Description of problem: I used to get boot message by the tool netconsole on SLES(D) platform successful,I tried to get boot message in RHEL 6.1/5.7 failed now ,but it can get the panic info by the netconsole. Version-Release number of selected component (if applicable): Red Hat Enterprise Linux Server release 6.1 Red Hat Enterprise Linux Server release 5.7 How reproducible: always Steps to Reproduce: 1.setup the netconsole env on the server 2.reboot the machine 3.use the command "netcat -l -u -p xxxx" from on the client Actual results: Can't capture the boot message by netconsole but the panic info can be captured. Expected results: Also capture the panic and boot message like SLES(D) platform. Additional info: My network card support netpoll. UDP pakets and ethernet devices are supported.
Definitely not a net-tools problem. From the description I'm not sure whether the problem is in server (kernel) or client (netcat). Let's start with netcat.
*** Bug 736241 has been marked as a duplicate of this bug. ***
As far as I know, there's no RHEL package providing the 'netcat' command. It's not possible to run 'nc' with both -l and -p switches. Are you using nmap's 'ncat'?
(In reply to comment #1) > Definitely not a net-tools problem. From the description I'm not sure whether > the problem is in server (kernel) or client (netcat). Let's start with netcat. I tried to compile many types of kernel in server but it still can't get the boot message. In client(RHEL) i can get a small number of boot message from the server(SLED platform). [root@test ~]# netcat -l -u -p 33333|tee -i netlog [ 13.004919] device-mapper: uevent: version 1.0.3 [ 13.344368] loop: module loaded [ 15.846877] fuse init (API version 7.13) [ 16.195994] type=1505 audit(1315419142.000:2): operation="profile_load" pid=1228 name=/bin/ping [ 16.248971] type=1505 audit(1315419142.052:3): operation="profile_load" pid=1245 name=/sbin/klogd [ 16.294348] type=1505 audit(1315419142.096:4): operation="profile_load" pid=1273 name=/sbin/syslog-ng [ 16.336467] type=1505 audit(1315419142.140:5): operation="profile_load" pid=1276 name=/sbin/syslogd [ 16.443685] type=1505 audit(1315419142.248:6): operation="profile_load" pid=1285 name=/usr/sbin/avahi-daemon [ 16.565766] type=1505 audit(1315419142.372:7): operation="profile_load" pid=1295 name=/usr/sbin/identd [ 16.638547] type=1505 audit(1315419142.444:8): operation="profile_load" pid=1304 name=/usr/sbin/mdnsd [ 16.739974] type=1505 audit(1315419142.544:9): operation="profile_load" pid=1318 name=/usr/sbin/nscd [ 16.797978] type=1505 audit(1315419142.604:10): operation="profile_load" pid=1319 name=/usr/sbin/ntpd [ 16.836358] type=1505 audit(1315419142.640:11): operation="profile_load" pid=1320 name=/usr/sbin/traceroute [ 17.541346] microcode: CPU0 sig=0x306a2, pf=0x10, revision=0x8 [ 17.622104] microcode: CPU1 sig=0x306a2, pf=0x10, revision=0x8 [ 17.625567] microcode: CPU2 sig=0x306a2, pf=0x10, revision=0x8 [ 17.628943] microcode: CPU3 sig=0x306a2, pf=0x10, revision=0x8 [ 17.632075] microcode: CPU4 sig=0x306a2, pf=0x10, revision=0x8 [ 17.635282] microcode: CPU5 sig=0x306a2, pf=0x10, revision=0x8 [ 17.638584] microcode: CPU6 sig=0x306a2, pf=0x10, revision=0x8 [ 17.641866] microcode: CPU7 sig=0x306a2, pf=0x10, revision=0x8 [ 17.645199] Microcode Update Driver: v2.00 <tigran.co.uk>, Peter Oruba [ 18.626079] NET: Registered protocol family 10 [ 19.605404] BIOS EDD facility v0.16 2004-Jun-25, 1 devices found [root@test ~]# ^C [root@test ~]# cat /etc/issue Red Hat Enterprise Linux Server release 6.1 (Santiago) Kernel \r on an \m [root@test ~]# uname -r 2.6.32-193.el6.x86_64
(In reply to comment #3) > As far as I know, there's no RHEL package providing the 'netcat' command. > It's not possible to run 'nc' with both -l and -p switches. Are you using > nmap's 'ncat'? in fact there is no netcat package providing. so i downloaded a tarball(netcat-0.7.1.tar.bz2) and installed it.
(In reply to comment #5) > (In reply to comment #3) > > As far as I know, there's no RHEL package providing the 'netcat' command. > > It's not possible to run 'nc' with both -l and -p switches. Are you using > > nmap's 'ncat'? > > in fact there is no netcat package providing. > so i downloaded a tarball(netcat-0.7.1.tar.bz2) and installed it. I can't really help you with software we don't ship. I also doubt a netcat client is dropping some messages and some not. I'd check the network. Anyhow, since I can't do anything here, moving to kernel. I guess they won't have anything to add, though.
We don't support software we don't ship. Closed as NOTABUG. P.