CentOS5.7 network not always connect
Posted by alancy on 2012/2/18 5:47:57
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
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' ==
Re: CentOS5.7 network not always connect
Posted by TrevorH on 2012/2/18 5:51:30
Quote:
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'.
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'.
Re: CentOS5.7 network not always connect
Posted by pschaff on 2012/2/18 12:52:42
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.
You might want to try ELRepo kmod-r8168 or kmod-r8168-xen if sticking with the Xen kernels.
Re: CentOS5.7 network not always connect
Posted by alancy on 2012/2/21 1:05:58
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.
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.
This Post was from: https://www.centos.org/newbb/viewtopic.php?forum=40&topic_id=35877