13 files changed, 549 insertions, 6 deletions
diff --git a/tools/conf-examples/dc-vpns.conf b/tools/conf-examples/dc-vpns.conf
new file mode 100644
index 0000000..8bfde51
--- /dev/null
+++ b/tools/conf-examples/dc-vpns.conf
@@ -0,0 +1,114 @@
+eth 110 100Mbps tor1 spine1
+eth 120 100Mbps tor1 spine2
+eth 11 25Mbps s11 tor1
+eth 12 25Mbps s12 tor1
+eth 13 25Mbps s13 tor1
+eth 14 25Mbps s14 tor1
+eth 15 25Mbps s15 tor1
+eth 16 25Mbps s16 tor1
+eth 17 25Mbps s17 tor1
+eth 18 25Mbps s18 tor1
+eth 210 100Mbps tor2 spine1
+eth 220 100Mbps tor2 spine2
+eth 21 25Mbps s21 tor2
+eth 22 25Mbps s22 tor2
+eth 23 25Mbps s23 tor2
+eth 24 25Mbps s24 tor2
+eth 25 25Mbps s25 tor2
+eth 26 25Mbps s26 tor2
+eth 27 25Mbps s27 tor2
+eth 28 25Mbps s28 tor2
+eth 310 100Mbps tor3 spine1
+eth 320 100Mbps tor3 spine2
+eth 31 25Mbps s31 tor3
+eth 32 25Mbps s32 tor3
+eth 33 25Mbps s33 tor3
+eth 34 25Mbps s34 tor3
+eth 35 25Mbps s35 tor3
+eth 36 25Mbps s36 tor3
+eth 37 25Mbps s37 tor3
+eth 38 25Mbps s38 tor3
+eth 410 100Mbps tor4 spine1
+eth 420 100Mbps tor4 spine2
+eth 41 25Mbps s41 tor4
+eth 42 25Mbps s42 tor4
+eth 43 25Mbps s43 tor4
+eth 44 25Mbps s44 tor4
+eth 45 25Mbps s45 tor4
+eth 46 25Mbps s46 tor4
+eth 47 25Mbps s47 tor4
+eth 48 25Mbps s48 tor4
+
+# DIF dcfabric  
+dif dcfabric tor1 110 120
+dif dcfabric tor2 210 220
+dif dcfabric tor3 310 320
+dif dcfabric tor4 410 420
+dif dcfabric spine1 110 210 310 410
+dif dcfabric spine2 120 220 320 420
+
+# DIF VPN1
+dif vpn1 s11 11
+dif vpn1 s12 12
+dif vpn1 s13 13
+dif vpn1 s14 14
+dif vpn1 tor1 11 12 13 14 dcfabric
+dif vpn1 s21 21
+dif vpn1 s22 22
+dif vpn1 s23 23
+dif vpn1 s24 24
+dif vpn1 tor2 21 22 23 24 dcfabric
+
+# DIF VPN2
+dif vpn2 s31 31
+dif vpn2 s32 32
+dif vpn2 s33 33
+dif vpn2 s34 34
+dif vpn2 tor3 31 32 33 34 dcfabric
+dif vpn2 s41 41
+dif vpn2 s42 42
+dif vpn2 s43 43
+dif vpn2 s44 44
+dif vpn2 tor4 41 42 43 44 dcfabric
+
+# DIF VPN3
+dif vpn3 s15 15
+dif vpn3 s16 16
+dif vpn3 s17 17
+dif vpn3 s18 18
+dif vpn3 tor1 15 16 17 18 dcfabric
+dif vpn3 s25 25
+dif vpn3 s26 26
+dif vpn3 s27 27
+dif vpn3 s28 28
+dif vpn3 tor2 25 26 27 28  dcfabric
+
+# DIF VPN4
+dif vpn4 s35 35
+dif vpn4 s36 36
+dif vpn4 s37 37
+dif vpn4 s38 38
+dif vpn4 tor3 35 36 37 38 dcfabric
+dif vpn4 s45 45
+dif vpn4 s46 46
+dif vpn4 s47 47
+dif vpn4 s48 48
+dif vpn4 tor4 45 46 47 48 dcfabric
+
+#Policies
+
+#Multipath FABRIC
+#policy dcfabric spine1,spine2 rmt.pff multipath
+#policy dcfabric spine1,spine2 routing link-state routingAlgorithm=ECMPDijkstra
+#policy dcfabric * rmt cas-ps q_max=1000
+#policy dcfabric * efcp.*.dtcp cas-ps
+
