LinuxQuestions.org
Visit Jeremy's Blog.
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Networking
User Name
Password
Linux - Networking This forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.

Notices


Reply
  Search this Thread
Old 12-29-2008, 04:15 PM   #1
steven.c.banks
Member
 
Registered: Dec 2007
Location: Virginia
Distribution: RHEL
Posts: 44
Blog Entries: 1

Rep: Reputation: 15
ping results in random wrong data byte error


On one of our IBM Bladecenter servers, when I ping the gateway I get:

64 bytes from 10.50.1.250: icmp_seq=0 ttl=127 time=4.99 ms
64 bytes from 10.50.1.250: icmp_seq=3 ttl=127 time=2.45 ms
wrong data byte #40 should be 0x28 but was 0x7e
#8 8 9 a b c d e f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 26 27
#40 7e 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37
64 bytes from 10.50.1.250: icmp_seq=5 ttl=127 time=4.21 ms
64 bytes from 10.50.1.250: icmp_seq=6 ttl=127 time=0.281 ms

--- 10.50.1.250 ping statistics ---
7 packets transmitted, 4 received, 42% packet loss, time 6002ms
rtt min/avg/max/mdev = 0.281/2.985/4.996/1.814 ms, pipe 2

Basically, the server cannot communicate with any other server. When I ping 127.0.0.1 and one of the NICs in the chassis, they both ping as expected.

The bladecenter chassis consists of 14 blade servers and 4 NICs; none of the other blades in the chassis have this problem, so I don't think it is a NIC or cabling problem.

Also, this problem popped up only recently; prior to then the problem did not exist.

I compared the ifconfig and netstat output on this server to another server in the same chassis, and they look basically the same. Any help would be much appreciated.
 
Old 12-29-2008, 06:07 PM   #2
irishbitte
Senior Member
 
Registered: Oct 2007
Location: Brighton, UK
Distribution: Ubuntu Hardy, Ubuntu Jaunty, Eeebuntu, Debian, SME-Server
Posts: 1,213
Blog Entries: 1

Rep: Reputation: 83
Hmm. You might post the output of ifconfig on here to help. Other than that, is there any chance someone would have possibly changed the ethernet cable? Possibly a crossover problem in the wire. Try changing the cable, and see if that works.
 
Old 01-07-2009, 09:14 AM   #3
steven.c.banks
Member
 
Registered: Dec 2007
Location: Virginia
Distribution: RHEL
Posts: 44
Blog Entries: 1

Original Poster
Rep: Reputation: 15
Thanks. Sorry for the delay of my reply - out for the holidays.

In an IBM BladeCenter chassis, the 14 blades in the chassis share the same four I/O modules, so there are no Ethernet cables dedicated only to this one server.

The output from netstat -i:

[root@nss08 ~]# netstat -i
Kernel interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
bond0 1500 0 909 0 0 0 18 0 0 0 BMmRU
bond1 1500 0 33502 0 4302 0 434 0 0 0 BMmRU
eth0 1500 0 16931 0 4302 0 434 0 0 0 BMsRU
eth1 1500 0 16571 0 0 0 0 0 0 0 BMsRU
eth2 1500 0 461 0 0 0 18 0 0 0 BMsRU
eth3 1500 0 448 0 0 0 0 0 0 0 BMsRU
lo 16436 0 9770 0 0 0 9770 0 0 0 LRU

The only article I could find on IBM's web site regarding this problem is that the device driver has become corrupted, which implies that I need to reinstall RHEL.
 
Old 01-07-2009, 03:45 PM   #4
steven.c.banks
Member
 
Registered: Dec 2007
Location: Virginia
Distribution: RHEL
Posts: 44
Blog Entries: 1

Original Poster
Rep: Reputation: 15
Problem fixed - I reseated the blade in the chassis, which fixed the problem.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off



Similar Threads
Thread Thread Starter Forum Replies Last Post
memcpy_toio transfers data in 4 byte chunks, but I need to transfer data in one lump. jbreaka4lyfe Linux - Embedded & Single-board computer 2 06-02-2008 11:25 AM
Ping - Only want to see results SlowCoder Linux - General 6 05-19-2008 09:13 PM
RAID5 data rebuilding by mdadm results in corrupted data! rtyagi Linux - Newbie 0 03-26-2008 01:59 AM
Simple question about command syntax ping/log ping results ohalnet Linux - Networking 1 07-25-2006 04:46 AM
DNS not working, ping wrong data byte error escargot22026 Linux - Networking 3 12-31-2004 02:26 AM

LinuxQuestions.org > Forums > Linux Forums > Linux - Networking

All times are GMT -5. The time now is 08:06 AM.

Main Menu
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration