Open Stack

Hi. Sorry for delayed replay.

Now precreated VM image is available for easy evaluation.
It is announced on ryu-devel at lists.sourceforge.net,
I site it for sure. I hope you can get successful result.

> From: FUJITA Tomonori <fujita.tomonori at ...>
> Subject: pre-configured VM image file for OpenStack environment with Ryu
>
> Hi,
> 
> We created a VM image file that enables you to easily set up
> multi-node Nova environment with Ryu in your desktop machine:
> 
> https://github.com/osrg/ryu/wiki/RYU-OpenStack-environment-VM-image-file-HOWTO
> 
> Enjoy!

On Sun, May 13, 2012 at 07:42:14PM -0500, Salman Malik wrote:
> Hi Dan and Others,
> 
> I am trying to understand the actions taken by Ryu when the new instance sends
> DHCP discover message to dnsmasq. When I launch new instannce it keeps on
> sending discover messages and controller keeps on dropping these messages. But
> looking at the traffic I couldn't exactly map which MAC address belonged to
> which entity. Can someone help me with my understanding of the MAC addresses.
> Using ifconfig , "ovs-ofctl show br-int" and "ovs-ofctl snoop br-int" (output
> shown after MAC addresses), I know exactly about some MAC addresses and can't
> figure out some of them:
> 
> Interfaces              |        HWAddress          |        IP-addr
> ---------------------------------------------------------------------------------------------
> eth0                        |        08:00:27:7a:ff:65    |    10.0.3.15
> eth1                        |        08:00:27:16:d5:09  |   
> 10.0.0.10             <========plugged into br-int
> gw-82bd3a73-dc    |        fa:16:3e:49:57:1b  |    10.0.0.1               <====
> ====plugged into br-int (this is the --listen-address of my two dnsmasqs)
> br-int                       |        08:00:27:16:d5:09 |               
>                 <========why doesn't bridge have no IP ?
> new-instance          |        02:d8:47:48:35:26  <====== MAC address of newly
> launched instance? (see output below)
> 
> Unkown                 |        fa:16:3e:5e:02:17   <======Seemingly unknown
> MAC address(which is related to the new instance?)
> Unkown                  |        33:33:00:00:00:16   <====== MAC address
> related to multicast ?
> 
> 
> Questions:
> 
> 1. What is gw-82bd3a73-dc interface ?
> 2. I am kind of unsure why br-int is so useful?
> 3. Why doesn't br-int don't have any IP address?
> 4. Why do we need to plugin a compute node's interface to br-int? (so that
> guest instances on remote host can communicate with each other?)
> 5. What is the relationship b/w 02:d8:47:48:35:26 and fa:16:3e:5e:02:17 MAC
> addresses in the following output?
> 
> =====================
> Output of : ovs-ofctl snoop br-int
> =====================
> OFPT_ECHO_REQUEST (xid=0x0): 0 bytes of payload
> OFPT_ECHO_REPLY (xid=0x0): 0 bytes of payload
> OFPT_PORT_STATUS (xid=0x0): ADD: 7(tap76127847-b1): addr:02:d8:47:48:35:26
>      config:     0
>      state:      LINK_DOWN
>      current:    10MB-FD COPPER
> OFPT_FLOW_MOD (xid=0x491662da): DEL priority=0 buf:0x0 actions=drop
> OFPT_BARRIER_REQUEST (xid=0x491662db):
> OFPT_BARRIER_REPLY (xid=0x491662db):
> OFPT_PORT_STATUS (xid=0x0): MOD: 7(tap76127847-b1): addr:02:d8:47:48:35:26
>      config:     0
>      state:      0
>      current:    10MB-FD COPPER
> OFPT_ECHO_REQUEST (xid=0x0): 0 bytes of payload
> OFPT_ECHO_REPLY (xid=0x0): 0 bytes of payload
> OFPT_PACKET_IN (xid=0x0): total_len=90 in_port=7 data_len=90 buffer=0x00000167
> tunnel0:in_port0007:tci(0) macfa:16:3e:5e:02:17->33:33:00:00:00:16 type86dd
> proto58 tos0 ipv6::->ff02::16 port143->0
> fa:16:3e:5e:02:17 > 33:33:00:00:00:16, ethertype IPv6 (0x86dd), length 90: :: >
> ff02::16: HBH ICMP6, multicast listener report v2, 1 group record(s), length 28
> OFPT_PACKET_OUT (xid=0x491662dc): in_port=7 actions_len=0 actions=drop buffer=
> 0x00000167
> OFPT_PACKET_IN (xid=0x0): total_len=322 in_port=7 data_len=128 buffer=
> 0x00000168
> tunnel0:in_port0007:tci(0) macfa:16:3e:5e:02:17->ff:ff:ff:ff:ff:ff type0800
> proto17 tos0 ip0.0.0.0->255.255.255.255 port68->67
> fa:16:3e:5e:02:17 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 128:
> truncated-ip - 194 bytes missing! 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
> Request from fa:16:3e:5e:02:17, length 280
> OFPT_PACKET_OUT (xid=0x491662dd): in_port=7 actions_len=0 actions=drop buffer=
> 0x00000168
> OFPT_PACKET_IN (xid=0x0): total_len=78 in_port=7 data_len=78 buffer=0x00000169
> fa:16:3e:5e:02:17 > ff:ff:ff:ff:ff:ff, ethertype IPv4 (0x0800), length 128:
> truncated-ip - 194 bytes missing! 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP,
> Request from fa:16:3e:5e:02:17, length 280
> OFPT_PACKET_OUT (xid=0x491662e3): in_port=7 actions_len=0 actions=drop buffer=
> 0x0000016e
> OFPT_PACKET_IN (xid=0x0): total_len=70 in_port=7 data_len=70 buffer=0x0000016f
> tunnel0:in_port0007:tci(0) macfa:16:3e:5e:02:17->33:33:00:00:00:02 type86dd
> proto58 tos0 ipv6fe80::f816:3eff:fe5e:217->ff02::2 port133->0
> fa:16:3e:5e:02:17 > 33:33:00:00:00:02, ethertype IPv6 (0x86dd), length 70:
> fe80::f816:3eff:fe5e:217 > ff02::2: ICMP6, router solicitation, length 16
> OFPT_PORT_STATUS (xid=0x0): MOD: 7(tap76127847-b1): addr:02:d8:47:48:35:26
>      config:     0
>      state:      LINK_DOWN
>      current:    10MB-FD COPPER
> OFPT_PORT_STATUS (xid=0x0): DEL: 7(tap76127847-b1): addr:02:d8:47:48:35:26
>      config:     0
>      state:      LINK_DOWN
>      current:    10MB-FD COPPER
> OFPT_FLOW_MOD (xid=0x491662e5): DEL priority=0,in_port=7 actions=drop
> OFPT_FLOW_MOD (xid=0x491662e6): DEL priority=0 actions=drop
> OFPT_BARRIER_REQUEST (xid=0x491662e7):
> OFPT_BARRIER_REPLY (xid=0x491662e7):
> 
> Thanks!
> Salman

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