+#Application to DIF mappings
+#appmap vpn1 traffic.generator.server 1
+#appmap vpn1 rina.apps.echotime.server 1
+#appmap vpn2 traffic.generator.server 1
+#appmap vpn2 rina.apps.echotime.server 1
+#appmap vpn3 traffic.generator.server 1
+#appmap vpn3 rina.apps.echotime.server 1
+#appmap vpn4 traffic.generator.server 1
+#appmap vpn4 rina.apps.echotime.server 1
diff --git a/tools/conf-examples/geant2-renumber.conf b/tools/conf-examples/geant2-renumber.conf
new file mode 100644
index 0000000..07c014c
--- /dev/null
+++ b/tools/conf-examples/geant2-renumber.conf
@@ -0,0 +1,86 @@
+eth 2000 100Mbps lisbon madrid
+eth 2001 100Mbps lisbon london
+eth 2002 100Mbps london dublin
+eth 2003 100Mbps london paris
+eth 2004 100Mbps london brussels
+eth 2005 100Mbps paris madrid
+eth 2006 100Mbps paris luxemburg
+eth 2007 100Mbps paris bern
+eth 2008 100Mbps madrid bern
+eth 2009 100Mbps bern roma
+eth 2010 100Mbps roma madrid
+eth 2011 100Mbps brussels amsterdam
+eth 2012 100Mbps roma valleta
+eth 2013 100Mbps amsterdam valleta
+eth 2014 100Mbps bern berlin
+eth 2015 100Mbps luxemburg berlin
+eth 2016 100Mbps amsterdam berlin
+eth 2017 100Mbps amsterdam copenhagen
+eth 2018 100Mbps berlin copenhagen
+eth 2019 100Mbps copenhagen oslo
+eth 2020 100Mbps oslo stockholm
+eth 2021 100Mbps stockholm copenhagen
+eth 2023 100Mbps copenhagen tallin
+eth 2024 100Mbps tallin riga
+eth 2025 100Mbps riga vilnius
+eth 2026 100Mbps vilnius warsaw
+eth 2027 100Mbps warsaw berlin
+eth 2028 100Mbps warsaw praha
+eth 2029 100Mbps berlin praha
+eth 2030 100Mbps berlin viena
+eth 2031 100Mbps praha viena
+eth 2032 100Mbps viena budapest
+eth 2034 100Mbps viena ljubljana
+eth 2035 100Mbps ljubljana zagreb
+eth 2036 100Mbps zagreb budapest
+eth 2037 100Mbps budapest sofia
+eth 2038 100Mbps viena athens
+eth 2039 100Mbps sofia athens
+eth 2040 100Mbps athens roma
+eth 2041 100Mbps sofia bucharest
+eth 2042 100Mbps bucharest budapest
+eth 2043 100Mbps athens nicosia
+eth 2044 100Mbps roma nicosia
+eth 2045 100Mbps sofia ankara
+eth 2046 100Mbps bucharest ankara
+eth 2047 100Mbps berlin moscow
+eth 2048 100Mbps copenhagen moscow
+eth 2049 100Mbps roma viena
+
+# DIF renumber  
+dif renumber lisbon 2000 2001
+dif renumber madrid 2000 2005
+dif renumber london 2001 2002 2003 2004
+dif renumber dublin 2002
+dif renumber paris 2003 2005 2006 2007
+dif renumber brussels 2004 2011
+dif renumber luxemburg 2006 2015
+dif renumber bern 2007 2008 2009 2014
+dif renumber roma 2009 2010 2012 2040 2044 2049
+dif renumber amsterdam 2011 2013 2016 2017
+dif renumber valleta 2012 2013
