2 peer3 peer4 peer5 } -- s1 -- { rank=same peer6 peer7 peer8 peer9 peer10 } -- s2
-- { rank=same peer11 peer12 peer13 peer14 peer15 } -- s3 -- { rank=same peer16 peer17 peer18 peer19 peer20 } -- s4
-- { rank=same r1 } [style=invis]
}
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54 changes: 54 additions & 0 deletions bgp-ecmp-topo1/exabgp.env
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[exabgp.api]
encoder = text
highres = false
respawn = false
socket = ''

[exabgp.bgp]
openwait = 60

[exabgp.cache]
attributes = true
nexthops = true

[exabgp.daemon]
daemonize = true
pid = '/var/run/exabgp/exabgp.pid'
user = 'exabgp'
##daemonize = false

[exabgp.log]
all = false
configuration = true
daemon = true
destination = '/var/log/exabgp.log'
enable = true
level = INFO
message = false
network = true
packets = false
parser = false
processes = true
reactor = true
rib = false
routes = false
short = false
timers = false

[exabgp.pdb]
enable = false

[exabgp.profile]
enable = false
file = ''

[exabgp.reactor]
speed = 1.0

[exabgp.tcp]
acl = false
bind = ''
delay = 0
once = false
port = 179
38 changes: 38 additions & 0 deletions bgp-ecmp-topo1/peer1/exa-receive.py
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#!/usr/bin/env python

"""
exa-receive.py: Save received routes form ExaBGP into file
"""

from sys import stdin,argv
from datetime import datetime

# 1st arg is peer number
peer = int(argv[1])

# When the parent dies we are seeing continual newlines, so we only access so many before stopping
counter = 0

routesavefile = open('/tmp/peer%s-received.log' % peer, 'w')

while True:
try:
line = stdin.readline()
timestamp = datetime.now().strftime('%Y%m%d_%H:%M:%S - ')
routesavefile.write(timestamp + line)
routesavefile.flush()

if line == "":
counter += 1
if counter > 100:
break
continue

counter = 0
except KeyboardInterrupt:
pass
except IOError:
# most likely a signal during readline
pass

routesavefile.close()
49 changes: 49 additions & 0 deletions bgp-ecmp-topo1/peer1/exa-send.py
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#!/usr/bin/env python

"""
exa-send.py: Send a few testroutes with ExaBGP
"""

from sys import stdout,argv
from time import sleep

sleep(5)

# 1st arg is peer number
# 2nd arg is number of routes to send
peer = int(argv[1])
numRoutes = int(argv[2])
if (peer <= 10):
asnum = 99
else:
asnum = peer+100

# Announce numRoutes equal routes per PE - different neighbor AS
for i in range(0, numRoutes):
stdout.write('announce route 10.201.%s.0/24 med 100 next-hop 10.0.%i.%i origin igp\n' % (i, (((peer-1) / 5) + 1), peer+100))
stdout.flush()

# Announce numRoutes equal routes per PE - different neighbor AS, but same source AS
for i in range(0, numRoutes):
stdout.write('announce route 10.202.%s.0/24 med 100 next-hop 10.0.%i.%i origin igp as-path [ %i 200 ]\n' % (i, (((peer-1) / 5) + 1), peer+100, asnum))
stdout.flush()

# Announce numRoutes equal routes with different med per PE and different neighbor AS
for i in range(0, numRoutes):
stdout.write('announce route 10.203.%s.0/24 med %i next-hop 10.0.%i.%i origin igp\n' % (i, peer, (((peer-1) / 5) + 1), peer+100))
stdout.flush()

# Announce numRoutes equal routes with different med per PE and different neighbor AS, but same source AS
for i in range(0, numRoutes):
stdout.write('announce route 10.204.%s.0/24 med %i next-hop 10.0.%i.%i origin igp as-path [ %i 200 ]\n' % (i, peer, (((peer-1) / 5) + 1), peer+100, asnum))
stdout.flush()

# Announce 2 different route per peer
stdout.write('announce route 10.205.%i.0/24 next-hop 10.0.%i.%i origin igp\n' % (peer, (((peer-1) / 5) + 1), peer+100))
stdout.write('announce route 10.206.%i.0/24 next-hop 10.0.%i.%i origin igp as-path [ %i 200 ]\n' % (peer, (((peer-1) / 5) + 1), peer+100, asnum))
stdout.flush()

#Loop endlessly to allow ExaBGP to continue running
while True:
sleep(1)

21 changes: 21 additions & 0 deletions bgp-ecmp-topo1/peer1/exabgp.cfg
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group controller {

process announce-routes {
run "/etc/exabgp/exa-send.py 1 10";
}

process receive-routes {
run "/etc/exabgp/exa-receive.py 1";
receive-routes;
encoder text;
}

neighbor 10.0.1.1 {
router-id 10.0.1.101;
local-address 10.0.1.101;
local-as 99;
peer-as 100;
graceful-restart;
}

}
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