diff --git a/ndn_utils/topologies/default-topology.conf b/ndn_utils/topologies/default-topology.conf
new file mode 100644
index 0000000..9452122
--- /dev/null
+++ b/ndn_utils/topologies/default-topology.conf
@@ -0,0 +1,9 @@
+[nodes]
+a: _
+b: _
+c: _
+d: _
+[links]
+a:b delay=10ms
+a:c delay=10ms
+b:d delay=10ms
diff --git a/ndn_utils/topologies/minindn.caida.conf b/ndn_utils/topologies/minindn.caida.conf
new file mode 100644
index 0000000..ab243e1
--- /dev/null
+++ b/ndn_utils/topologies/minindn.caida.conf
@@ -0,0 +1,36 @@
+[nodes]
+ucla: _ radius=16.586643 angle=2.999108
+pku: _ radius=11.149566 angle=2.870147
+csu: _ radius=14.105693 angle=2.992666
+caida: _ radius=17.603044 angle=2.943027
+arizona: _ radius=16.230539 angle=2.970333
+uiuc: _ radius=29.255355 angle=2.982312
+wustl: _ radius=19.426849 angle=4.310672
+umich: _ radius=17.773804 angle=2.980183
+neu: _ radius=19.900128 angle=2.138942
+memphis: _ radius=15.264774 angle=2.983607
+[links]
+ucla:csu delay=16ms
+ucla:pku delay=79ms
+ucla:memphis delay=39ms
+pku:csu delay=104ms
+pku:umich delay=110ms
+pku:neu delay=115ms
+pku:memphis delay=99ms
+pku:wustl delay=109ms
+pku:arizona delay=82ms
+pku:caida delay=78ms
+csu:uiuc delay=14ms
+csu:umich delay=15ms
+csu:wustl delay=19ms
+csu:memphis delay=21ms
+csu:neu delay=25ms
+csu:caida delay=18ms
+csu:arizona delay=18ms
+wustl:memphis delay=16ms
+uiuc:umich delay=6ms
+uiuc:memphis delay=10ms
+arizona:memphis delay=33ms
+memphis:neu delay=20ms
+memphis:umich delay=12ms
+memphis:caida delay=40ms
diff --git a/ndn_utils/topologies/minindn.testbed.conf b/ndn_utils/topologies/minindn.testbed.conf
new file mode 100644
index 0000000..0073f50
--- /dev/null
+++ b/ndn_utils/topologies/minindn.testbed.conf
@@ -0,0 +1,74 @@
+[nodes]
+unibas: _ radius=13.2717666496574 angle=2.41932700603969
+bupt: _ radius=11.5095245566676 angle=2.87230371009491
+pku: _ radius=11.1495655496376 angle=2.87014667817084
+tongji: _ radius=11.1495655496376 angle=2.8701500000
+orange: _ radius=10.9327229663161 angle=2.7739430543572
+arizona: _ radius=16.2305391313912 angle=2.97033285094067
+byu: _ radius=19.353845431776 angle=3.77334112452928
+csu: _ radius=14.1056931988398 angle=2.99266609145815
+uiuc: _ radius=29.2553552716 angle=2.98231233822261
+memphis: _ radius=15.2647735129845 angle=2.98360655737705
+neu: _ radius=19.9001283692128 angle=2.13894230769231
+uci: _ radius=19.2697694366069 angle=2.94186046511628
+ucla: _ radius=16.5866430024476 angle=2.99910767400357
+remap: _ radius=16.5866430024476 angle=2.9991100000
+umich: _ radius=17.7738038607456 angle=2.98018269081901
+wustl: _ radius=19.426848571939 angle=4.31067173953721
+urjc: _ radius=13.6888312671789 angle=1.17169974115617
+systemx: _ radius=19.1697680538273 angle=2.62274588691716