+dif renumber berlin 2014 2015 2016 2018 2027 2029 2030 2047
+dif renumber copenhagen 2017 2018 2019 2021 2023 2048
+dif renumber oslo 2019 2020
+dif renumber stockholm 2020 2021
+dif renumber tallin 2023 2024
+dif renumber riga 2024 2025
+dif renumber vilnius 2025 2026
+dif renumber warsaw 2026 2027 2028
+dif renumber praha 2028 2029 2031
+dif renumber viena 2030 2031 2032 2034 2038
+dif renumber budapest 2032 2036 2037 2042
+dif renumber athens 2038 2039 2040 2043
+dif renumber ljubljana 2034 2035
+dif renumber zagreb 2035 2036
+dif renumber sofia 2037 2039 2041 2045
+dif renumber bucharest 2041 2042 2046
+dif renumber nicosia 2043 2044
+dif renumber ankara 2045 2046
+dif renumber moscow 2047 2048
+
+#Policies
+
+#address-change
+policy renumber * namespace-manager address-change useNewTimeout=20001 deprecateOldTimeout=80001 changePeriod=120001 addressRange=100
+policy renumber * routing link-state objectMaximumAge=10000 waitUntilReadCDAP=5001 waitUntilError=5001 waitUntilPDUFTComputation=103 waitUntilFSODBPropagation=101 waitUntilAgeIncrement=997 waitUntilDeprecateAddress=20001 routingAlgorithm=Dijkstra
diff --git a/tools/conf-examples/insane-stacking.conf b/tools/conf-examples/insane-stacking.conf
new file mode 100644
index 0000000..8032fea
--- /dev/null
+++ b/tools/conf-examples/insane-stacking.conf
@@ -0,0 +1,29 @@
+eth 300 0Mbps a b
+
+# DIF n1 lays over shim DIF 300
+dif n1 a 300
+dif n1 b 300
+
+# n2 lays over n1
+dif n2 a n1
+dif n2 b n1
+
+# n3 lays over n2
+dif n3 a n2
+dif n3 b n2
+
+# n4 lays over n3
+dif n4 a n3
+dif n4 b n3
+
+# n5 lays over n4
+dif n5 a n4
+dif n5 b n4
+
+# n6 lays over n5
+dif n6 a n5
+dif n6 b n5
+
+# n7 lays over n6
+dif n7 a n6
+dif n7 b n6
diff --git a/tools/conf-examples/isp-sec.conf b/tools/conf-examples/isp-sec.conf
new file mode 100644
index 0000000..33a35a6
--- /dev/null
+++ b/tools/conf-examples/isp-sec.conf
@@ -0,0 +1,189 @@
+eth 110 0Mbps cpe11 ar1
+eth 120 0Mbps cpe12 ar1
+eth 130 0Mbps cpe13 ar1
+eth 210 0Mbps cpe21 ar2
+eth 220 0Mbps cpe22 ar2
+eth 230 0Mbps cpe23 ar2
+eth 310 0Mbps cpe31 ar3
+eth 320 0Mbps cpe32 ar3
+eth 330 0Mbps cpe33 ar3
+eth 100 0Mbps ar1 manpe1
+eth 200 0Mbps ar2 manpe1
+eth 300 0Mbps ar3 manpe2
+eth 410 0Mbps manpe1 manpe2
+eth 411 0Mbps manpe1 manpe3
+eth 412 0Mbps manpe1 manpe4
+eth 420 0Mbps manpe2 manpe3
+eth 421 0Mbps manpe2 manpe4
+eth 430 0Mbps manpe3 manpe4
+eth 510 0Mbps manpe3 ser1
+eth 520 0Mbps manpe4 ser2
+eth 600 0Mbps ser1 core1
+eth 610 0Mbps ser1 core2
+eth 620 0Mbps ser2 core1
+eth 630 0Mbps ser2 core2
+eth 700 0Mbps core1 core2
+eth 710 0Mbps core1 core3
+eth 720 0Mbps core2 core4
