Routing table entries do not match Request Rspec

[Divyashri Bhat]

Hi,

I am using the attached RSpec to reserve resources.

The topology consists of 3 nodes with a single link between each pair of nodes. Each of these links is in a different subnet. All the IPs are in the 192.168.a.xx subnet with the subnet Mask as 255.255.255.0. 

However, when I log in to node A, my routing table entry looks like:

root@nodea:/users/dbhat# route -n

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

0.0.0.0         172.16.0.1      0.0.0.0         UG    0      0        0 eth0

172.16.0.0      0.0.0.0         255.240.0.0     U     0      0        0 eth0

192.168.0.0     192.168.3.12    255.255.0.0     UG    0      0        0 eth2

192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth1

192.168.2.8     192.168.1.11    255.255.255.252 UG    0      0        0 eth1

192.168.3.0     0.0.0.0         255.255.255.0   U     0      0        0 eth2

I am not sure why these entries are a part of the routing table:

192.168.0.0     192.168.3.12    255.255.0.0     UG    0      0        0 eth2

192.168.2.8     192.168.1.11    255.255.255.252 UG    0      0        0 eth1

Is there a problem with the RSpec? 

Currently, I have a slice "testlearn" reserved at the Nysernet IG rack with this RSpec.

Could you please help me with this?

Thank you,

--
Regards,

Divyashri Bhat

Graduate Student

University of Massachusetts, Amherst

E-mail: divyash...@gmail.comr

[Leigh Stoller]

> The topology consists of 3 nodes with a single link between each pair of nodes. Each of these links is in a different subnet. All the IPs are in the 192.168.a.xx subnet with the subnet Mask as 255.255.255.0.

Hi. Best not to use 192.168 subnets on your links. 192.168 is
used for the control plane network. Use the 10. or 172. spaces.

Leigh

[Divyashri Bhat]

Hi Leigh, 

Thank you for looking into this.

I now have addresses in the 10.10 space and I see similar entries as before in the routing table

root@nodea:/users/dbhat# route -n

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

0.0.0.0         172.16.0.1      0.0.0.0         UG    0      0        0 eth0

10.0.0.0        10.10.3.12      255.0.0.0       UG    0      0        0 eth2

10.10.1.0       0.0.0.0         255.255.255.0   U     0      0        0 eth1

10.10.2.8       10.10.1.11      255.255.255.252 UG    0      0        0 eth1

10.10.3.0       0.0.0.0         255.255.255.0   U     0      0        0 eth2

172.16.0.0      0.0.0.0         255.240.0.0     U     0      0        0 eth0

This particular entry is not mentioned in the RSpec (attached here):

10.0.0.0        10.10.3.12      255.0.0.0       UG    0      0        0 eth2

10.10.2.8       10.10.1.11      255.255.255.252 UG    0      0        0 eth1

Is there any way to delete or avoid these entries?

Thank you,

Leigh





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[Nicholas Bastin]

On Tue, Apr 29, 2014 at 1:22 PM, Divyashri Bhat <divyash...@gmail.com> wrote:

This particular entry is not mentioned in the RSpec (attached here):

10.0.0.0        10.10.3.12      255.0.0.0       UG    0      0        0 eth2

10.10.2.8       10.10.1.11      255.255.255.252 UG    0      0        0 eth1

Is there any way to delete or avoid these entries?

Are you sure your postboot scripts aren't causing these entries to be added?

--

Nick 

[Leigh Stoller]

> This particular entry is not mentioned in the RSpec (attached here):
> 10.0.0.0 10.10.3.12 255.0.0.0 UG 0 0 0 eth2
> 10.10.2.8 10.10.1.11 255.255.255.252 UG 0 0 0 eth1

Hi. Is this slice currently running someplace?

Leigh

[Divyashri Bhat]

Thanks Nick and Leigh.

I am not changing or setting the IP address within the postboot script. 

The slice name is "testlearn" at the Nysernet IG Rack.

Thank you very much for looking into this.

Leigh

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[Leigh Stoller]

> I am not changing or setting the IP address within the postboot script.

So, is the routing correct or incorrect? :-)

The short answer is that the route generator that constructs the
static routes, has “optimized" them in an unusual, but correct way.

If you want finer grained control over the routes, you might have
to add that to your boot scripts (deleting the existing routes
and adding your own).

Leigh

[Divyashri Bhat]

Hi Leigh,

Thank you once again :)

We will definitely want to delete these routes as they are interfering with the routes that we try to set later:

10.0.0.0        10.10.3.12      255.0.0.0       UG    0      0        0 eth2

10.10.2.8       10.10.1.11      255.255.255.252 UG    0      0        0 eth1

I will add that into the postboot script.

Thanks,

Leigh






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[mon...@sbsstc.ac.in]

Hllo sir,
I want to connect my nodes to router through switch in jack,In jack we can reserve our nodes but there is no facility to reserver router and switch.Could u plz help me to let me know that how should i reserve router and switch to connect to my nodes to create my topology???