[pox-dev] Mininet Script for Pox Router Example

[William Emmanuel Yu]

On Mon, 2012-10-01 at 10:36 -0700, Murphy McCauley wrote:
> What are the routing tables on h0 and h1 (e.g. route -n)?
> 
Kernel IP routing table on s0, s1
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
0.0.0.0         192.168.122.1   0.0.0.0         UG    100    0        0
eth0
192.168.1.0     0.0.0.0         255.255.255.192 U     0      0        0
s0-eth1
192.168.1.64    0.0.0.0         255.255.255.192 U     0      0        0
s1-eth1
192.168.1.128   0.0.0.0         255.255.255.192 U     0      0        0
s0-eth2
192.168.1.128   0.0.0.0         255.255.255.192 U     0      0        0
s1-eth2
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0
eth0

Kernel IP routing table on h0
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0
h0-eth0

Kernel IP routing table on h1
Destination     Gateway         Genmask         Flags Metric Ref    Use
Iface
0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0
h1-eth0

I think the routes create look correct (to not allow h0 to reach h1).
This is the output I get when I ping h1 from h0.

DEBUG:samples.of_sw_tutorial_resend:Broadcasting b6:af:f8:34:4b:b0.1 ->
ff:ff:ff:ff:ff:ff.65532
DEBUG:samples.of_sw_tutorial_resend:Broadcasting b6:af:f8:34:4b:b0.2 ->
ff:ff:ff:ff:ff:ff.65532
DEBUG:samples.of_sw_tutorial_resend:Installing b6:af:f8:34:4b:b0.2 ->
12:52:c1:7c:ec:e4.1 AND 12:52:c1:7c:ec:e4.1 -> b6:af:f8:34:4b:b0.2
DEBUG:samples.of_sw_tutorial_resend:Installing b6:af:f8:34:4b:b0.1 ->
12:52:c1:7c:ec:e4.2 AND 12:52:c1:7c:ec:e4.2 -> b6:af:f8:34:4b:b0.1

It seems that the proper flow entries are placed in both switches. But,
since h0 and h1 are not in the same subnet they shouldn't be able to see
each other at L3.

Thanks.

> On Oct 1, 2012, at 7:23 AM, William Emmanuel S. Yu wrote:
> 
> > L2 pairs yes so they are visible at Layer 2. However, they are in different subnets - 192.168.1.0/26 and 192.168.1.64/26. So they shouldn't be visible to each other at Layer 3.
> > ------Original Message------
> > From: pox-Murphy McCauley
> > To: aaa-William Yu
> > Cc: pox-dev at lists.noxrepo.org
> > Subject: Re: [pox-dev] Mininet Script for Pox Router Example
> > Sent: Oct 1, 2012 9:11 PM
> > 
> > On Oct 1, 2012, at 3:17 AM, William Emmanuel S. Yu wrote:
> > 
> >> By default, this does nothing. If I make s0 and s1 switches then h0 should ping s0, s0 should ping s1, and h1 should ping s1. But not h0 to ping h1. 
> > 
> > Though you're running an L2 pairs switch app, right?  That's going to let you ping between h0 and h1...
> > 
> > -- Murphy
> > 
> > "Sent on the move."
> 

-- 
-------------------------------------------------------
William Emmanuel S. Yu, Ph.D. (杨怀义)
Department of Information Systems and Computer Science
Ateneo de Manila University
email  :  wyu at ateneo dot edu
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