+eth 730 0Mbps core3 core4
+eth 640 0Mbps core3 edge1
+eth 650 0Mbps core4 edge1
+eth 660 0Mbps core3 edge2
+eth 670 0Mbps core4 edge2
+eth 800 0Mbps edge1 isp2
+eth 810 0Mbps edge1 isp3
+eth 820 0Mbps edge2 isp4
+eth 830 0Mbps edge2 isp5
+
+# DIF core
+dif core ser1 600 610
+dif core ser2 620 630
+dif core core1 600 620 700 710
+dif core core2 610 630 700 720
+dif core core3 640 660 710 730 
+dif core core4 650 670 720 730
+dif core edge1 640 650
+dif core edge2 660 670
+
+# DIF access
+dif access ar1 100
+dif access ar2 200
+dif access ar3 300
+dif access manpe1 100 200 410 411 412
+dif access manpe2 300 410 420 421
+dif access manpe3 411 420 430 510
+dif access manpe4 412 421 430 520
+dif access ser1 510
+dif access ser2 520
+
+# DIF service
+dif service ar1 access
+dif service ar2 access
+dif service ar3 access
+dif service ser1 access core
+dif service ser2 access core
+dif service edge1 core
+dif service edge2 core
+
+# DIF emall1
+dif emall1 cpe11 110
+dif emall1 cpe12 120
+dif emall1 cpe21 210
+dif emall1 cpe22 220
+dif emall1 cpe31 310
+dif emall1 ar1 110 120 service
+dif emall1 ar2 210 220 service
+dif emall1 ar3 310 service
+dif emall1 edge1 service 800
+dif emall1 edge2 service 820
+dif emall1 isp2 800
+dif emall1 isp4 820
+
+# DIF emall2
+dif emall2 cpe13 130
+dif emall2 cpe23 230
+dif emall2 cpe32 320
+dif emall2 cpe33 330
+dif emall2 ar1 130 service
+dif emall2 ar2 230 service
+dif emall2 ar3 320 330 service
+dif emall2 edge1 service 810
+dif emall2 edge2 service 830
+dif emall2 isp3 810
+dif emall2 isp5 830
+
+#policies
+policy emall1 * security-manager.auth.default PSOC_authentication-ssh2 keyExchangeAlg=EDH keystore=/creds/ssh2 keystorePass=test
+policy emall1 * security-manager.encrypt.default default encryptAlg=AES128 macAlg=SHA256 compressAlg=deflate 
+policy emall1 ar1,ar2,ar3,edge1,edge2 security-manager.auth.service PSOC_authentication-none
+policy emall2 * security-manager.auth.default PSOC_authentication-ssh2 keyExchangeAlg=EDH keystore=/creds/ssh2 keystorePass=test
+policy emall2 * security-manager.encrypt.default default encryptAlg=AES128 macAlg=SHA256 compressAlg=deflate
+policy emall2 ar1,ar2,ar3,edge1,edge2 security-manager.auth.service PSOC_authentication-none
+
+#Enrollments
+enroll access ar1 manpe1 100
+enroll access ar2 manpe1 200
+enroll access ar3 manpe2 300
+enroll access ser1 manpe3 510
+enroll access ser2 manpe4 520
+enroll access manpe1 manpe2 410
+enroll access manpe1 manpe3 411
+enroll access manpe1 manpe4 412
+enroll access manpe2 manpe3 420
+enroll access manpe2 manpe4 421
+enroll access manpe3 manpe4 430
