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  •  alancy
      alancy
Re: CentOS5.7 network not always connect
#4
Newbie
Joined: 2012/2/18
From
Posts: 2
Thanks for the replay.

After try difference versions of CentOS, I guss that could be the hardware problem. I will lost the warrenty if I open the case. so that I can not use my own ethernet card. I return the computer to Bestbuy. Here is the model: ASUS CM1831-CA-3AA.
Posted on: 2012/2/21 1:05
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  •  pschaff
      pschaff
Re: CentOS5.7 network not always connect
#3
Moderator
Joined: 2006/12/13
From Tidewater, Virginia, North America
Posts: 18773
Welcome to the CentOS fora, and congratulations on being one of the select few to do the recommended reading before posting.

You might want to try ELRepo kmod-r8168 or kmod-r8168-xen if sticking with the Xen kernels.
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Recommended reading: FAQ & Readme first ; Search hint: google "your topic site:centos.org"; Smart Questions
Posted on: 2012/2/18 12:52
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  •  TrevorH
      TrevorH
Re: CentOS5.7 network not always connect
#2
Moderator
Joined: 2009/9/24
From Brighton, UK
Posts: 6312
Quote:

2.6.18-274.18.1.el5xen i686 i386


Are you intending to run Xen Virtual Machines on your computer? You have the xen kernel installed and if you are not going to use it then you would be better off installing the package 'kernel' rather than 'kernel-xen'. You'll also need to edit /etc/sysconfig/kernel and change the default kernel type from 'kernel-xen' to 'kernel'.
_________________
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Posted on: 2012/2/18 5:51
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  •  alancy
      alancy
CentOS5.7 network not always connect
#1
Newbie
Joined: 2012/2/18
From
Posts: 2
Hello there,

I installed CentOS5.7 freshly and did all updates. however my network connect do not work properly: it does not always connect.

- I can see the interruptions (between seq=6 and seq=45) when I ping linux2 (192.168.1.102) in the LAN:
*************
PING 192.168.1.102 (192.168.1.102) 56(84) bytes of data.
64 bytes from 192.168.1.102: icmp_seq=1 ttl=64 time=2.86 ms
64 bytes from 192.168.1.102: icmp_seq=2 ttl=64 time=0.356 ms
64 bytes from 192.168.1.102: icmp_seq=3 ttl=64 time=0.347 ms
64 bytes from 192.168.1.102: icmp_seq=4 ttl=64 time=0.356 ms
64 bytes from 192.168.1.102: icmp_seq=5 ttl=64 time=0.348 ms
64 bytes from 192.168.1.102: icmp_seq=6 ttl=64 time=0.348 ms <<<<<<<
64 bytes from 192.168.1.102: icmp_seq=45 ttl=64 time=1004 ms <<<<<<<<
64 bytes from 192.168.1.102: icmp_seq=46 ttl=64 time=4.61 ms
64 bytes from 192.168.1.102: icmp_seq=47 ttl=64 time=0.351 ms
******************

- I can ssh linux2, but lost response in every minute. The same thing happens when I ssh this machine from linux2.

- I can access Internet, but lost connection from time to time.

- I turn off firewall, not work.

- I also have Window7 installed in this machine and every thing is fine when I using Windows7 for Internet connection and ssh to linux2, so that I am assuming the hardware should not be a problem. This is a brand new PC.

Any help and suggestions are highly appreciated.

Thanks

Alancy

my system information 
== BEGIN uname -rmi ==
2.6.18-274.18.1.el5xen i686 i386
== END   uname -rmi ==

== BEGIN rpm -qa \*-release\* ==
adobe-release-i386-1.0-1
centos-release-notes-5.7-0
centos-release-5-7.el5.centos
== END   rpm -qa \*-release\* ==

== BEGIN cat /etc/redhat-release ==
CentOS release 5.7 (Final)
== END   cat /etc/redhat-release ==

== BEGIN getenforce ==
Permissive
== END   getenforce ==

== BEGIN free -m ==
             total       used       free     shared    buffers     cached
Mem:          7334       1271       6062          0         64        625
-/+ buffers/cache:        582       6751
Swap:        16383          0      16383
== END   free -m ==

