[Xen-users] Fw: domU network problem , 10/30 progress

[Hao Yu <yuh@xxxxxxxxxx>]

Hao Yu

Commercial Scale Out
IBM T.J. Watson Research Center
1101 Kitchawan Rd/Route 134, Rm 36-019
Yorktown Heights, NY 10598-0218
914-945-1854, Email: yuh@xxxxxxxxxx
----- Forwarded by Hao Yu/Watson/IBM on 10/31/2006 09:52 AM -----
                                                                           
             Jimi                                                          
             Xenidis/Watson/IB                                             
             M                                                          To 
                                       Hao Yu/Watson/IBM@IBMUS             
             10/31/2006 09:36                                           cc 
             AM                        Dan E Poff/Watson/IBM@IBMUS, David  
                                       M Daly/Watson/IBM@IBMUS, Dilma M Da 
                                       silva/Watson/IBM@IBMUS, Doron       
                                       Shiloach/Watson/IBM@IBMUS, Edi      
                                       Shmueli/Watson/IBM@IBMUS, Jack      
                                       Kouloheris/Watson/IBM@IBMUS,        
                                       Jiuxing Liu/Watson/IBM@IBMUS,       
                                       Jonghyuk Choi/Watson/IBM@IBMUS      
                                                                   Subject 
                                       Re: domU network problem , 10/30    
                                       progress(Document link: Hao Yu)     
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           



PLEASE, post these to the mailing list, it is important that the community
sees these issues.
I'm happy you have some networking, I have some more network stability
fixes that I'll be pushing shortly.
-JX


                                                                           
             Hao Yu/Watson/IBM                                             
                                                                           
             10/30/06 05:16 PM                                          To 
                                       Jimi Xenidis/Watson/IBM@IBMUS       
                                                                        cc 
                                       David M Daly/Watson/IBM@IBMUS, Edi  
                                       Shmueli/Watson/IBM@IBMUS, Jonghyuk  
                                       Choi/Watson/IBM@IBMUS, Dan E        
                                       Poff/Watson/IBM@IBMUS, Jiuxing      
                                       Liu/Watson/IBM@IBMUS, Doron         
                                       Shiloach/Watson/IBM@IBMUS, Dilma M  
                                       Da silva/Watson/IBM@IBMUS, Jack     
                                       Kouloheris/Watson/IBM@IBMUS         
                                                                   Subject 
                                       domU network problem , 10/30        
                                       progress(Document link: Jimi        
                                       Xenidis)                            
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           



Hi Jimi,

Dan, Jiuxing and I worked together on the problem. First we have following
summaries

1.  the problem is now 'domU network not working properly' :
ping-to-outside runs into error after 30 seconds ; domU hangs in nc/netcat
test when receiving long stream (MB or so). For the pint-to-outside issue,
when domU runs into error, outside can still ping to the domU.

   cso238:/ # ping 9.2.78.83
   PING 9.2.78.83 (9.2.78.83) 56(84) bytes of data.
   64 bytes from 9.2.78.83: icmp_seq=1 ttl=64 time=28.8 ms
   64 bytes from 9.2.78.83: icmp_seq=2 ttl=64 time=4.24 ms
   64 bytes from 9.2.78.83: icmp_seq=3 ttl=64 time=3.81 ms
   64 bytes from 9.2.78.83: icmp_seq=4 ttl=64 time=10.0 ms
   64 bytes from 9.2.78.83: icmp_seq=5 ttl=64 time=5.05 ms
   64 bytes from 9.2.78.83: icmp_seq=6 ttl=64 time=9.65 ms
   64 bytes from 9.2.78.83: icmp_seq=7 ttl=64 time=10.0 ms
   64 bytes from 9.2.78.83: icmp_seq=8 ttl=64 time=10.0 ms
   64 bytes from 9.2.78.83: icmp_seq=9 ttl=64 time=3.96 ms
   64 bytes from 9.2.78.83: icmp_seq=10 ttl=64 time=10.0 ms
   64 bytes from 9.2.78.83: icmp_seq=11 ttl=64 time=3.89 ms
   64 bytes from 9.2.78.83: icmp_seq=12 ttl=64 time=2.73 ms
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available
   ping: sendmsg: No buffer space available

2. brctl does not work properly on our environment. 'strace brctl show'
indicates 'ioctl(3, SIOCGIFBR, 0xffc381d4)         = -1 EINVAL (Invalid
argument)' . And on SLES 10 environment, brctl show works fine.

In addition, how the dhcp problem is gone ? Bulent reconfiged the dhcp
server to have more show-live IP available . Now, domU can get IP

   cso238:/ # ifconfig
   eth0      Link encap:Ethernet  HWaddr 00:16:3E:F9:BB:B3
             inet addr:9.2.78.238  Bcast:9.2.78.255  Mask:255.255.255.0
             UP BROADCAST NOTRAILERS RUNNING MULTICAST  MTU:1500  Metric:1
             RX packets:39 errors:0 dropped:0 overruns:0 frame:0
             TX packets:19 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:1000
             RX bytes:3884 (3.7 Kb)  TX bytes:2508 (2.4 Kb)

   lo        Link encap:Local Loopback
             inet addr:127.0.0.1  Mask:255.0.0.0
             UP LOOPBACK RUNNING  MTU:16436  Metric:1
             RX packets:20 errors:0 dropped:0 overruns:0 frame:0
             TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
             collisions:0 txqueuelen:0
             RX bytes:1256 (1.2 Kb)  TX bytes:1256 (1.2 Kb)

We thought the 'ping error' problem seemed non trivial.

Regards,
Hao



Hao Yu

Commercial Scale Out
IBM T.J. Watson Research Center
1101 Kitchawan Rd/Route 134, Rm 36-019
Yorktown Heights, NY 10598-0218
914-945-1854, Email: yuh@xxxxxxxxxx


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