+
+enroll core core1 core2 700
+enroll core core1 core3 710
+enroll core core2 core4 720
+enroll core core3 core4 730
+enroll core ser1 core1 600
+enroll core ser1 core2 610
+enroll core ser2 core1 620
+enroll core ser2 core2 630
+enroll core edge1 core3 640
+enroll core edge1 core4 650
+enroll core edge2 core3 660
+enroll core edge2 core4 670
+
+enroll service edge1 edge2 core
+enroll service edge1 ser1 core
+enroll service edge1 ser2 core
+enroll service edge2 ser1 core
+enroll service edge2 ser2 core
+enroll service ser1 ser2 core
+enroll service ar1 ser1 access
+enroll service ar1 ser2 access
+enroll service ar2 ser1 access
+enroll service ar2 ser2 access
+enroll service ar3 ser1 access
+enroll service ar3 ser2 access
+
+enroll emall1 cpe11 ar1 110
+enroll emall1 cpe12 ar1 120
+enroll emall1 cpe21 ar2 210
+enroll emall1 cpe22 ar2 220
+enroll emall1 cpe31 ar3 310
+enroll emall1 ar1 edge1 service
+enroll emall1 ar1 edge2 service
+enroll emall1 ar2 edge1 service
+enroll emall1 ar2 edge2 service
+enroll emall1 ar3 edge1 service
+enroll emall1 ar3 edge2 service
+enroll emall1 edge1 edge2 service
+enroll emall1 isp2 edge1 800
+enroll emall1 isp4 edge2 820
+
+enroll emall2 cpe13 ar1 130
+enroll emall2 cpe23 ar2 230
+enroll emall2 cpe32 ar3 320
+enroll emall2 cpe33 ar3 330
+enroll emall2 ar1 edge1 service
+enroll emall2 ar1 edge2 service
+enroll emall2 ar2 edge1 service
+enroll emall2 ar2 edge2 service
+enroll emall2 ar3 edge1 service
+enroll emall2 ar3 edge2 service
+enroll emall2 edge1 edge2 service
+enroll emall2 isp3 edge1 810
+enroll emall2 isp5 edge2 830
+
+#Overlays
+overlay ar1 overlays/ispsec/ar1
+overlay ar2 overlays/ispsec/ar2
+overlay ar3 overlays/ispsec/ar3
+overlay cpe11 overlays/ispsec/cpe11
+overlay cpe12 overlays/ispsec/cpe12
+overlay cpe13 overlays/ispsec/cpe13
+overlay cpe21 overlays/ispsec/cpe21
+overlay cpe22 overlays/ispsec/cpe22
+overlay cpe23 overlays/ispsec/cpe23
+overlay cpe31 overlays/ispsec/cpe31
+overlay cpe32 overlays/ispsec/cpe32
+overlay cpe33 overlays/ispsec/cpe33
+overlay edge1 overlays/ispsec/edge1
+overlay edge2 overlays/ispsec/edge2
+overlay isp2 overlays/ispsec/isp2
+overlay isp3 overlays/ispsec/isp3
+overlay isp4 overlays/ispsec/isp4
+overlay isp5 overlays/ispsec/isp5
diff --git a/tools/conf-examples/resilient-square.conf b/tools/conf-examples/resilient-square.conf
new file mode 100644
index 0000000..592b6a5
--- /dev/null
+++ b/tools/conf-examples/resilient-square.conf
@@ -0,0 +1,16 @@
+# a, b and c and d are connected through p2p shim DIFs, in circle.
+# Between a and c there is an additional diagonal link.
