Changes between Version 33 and Version 34 of GENIEducation/SampleAssignments/TcpAssignment/ExerciseLayout/DesignSetup


Ignore:
Timestamp:
05/17/13 11:21:19 (11 years ago)
Author:
shuang@bbn.com
Comment:

--

Legend:

Unmodified
Added
Removed
Modified

  • GENIEducation/SampleAssignments/TcpAssignment/ExerciseLayout/DesignSetup

    v33 v34  
    313313    - disk_image. For InstaGENI, the user does not need to specify a disk_image, it automatically chooses a default one (a version of Fedora Core). For ExoGENI, the user have to specify one. Again, we have a handful of choices, see [https://wiki.exogeni.net/doku.php?id=public:experimenters:images this link].
    314314    - interface. Since ExoGENI provides KVM VMs, the user needs to manually define the IP address of each interface on each ExoGENI nodes.
     315    - boot up execution scripts. When nodes are up in ExoGENI, the interfaces are not yet configured. ExoGENI relies on a `neuca` service to configure those interfaces. Unfortunately, this `neuca` service will over-write any network configurations once in a while. So the best way right now is to stop `neuca` service when the interfaces are up and running. The execution scripts help to detect whether interfaces are up then stops neuca service. Interested users can download the scripts and take a look.
    315316    - xml header.
    316317
    … …  
    373374INFO:omni:Using control framework portal
    374375INFO:omni:Substituting AM nickname eg-gpo with URL https://bbn-hn.exogeni.net:11443/orca/xmlrpc, URN unspecified_AM_URN
    375 INFO:omni:Slice urn:publicid:IDN+panther:ShufengProject+slice+shufengTCP expires within 1 day on 2013-05-16 00:00:00 UTC
     376INFO:omni:Slice urn:publicid:IDN+panther:ShufengProject+slice+shufengTCP expires on 2013-05-21 00:00:00 UTC
    376377INFO:omni:Substituting AM nickname eg-gpo with URL https://bbn-hn.exogeni.net:11443/orca/xmlrpc, URN unspecified_AM_URN
    377378INFO:omni:Substituting AM nickname eg-gpo with URL https://bbn-hn.exogeni.net:11443/orca/xmlrpc, URN unspecified_AM_URN
    … …  
    387388INFO:omni: 
    388389<rspec type="manifest" xsi:schemaLocation="http://www.geni.net/resources/rspec/3 http://www.geni.net/resources/rspec/3/manifest.xsd http://hpn.east.isi.edu/rspec/ext/stitch/0.1/ http://hpn.east.isi.edu/rspec/ext/stitch/0.1/stitch-schema.xsd http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/slice-info/1 http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/slice-info/1/slice_info.xsd?format=raw http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/sliver-info/1 http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/sliver-info/1/sliver_info.xsd?format=raw" xmlns:ns2="http://hpn.east.isi.edu/rspec/ext/stitch/0.1/" xmlns="http://www.geni.net/resources/rspec/3" xmlns:ns4="http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/sliver-info/1" xmlns:ns3="http://groups.geni.net/exogeni/attachment/wiki/RspecExtensions/slice-info/1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    389     <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#left" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="left">
     390    <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#right" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="right">
    390391        <sliver_type name="m1.small">
    391392            <disk_image version="0beb69c8fbe65af0134ac8fe38b22e8f9b3c254c" name="http://emmy9.casa.umass.edu/Disk_Images/ExoGENI/Ubuntu1204/ubuntu1204.xml"/>
    392393        </sliver_type>
    393         <services/>
    394         <interface client_id="left:if0">
    395             <ip type="ipv4" netmask="255.255.255.0" address="172.16.2.2"/>
     394        <services>
     395            <execute command="#!/bin/bash
     396# Automatically generated boot script
     397
     398# wget or curl must be installed on the image
     399cd /tmp
     400if [ -x `which wget 2&amp;gt;/dev/null` ]; then
     401  wget -q http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz
     402else if [ -x `which curl 2&amp;gt;/dev/null` ]; then
     403  curl http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz &amp;gt; `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     404fi
     405fi
     406# untar
     407tar -zxf `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     408execString=&amp;quot;/bin/bash -c \&amp;quot;/tmp/changeRoute.sh 10.10.2.1\&amp;quot;&amp;quot;
     409eval $execString
     410
     411"/>
     412        </services>
     413        <interface client_id="right:if0">
     414            <ip type="ipv4" netmask="255.255.255.0" address="10.10.2.2"/>
    396415        </interface>
    397         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     416        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    398417    </node>
    399     <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#top" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="top">
     418    <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#top" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="top">
    400419        <sliver_type name="m1.small">
    401420            <disk_image version="0beb69c8fbe65af0134ac8fe38b22e8f9b3c254c" name="http://emmy9.casa.umass.edu/Disk_Images/ExoGENI/Ubuntu1204/ubuntu1204.xml"/>
    402421        </sliver_type>
    403         <services/>
     422        <services>
     423            <execute command="#!/bin/bash
     424# Automatically generated boot script
     425
     426# wget or curl must be installed on the image
     427cd /tmp
     428if [ -x `which wget 2&amp;gt;/dev/null` ]; then
     429  wget -q http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz
     430else if [ -x `which curl 2&amp;gt;/dev/null` ]; then