+lip6: _ radius=29.2553552716 angle=2.62295081967213
+waseda: _ radius=19.3583257471934 angle=2.99935233160622
+anyang: _ radius=14.3378634978013 angle=2.99956859361519
+caida: _ radius=17.6030443241278 angle=2.94302721088435
+[links]
+bupt:pku delay=14ms
+pku:unibas delay=127ms
+pku:tongji delay=14ms
+bupt:anyang delay=33ms
+bupt:tongji delay=18ms
+anyang:tongji delay=54ms
+bupt:waseda delay=48ms
+tongji:waseda delay=98ms
+tongji:caida delay=93ms
+caida:ucla delay=3ms
+anyang:pku delay=38ms
+anyang:waseda delay=22ms
+ucla:pku delay=85ms
+ucla:remap delay=1ms
+caida:uci delay=3ms
+uci:ucla delay=1ms
+uci:remap delay=1ms
+ucla:csu delay=16ms
+remap:csu delay=16ms
+caida:arizona delay=25ms
+waseda:arizona delay=75ms
+remap:arizona delay=25ms
+arizona:wustl delay=33ms
+wustl:uiuc delay=9ms
+csu:uiuc delay=14ms
+uiuc:umich delay=5ms
+csu:byu delay=8ms
+byu:remap delay=9ms
+byu:arizona delay=30ms
+wustl:urjc delay=86ms
+wustl:memphis delay=17ms
+arizona:memphis delay=17ms
+waseda:orange delay=144ms
+orange:systemx delay=2ms
+unibas:systemx delay=10ms
+memphis:neu delay=21ms
+pku:neu delay=112ms
+csu:umich delay=15ms
+urjc:lip6 delay=15ms
+urjc:unibas delay=9ms
+lip6:systemx delay=2ms
+unibas:lip6 delay=18ms
+memphis:umich delay=12ms
+memphis:orange delay=56ms
+urjc:orange delay=15ms
+lip6:orange delay=3ms
+lip6:umich delay=69ms
+unibas:orange delay=18ms
+umich:neu delay=14ms
+csu:arizona delay=18ms
diff --git a/ndn_utils/topologies/minindn.ucla.conf b/ndn_utils/topologies/minindn.ucla.conf
new file mode 100644
index 0000000..9135aeb
--- /dev/null
+++ b/ndn_utils/topologies/minindn.ucla.conf
@@ -0,0 +1,35 @@
+[nodes]
+ucla: _ radius=20.700007 angle=2.051234
+pku: _ radius=19.320956 angle=2.011893
+csu: _ radius=18.725071 angle=2.054556
+caida: _ radius=17.334066 angle=1.920136
+arizona: _ radius=21.038109 angle=5.203340
+uiuc: _ radius=21.247178 angle=2.038117
+wustl: _ radius=19.994570 angle=2.035105
+umich: _ radius=19.548038 angle=2.037021
+neu: _ radius=18.335813 angle=2.106513
+memphis: _ radius=17.389593 angle=1.925628
+[links]
+ucla:csu delay=16ms bw=1000
+ucla:umich delay=33ms bw=1000
+ucla:wustl delay=38ms bw=1000
+pku:csu delay=104ms bw=1000
+pku:caida delay=78ms bw=1000
+pku:wustl delay=109ms bw=1000
+pku:memphis delay=99ms bw=1000
+pku:umich delay=110ms bw=1000
+csu:caida delay=18ms bw=1000
+csu:wustl delay=19ms bw=1000
+csu:memphis delay=21ms bw=1000
+csu:uiuc delay=14ms bw=1000
+csu:umich delay=15ms bw=1000
+csu:neu delay=25ms bw=1000
+caida:neu delay=42ms bw=1000
+caida:arizona delay=25ms bw=1000
+caida:memphis delay=40ms bw=1000
+wustl:uiuc delay=9ms bw=1000
+wustl:umich delay=11ms bw=1000
+uiuc:umich delay=6ms bw=1000
+arizona:neu delay=35ms bw=1000
+arizona:memphis delay=33ms bw=1000
+memphis:neu delay=20ms bw=1000