+eth 300 100Mbps a b
+eth 400 100Mbps b c
+eth 500 100Mbps c d
+eth 600 1Mbps   d a
+eth 700 100Mbps a c
+
+# DIF n1 spans over the p2p shim DIFs
+dif n1 a 300 600 700
+dif n1 b 300 400
+dif n1 c 400 500 700
+dif n1 d 500 600
+
+# Use LFA policy as PDU Forwarding Function
+policy n1 * rmt.pff lfa
diff --git a/tools/conf-examples/secure-two-layers.conf b/tools/conf-examples/secure-two-layers.conf
new file mode 100644
index 0000000..54c1da6
--- /dev/null
+++ b/tools/conf-examples/secure-two-layers.conf
@@ -0,0 +1,25 @@
+eth 300 0Mbps a b
+eth 400 0Mbps b c
+eth 500 0Mbps c d
+
+# DIF n1 spans a,b and c and runs over the shims
+dif n1 a 300
+dif n1 b 300 400
+dif n1 c 400
+
+# DIF n2 spans c and d and runs over the shims
+dif n2 c 500
+dif n2 d 500
+
+# DIF n3 spans over n1 and n2
+dif n3 a n1
+dif n3 c n1 n2
+dif n3 d n2
+
+policy n3 * security-manager.auth.default PSOC_authentication-ssh2 keyExchangeAlg=EDH keystore=/creds keystorePass=test
+policy n3 * security-manager.encrypt.default default encryptAlg=AES128 macAlg=SHA256 compressAlg=deflate
+policy n3 * security-manager.ttl.default default initialValue=50
+policy n3 * security-manager.errorcheck.default CRC32
+policy n3 * security-manager.auth.n1 PSOC_authentication-password password=kf05j.a1234.af0k
+policy n3 * security-manager.ttl.n1 default initialValue=50
+policy n3 * security-manager.errorcheck.n1 CRC32
diff --git a/tools/conf-examples/seven.conf b/tools/conf-examples/seven.conf
new file mode 100644
index 0000000..b25f476
--- /dev/null
+++ b/tools/conf-examples/seven.conf
@@ -0,0 +1,34 @@
+# This configuration realizes the following seven-nodes topology
+#
+# MA ---- MB ---- MC --- MD --- ME
+#                 |             |
+#                 MF            MG
+#
+
+# 300 is a shim-eth-vlan DIF, with nodes a and b
+eth 300 0Mbps a b
+
+# 400 is a shim-eth-vlan DIF, with nodes b and c
+eth 400 0Mbps b c
+
+# 500 is a shim-eth-vlan DIF, with nodes c and f
+eth 500 0Mbps c f
+
+# 600 is a shim-eth-vlan DIF, with nodes c and d
+eth 600 0Mbps c d
+
+# 700 is a shim-eth-vlan DIF, with nodes d and e
+eth 700 0Mbps d e
+
+# 800 is a shim-eth-vlan DIF, with nodes e and g
+eth 800 0Mbps e g
+
+# DIF n1 spans over the two shim DIFs
+dif n1 a 300
+dif n1 b 300 400
+dif n1 c 400 500 600
+dif n1 d 600 700
+dif n1 e 700 800
+dif n1 f 500
+dif n1 g 800
+
diff --git a/tools/conf-examples/star.conf b/tools/conf-examples/star.conf
new file mode 100644
index 0000000..8a4f6ab
--- /dev/null
+++ b/tools/conf-examples/star.conf
@@ -0,0 +1,7 @@
+# a,b and c are in the same L2 domain
+eth 300 0Mbps a b c
+
+# DIF n1 spans over the shim DIF
+dif n1 a 300
+dif n1 b 300
+dif n1 c 300
diff --git a/tools/conf-examples/triangle.conf b/tools/conf-examples/triangle.conf
new file mode 100644
index 0000000..f89811c
--- /dev/null
+++ b/tools/conf-examples/triangle.conf
@@ -0,0 +1,9 @@
+# a, b and c are connected through p2p shim DIFs
+eth 300 10Mbps a b
+eth 400 20Mbps b c
+eth 500 30Mbps a c
+
+# DIF n1 spans over the p2p shim DIFs
+dif n1 a 300 500
+dif n1 b 300 400
+dif n1 c 400 500
diff --git a/tools/conf-examples/tutorial1.conf b/tools/conf-examples/tutorial1.conf
new file mode 100644
index 0000000..8023687
--- /dev/null
+++ b/tools/conf-examples/tutorial1.conf
@@ -0,0 +1,4 @@
+eth 100 0Mbps system1 system2
