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Re: [Testbed-admins] [geni-dev] Virtual Nodes IPs

Well this has been a problem for us since a long time. The way we have our network setup, we end up having the gateway interface for the private net on our router that is visible to the campus network. The campus network uses the 172.16.x.x for our wireless and dorm pc, causing a routing problem for emulab. So For that reason any person using the campus wireless network and computers from dorms cannot access the Emulab webinterface.
We had put in a temporary fix by performing a NAT translation for incoming connection to Emulab from our our campus 172.16.x.x addresses, but we keep running our of addresses to allocate after translation. We needed to fix this and the best solution for us was to use a different IP address range for virtual nodes in Emulab that does not conflict with our Campus 172.16.x.x . It has become all the more important for us now since OpenVZ in protogeni is going to use the same address space .. 

cheers,

Hussam
(Hussamuddin Nasir)

Netlab Operations Team

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Laboratory for Adv. Networking  Phone  : (859)218-0059
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301 Rose Street, Rm 202         E-mail : nasir@netlab.uky.edu
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                        University of Kentucky
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On 12/17/2009 08:56 AM, Leigh Stoller wrote:

Hi guys,
   I tried a grep for 172.16 on the src tree i got from CVS

and it looks like freebsd Jail setup in tmcd  has these line (line
78-80) in testbed/tmcd/freebsd/jail/mkjail.pl

# XXX
my $JAILCNET       = "172.16.0.0";
my $JAILCNETMASK   = "255.240.0.0";

Does this mean that the 172.16 addresses are still hardcoded for
FBSD-JAILS ?


Kinda looks that way. How necessary is it that you change the IP space
for jails?

Lbs