     431  curl http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz &amp;gt; `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     432fi
     433fi
     434# untar
     435tar -zxf `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     436execString=&amp;quot;/bin/bash -c \&amp;quot;/tmp/changeRoute.sh 10.10.3.1\&amp;quot;&amp;quot;
     437eval $execString
     438
     439"/>
     440        </services>
    404441        <interface client_id="top:if0">
    405             <ip type="ipv4" netmask="255.255.255.0" address="172.16.4.2"/>
     442            <ip type="ipv4" netmask="255.255.255.0" address="10.10.3.2"/>
    406443        </interface>
    407         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     444        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    408445    </node>
    409     <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#right" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="right">
     446    <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#bottom" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="bottom">
    410447        <sliver_type name="m1.small">
    411448            <disk_image version="0beb69c8fbe65af0134ac8fe38b22e8f9b3c254c" name="http://emmy9.casa.umass.edu/Disk_Images/ExoGENI/Ubuntu1204/ubuntu1204.xml"/>
    412449        </sliver_type>
    413         <services/>
    414         <interface client_id="right:if0">
    415             <ip type="ipv4" netmask="255.255.255.0" address="172.16.3.2"/>
     450        <services>
     451            <execute command="#!/bin/bash
     452# Automatically generated boot script
     453
     454# wget or curl must be installed on the image
     455cd /tmp
     456if [ -x `which wget 2&amp;gt;/dev/null` ]; then
     457  wget -q http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz
     458else if [ -x `which curl 2&amp;gt;/dev/null` ]; then
     459  curl http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz &amp;gt; `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     460fi
     461fi
     462# untar
     463tar -zxf `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     464execString=&amp;quot;/bin/bash -c \&amp;quot;/tmp/changeRoute.sh 10.10.4.1\&amp;quot;&amp;quot;
     465eval $execString
     466
     467"/>
     468        </services>
     469        <interface client_id="bottom:if0">
     470            <ip type="ipv4" netmask="255.255.255.0" address="10.10.4.2"/>
    416471        </interface>
    417         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     472        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    418473    </node>
    419     <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#center" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="center">
     474    <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#center" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="center">
    420475        <sliver_type name="m1.small">
    421476            <disk_image version="0beb69c8fbe65af0134ac8fe38b22e8f9b3c254c" name="http://emmy9.casa.umass.edu/Disk_Images/ExoGENI/Ubuntu1204/ubuntu1204.xml"/>
    422477        </sliver_type>
    423         <services/>
     478        <services>
     479            <execute command="#!/bin/bash
     480# Automatically generated boot script
     481
     482# wget or curl must be installed on the image
     483cd /tmp
     484if [ -x `which wget 2&amp;gt;/dev/null` ]; then
     485  wget -q http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/enableIPFwd.tar.gz
     486else if [ -x `which curl 2&amp;gt;/dev/null` ]; then
     487  curl http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/enableIPFwd.tar.gz &amp;gt; `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/enableIPFwd.tar.gz`
     488fi
     489fi
     490# untar
     491tar -zxf `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/enableIPFwd.tar.gz`
     492execString=&amp;quot;/bin/bash -c \&amp;quot;/tmp/enableIPFwd.sh\&amp;quot;&amp;quot;
     493eval $execString
     494
     495"/>
     496        </services>
     497        <interface client_id="center:if0">
     498            <ip type="ipv4" netmask="255.255.255.0" address="10.10.1.1"/>
     499        </interface>
    424500        <interface client_id="center:if2">
    425             <ip type="ipv4" netmask="255.255.255.0" address="172.16.4.1"/>
     501            <ip type="ipv4" netmask="255.255.255.0" address="10.10.3.1"/>
     502        </interface>
     503        <interface client_id="center:if1">
     504            <ip type="ipv4" netmask="255.255.255.0" address="10.10.2.1"/>
    426505        </interface>
    427506        <interface client_id="center:if3">
    428             <ip type="ipv4" netmask="255.255.255.0" address="172.16.5.1"/>
     507            <ip type="ipv4" netmask="255.255.255.0" address="10.10.4.1"/>
    429508        </interface>
    430         <interface client_id="center:if1">
    431             <ip type="ipv4" netmask="255.255.255.0" address="172.16.3.1"/>
    432         </interface>
    433         <interface client_id="center:if0">
    434             <ip type="ipv4" netmask="255.255.255.0" address="172.16.2.1"/>
    435         </interface>
    436         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     509        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    437510    </node>
    438     <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#bottom" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="bottom">
     511    <node sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#left" exclusive="false" component_name="orca-vm-cloud" component_manager_id="urn:publicid:IDN+exogeni.net:bbnvmsite+authority+am" component_id="urn:publicid:IDN+exogeni.net:bbnvmsite+node+orca-vm-cloud" client_id="left">
