Re: [dpdk-dev] Guest Machine is not Pingable from Host Machine

[Arkajit Ghosh <arkajit.ghosh@tcs.com>]

Hi, 

I have executed below commands:

./utilities/ovs-vsctl add-br ovsbr0
./utilities/ovs-vsctl set bridge datapath_type=netdev
./utilities/ovs-vsctl add-port ovsbr0 dpdk0 -- set Interface dpdk0 type=dpdk
./utilities/ovs-vsctl add-port ovsbr0 dpdk1 -- set Interface dpdk1 type=dpdk
./utilities/ovs-vsctl show

Please find the attachement for bridge and dpdk-port creation..

Now, If i do "ifconfig -a" the created bridge ovsbr0 is showing Broadcast Running and Multicast but ip address was not given. So i had assign an IP-address to ovsbr0 which previously Eth1 had. 

So, now I try to ping this guest machine ip address from its host.  Here is the output. 

ping 192.168.1.7
PING 192.168.1.7 (192.168.1.7) 56(84) bytes of data.
>From 192.168.1.40 icmp_seq=1 Destination Host Unreachable
>From 192.168.1.40 icmp_seq=5 Destination Host Unreachable
>From 192.168.1.40 icmp_seq=6 Destination Host Unreachable
>From 192.168.1.40 icmp_seq=7 Destination Host Unreachable
>From 192.168.1.40 icmp_seq=8 Destination Host Unreachable
>From 192.168.1.40 icmp_seq=9 Destination Host Unreachable

I believe it should be pinged from its host machine. Can please let  me know what is the issue and how to proceed.

Thanks & Regards
Arkajit Ghosh
____________________________________________

-----Ngo Doan Lap <lapngodoan@gmail.com> wrote: -----
To: Arkajit Ghosh <arkajit.ghosh@tcs.com>
From: Ngo Doan Lap <lapngodoan@gmail.com>
Date: 03/06/2015 08:52PM
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] Guest Machine is not Pingable from Host Machine

Hi,
Can you show the log output of OVS? and the ouput of following command
cd path/to/ovs/utilities/
 ./ovs-ofctl show br0
 ./ovs-ofctl dump-flows br0
(Assum that br0 is a bridge name that you had created)

On Fri, Mar 6, 2015 at 10:14 PM, Arkajit Ghosh <arkajit.ghosh@tcs.com> wrote:
Hi,
 
 Can anyone please suggest how to proceed.
 
 
 Thanks & Regards
 Arkajit Ghosh
 
 -----Arkajit Ghosh/DEL/TCS wrote: -----
 To: dev@dpdk.org
 From: Arkajit Ghosh/DEL/TCS
 Date: 03/04/2015 12:39PM
 Subject: Guest Machine is not Pingable from Host Machine
 
 Hi Team,
 
 Guest machine is not pingable from Host machine after creating a bridge with datapath_type "netdev" in the configuration database and adding  dpdk ports. Can anyone please let me know what is the issue.
 
 Thanks in advance.
 
 Thanks & Regards
 Arkajit Ghosh
 
 
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-- 
Thanks and Best Regards,
Ngo Doan Lap
Mobile: 0977.833.757          
From michael.qiu@intel.com  Mon Mar  9 06:21:27 2015
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From: "Qiu, Michael" <michael.qiu@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Thread-Topic: [dpdk-dev] [PATCH 1/3 v2] librte_hash: Fix unsupported
 instruction `crc32' in i686 platform
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Subject: Re: [dpdk-dev] [PATCH 1/3 v2] librte_hash: Fix unsupported
 instruction `crc32' in i686 platform
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On 3/8/2015 2:39 AM, Thomas Monjalon wrote:
> 2015-03-06 01:39, Qiu, Michael:
>> On 3/6/2015 1:11 AM, Thomas Monjalon wrote:
>>> 2015-03-06 00:55, Michael Qiu:
>>>> CC rte_hash.o
>>>> Error: unsupported instruction `crc32'
>>>>
>>>> The root cause is that i686 platform does not support 'crc32q'
>>>> Need make it only available in x86_64 platform
>>>>
>>>> Signed-off-by: Michael Qiu <michael.qiu@intel.com>
>>>> ---
>>>> v2 --> v1:
>>>>          Make crc32 instruction only works in X86 platform
>>>>  lib/librte_hash/rte_hash_crc.h | 12 ++++++++++++
>>>>  1 file changed, 12 insertions(+)
>>>>
>>>> diff --git a/lib/librte_hash/rte_hash_crc.h b/lib/librte_hash/rte_hash_crc.h
>>>> index d28bb2a..c0a789e 100644
>>>> --- a/lib/librte_hash/rte_hash_crc.h
>>>> +++ b/lib/librte_hash/rte_hash_crc.h
>>>> @@ -364,6 +364,7 @@ crc32c_2words(uint64_t data, uint32_t init_val)
>>>>  	return crc;
>>>>  }
>>>>  
>>>> +#if defined RTE_ARCH_I686 || defined RTE_ARCH_X86_64
>>>>  static inline uint32_t
>>>>  crc32c_sse42_u32(uint32_t data, uint32_t init_val)
>>>>  {
>>>> @@ -373,7 +374,9 @@ crc32c_sse42_u32(uint32_t data, uint32_t init_val)
>>>>  			: [data] "rm" (data));
>>>>  	return init_val;
>>>>  }
>>>> +#endif
>>> Wouldn't it be more elegant to define a stub which returns 0 in #else
>>> in order to remove #ifdef below?
>>> Not sure, matter of taste.
>> It may be not a good idea, see rte_hash_crc_8byte(), if no crc32
>> support, it will use crc32c_2words(), if we define a stub which returns
>> 0 in #else, then we need always check the return value whether it is
>> none-zero otherwise need fallback.
> I don't think so.
> The stub won't never been called because they are protected by the cpuflag
> condition.

Hi, Thomas

You are right, I will send out v3 patch to fix this

Thanks,
Michael

>