+
+dif Normal system1 100
+dif Normal system2 100
diff --git a/tools/conf-examples/tutorial2.conf b/tools/conf-examples/tutorial2.conf
new file mode 100644
index 0000000..b43fc17
--- /dev/null
+++ b/tools/conf-examples/tutorial2.conf
@@ -0,0 +1,6 @@
+eth 100 0Mbps system1 system2
+eth 101 0Mbps system2 system3
+
+dif Normal system1 100
+dif Normal system2 100 101
+dif Normal system3 101
diff --git a/tools/conf-examples/two-layers.conf b/tools/conf-examples/two-layers.conf
new file mode 100644
index 0000000..dc1bab2
--- /dev/null
+++ b/tools/conf-examples/two-layers.conf
@@ -0,0 +1,17 @@
+eth 300 0Mbps a b
+eth 400 0Mbps b c
+eth 500 0Mbps c d
+
+# DIF n1 spans a,b and c and runs over the shims
+dif n1 a 300
+dif n1 b 300 400
+dif n1 c 400
+
+# DIF n2 spans c and d and runs over the shims
+dif n2 c 500
+dif n2 d 500
+
+# DIF n3 spans over n1 and n2
+dif n3 a n1
+dif n3 c n1 n2
+dif n3 d n2
diff --git a/tools/democonf2rumba.py b/tools/democonf2rumba.py
index cda112c..c708e8e 100755
--- a/tools/democonf2rumba.py
+++ b/tools/democonf2rumba.py
@@ -90,8 +90,7 @@ def make_experiment(filename, experiment_class, experiment_kwargs,
                                       'dif_registrations': {},
                                       'registrations': {}})
                 nodes[vm]['difs'].append(dif)
-                nodes[vm]['dif_registrations'] \
-                         [dif] = dif_list
+                nodes[vm]['dif_registrations'][dif] = dif_list
                 # It is not defined yet, per check above.
 
                 continue
@@ -202,22 +201,30 @@ if __name__ == '__main__':
         import rumba.testbeds.emulab as emulab
         test_class = emulab.Testbed
         testbed_args = {a.dest: getattr(args, a.dest)
-                        for a in emulab_p._actions if a.dest != 'help'}
+                        for a in emulab_p._actions
+                        if a.dest != 'help'
+                        and getattr(args, a.dest) is not None}
     elif args.testbed == 'jfed':
         import rumba.testbeds.jfed as jfed
         test_class = jfed.Testbed
         testbed_args = {a.dest: getattr(args, a.dest)
-                        for a in jfed_p._actions if a.dest != 'help'}
+                        for a in jfed_p._actions
+                        if a.dest != 'help'
+                        and getattr(args, a.dest) is not None}
     elif args.testbed == 'qemu':
         import rumba.testbeds.qemu as qemu
         test_class = qemu.Testbed
         testbed_args = {a.dest: getattr(args, a.dest)
-                        for a in qemu_p._actions if a.dest != 'help'}
+                        for a in qemu_p._actions
+                        if a.dest != 'help'
+                        and getattr(args, a.dest) is not None}
     elif args.testbed == 'fake':
         import rumba.testbeds.faketestbed as fake
         test_class = fake.Testbed
         testbed_args = {a.dest: getattr(args, a.dest)
-                        for a in fake_p._actions if a.dest != 'help'}
+                        for a in fake_p._actions
+                        if a.dest != 'help'
+                        and getattr(args, a.dest) is not None}
     else:
         if args.testbed is None:
             print('Testbed type must be specified!')