    439512        <sliver_type name="m1.small">
    440513            <disk_image version="0beb69c8fbe65af0134ac8fe38b22e8f9b3c254c" name="http://emmy9.casa.umass.edu/Disk_Images/ExoGENI/Ubuntu1204/ubuntu1204.xml"/>
    441514        </sliver_type>
    442         <services/>
    443         <interface client_id="bottom:if0">
    444             <ip type="ipv4" netmask="255.255.255.0" address="172.16.5.2"/>
     515        <services>
     516            <execute command="#!/bin/bash
     517# Automatically generated boot script
     518
     519# wget or curl must be installed on the image
     520cd /tmp
     521if [ -x `which wget 2&amp;gt;/dev/null` ]; then
     522  wget -q http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz
     523else if [ -x `which curl 2&amp;gt;/dev/null` ]; then
     524  curl http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz &amp;gt; `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     525fi
     526fi
     527# untar
     528tar -zxf `basename http://www.gpolab.bbn.com/experiment-support/TCPExampleExperiment/changeRoute.tar.gz`
     529execString=&amp;quot;/bin/bash -c \&amp;quot;/tmp/changeRoute.sh 10.10.1.1\&amp;quot;&amp;quot;
     530eval $execString
     531
     532"/>
     533        </services>
     534        <interface client_id="left:if0">
     535            <ip type="ipv4" netmask="255.255.255.0" address="10.10.1.2"/>
    445536        </interface>
    446         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     537        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    447538    </node>
    448     <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#topLink" client_id="topLink">
    449         <interface_ref client_id="top:if0"/>
    450         <interface_ref client_id="center:if2"/>
    451         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     539    <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#leftLink" client_id="leftLink">
     540        <interface_ref client_id="left:if0"/>
     541        <interface_ref client_id="center:if0"/>
     542        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    452543    </link>
    453     <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#leftLink" client_id="leftLink">
    454         <interface_ref client_id="center:if0"/>
    455         <interface_ref client_id="left:if0"/>
    456         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    457     </link>
    458     <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#rightLink" client_id="rightLink">
     544    <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#rightLink" client_id="rightLink">
    459545        <interface_ref client_id="center:if1"/>
    460546        <interface_ref client_id="right:if0"/>
    461         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     547        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    462548    </link>
    463     <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+5893fa3e-4a8a-42ce-ac4a-7e2f77ef310a#bottomLink" client_id="bottomLink">
     549    <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#bottomLink" client_id="bottomLink">
    464550        <interface_ref client_id="center:if3"/>
    465551        <interface_ref client_id="bottom:if0"/>
    466         <ns4:geni_sliver_info state="Nascent" start_time="2013-05-15T14:11:08.252Z" expiration_time="2013-05-16T14:11:08.252Z" creation_time="2013-05-15T14:11:08.252Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     552        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
    467553    </link>
    468     <ns3:geni_slice_info state="configuring" uuid="ae708f85-3fb9-49ef-9b79-7631a9ceea8f" urn="urn:publicid:IDN+panther:ShufengProject+slice+shufengTCP"/>
     554    <link vlantag="unknown" sliver_id="urn:publicid:IDN+exogeni.net:bbnvmsite+sliver+03a3f20d-9111-4ed0-97ba-c6551c3a86d4#topLink" client_id="topLink">
     555        <interface_ref client_id="center:if2"/>
     556        <interface_ref client_id="top:if0"/>
     557        <ns4:geni_sliver_info state="Ticketed" start_time="2013-05-17T15:01:59.611Z" expiration_time="2013-05-18T15:01:59.611Z" creation_time="2013-05-17T15:01:59.611Z" creator_urn="shufeng.huang@uky.edu, urn:publicid:IDN+panther+user+shufeng"/>
     558    </link>
     559    <ns3:geni_slice_info state="configuring" uuid="8a4460fe-6bba-4c97-a514-fe4395d07891" urn="urn:publicid:IDN+panther:ShufengProject+slice+shufengTCP"/>
    469560</rspec>
    470561
    … …  
    590681 As a result, this error might happen a lot, especially if you have done experiments on ExoGENI before (since it always uses the same IP range for its VMs and each VM is different from each other, i.e., with different RSA keys). [[BR]]
    591682 In this case, simply open ''~/.ssh/known_hosts'' and remove the line corresponding to the IP address you are trying to login. In our case here, find ''192.1.242.65'' and remove that line. [[BR]]
    592 
    593 '''Enable IP forwarding and configure routing tables'''
     683 '''Note that the nodes are ready to login does not mean the interfaces are up and well configured. Users may need to wait for up to 5 minutes after nodes are up. '''
     684 
     685'''Enable IP forwarding and configure routing tables -- you can omit this step since the rspec has already done it for you :-)'''
    594686 This is a very important step in terms of using ExoGENI. [[BR]]
    595687 Since ExoGENI does not automatically configure IP address/routing table/IP forwarding for the user (unlike protoGENI and InstaGENI), the user needs to do it manually. [[BR]]