== BEGIN lspci -nn ==
00:00.0 Host bridge [0600]: Advanced Micro Devices [AMD] RS780 Host Bridge [1022:9600]
00:01.0 PCI bridge [0604]: ASUSTeK Computer Inc. RS880 PCI to PCI bridge (int gfx) [1043:9602]
00:04.0 PCI bridge [0604]: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 0) [1022:9604
]
00:07.0 PCI bridge [0604]: Advanced Micro Devices [AMD] RS780 PCI to PCI bridge (PCIE port 3) [1022:9607
]
00:0a.0 PCI bridge [0604]: Advanced Micro Devices [AMD] RS780/RS880 PCI to PCI bridge (PCIE port 5) [102
2:9609]
00:11.0 SATA controller [0106]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 SATA Controller [IDE mode] [1002:
4390]
00:12.0 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
00:12.1 USB Controller [0c03]: ATI Technologies Inc SB7x0 USB OHCI1 Controller [1002:4398]
00:12.2 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
00:13.0 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI0 Controller [1002:4397]
00:13.1 USB Controller [0c03]: ATI Technologies Inc SB7x0 USB OHCI1 Controller [1002:4398]
00:13.2 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB EHCI Controller [1002:4396]
00:14.0 SMBus [0c05]: ATI Technologies Inc SBx00 SMBus Controller [1002:4385] (rev 3c)
00:14.1 IDE interface [0101]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 IDE Controller [1002:439c]
00:14.2 Audio device [0403]: ATI Technologies Inc SBx00 Azalia (Intel HDA) [1002:4383]
00:14.3 ISA bridge [0601]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 LPC host controller [1002:439d]
00:14.4 PCI bridge [0604]: ATI Technologies Inc SBx00 PCI to PCI Bridge [1002:4384]
00:14.5 USB Controller [0c03]: ATI Technologies Inc SB7x0/SB8x0/SB9x0 USB OHCI2 Controller [1002:4399]
00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 0 [1022:1600]
00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 1 [1022:1601]
00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 2 [1022:1602]
00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 3 [1022:1603]
00:18.4 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 4 [1022:1604]
00:18.5 Host bridge [0600]: Advanced Micro Devices [AMD] Family 15h Processor Function 5 [1022:1605]
01:05.0 VGA compatible controller [0300]: ATI Technologies Inc 760G [Radeon 3000] [1002:9616]
01:05.1 Audio device [0403]: ATI Technologies Inc RS780 Azalia controller [1002:960f]
02:00.0 Network controller [0280]: Ralink corp. RT2860 [1814:0781]
03:00.0 USB Controller [0c03]: Device [1b21:1042]
04:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Et
hernet controller [10ec:8168] (rev 06)
== END   lspci -nn ==

== BEGIN lsusb ==
Bus 007 Device 001: ID 0000:0000  
Bus 002 Device 002: ID 058f:6362 Alcor Micro Corp. Flash Card Reader/Writer
Bus 002 Device 001: ID 0000:0000  
Bus 003 Device 001: ID 0000:0000  
Bus 001 Device 001: ID 0000:0000  
Bus 006 Device 001: ID 0000:0000  
Bus 004 Device 001: ID 0000:0000  
Bus 004 Device 003: ID 0461:0010 Primax Electronics, Ltd 
Bus 004 Device 002: ID 0461:4de2 Primax Electronics, Ltd 
Bus 005 Device 001: ID 0000:0000  
== END   lsusb ==

== BEGIN rpm -qa kmod\* kmdl\* ==
kmod-gfs-xen-0.1.34-15.el5.centos
kmod-gfs-0.1.34-15.el5.centos
kmod-gnbd-0.1.5-2.el5.centos
kmod-gnbd-xen-0.1.5-2.el5.centos
== END   rpm -qa kmod\* kmdl\* ==

== BEGIN ifconfig -a ==
eth0      Link encap:Ethernet  HWaddr 54:04:A6:8A:28:D3  
          inet addr:192.168.1.106  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::5604:a6ff:fe8a:28d3/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:34026 errors:0 dropped:0 overruns:0 frame:0
          TX packets:24919 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:30745010 (29.3 MiB)  TX bytes:3928933 (3.7 MiB)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:664 errors:0 dropped:0 overruns:0 frame:0
          TX packets:664 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:59764 (58.3 KiB)  TX bytes:59764 (58.3 KiB)

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:37550 errors:0 dropped:37550 overruns:0 frame:37550
          TX packets:28044 errors:0 dropped:106 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:32633594 (31.1 MiB)  TX bytes:4279360 (4.0 MiB)
          Interrupt:252 Base address:0x8000 

sit0      Link encap:IPv6-in-IPv4  
          NOARP  MTU:1480  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth1     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

veth3     Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:28061 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37534 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:4311562 (4.1 MiB)  TX bytes:32632080 (31.1 MiB)

vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.2    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

vif0.3    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00  
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:29 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 b)  TX bytes:6767 (6.6 KiB)

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF  
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:9034 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:1902062 (1.8 MiB)  TX bytes:0 (0.0 b)

== END   ifconfig -a ==

== BEGIN brctl show ==
bridge name     bridge id               STP enabled     interfaces
virbr0          8000.000000000000       yes
xenbr0          8000.feffffffffff       no              vif0.0
                                                        peth0
== END   brctl show ==

== BEGIN route -n ==
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 eth0
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0
169.254.0.0     0.0.0.0         255.255.0.0     U     0      0        0 eth0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 eth0
== END   route -n ==

== BEGIN cat /etc/resolv.conf ==
; generated by /sbin/dhclient-script
search ed.shawcable.net
nameserver 64.59.184.13
nameserver 64.59.184.15
== END   cat /etc/resolv.conf ==

== BEGIN grep net /etc/nsswitch.conf ==
#networks:   nisplus [NOTFOUND=return] files
#netmasks:   nisplus [NOTFOUND=return] files     
netmasks:   files
networks:   files
netgroup:   nisplus
== END   grep net /etc/nsswitch.conf ==

== BEGIN chkconfig --list | grep -Ei 'network|wpa' ==
NetworkManager  0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
wpa_supplicant  0:off   1:off   2:off   3:off   4:off   5:off   6:off
== END   chkconfig --list | grep -Ei 'network|wpa' ==
Posted on: 2012/2/18 5:47
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