O chestie strange pe o mashina de la mine:
Uneori, placa de retea intra in promiscous mode. Am vrut sa fac un
test: ieri seara am lasat un ping sa mearga carte o alta mashina de la
mine din retea:
[snip]
64 bytes from alpha.tuiasi.ro (193.226.26.110): icmp_seq=22310 ttl=255
time=245
--- x.tuiasi.ro ping statistics ---
87894 packets transmitted, 87843 packets received, +6 errors, 0% packet
loss
Dupa cum se vede, a trimis 87 de mii de pachete si nu a pierdut nici unul!
Si mashina asta face noaptea mirror de ftp-uri, trece prin-transa o
multime de posta, este serverul de web principal, deci are ceva trafic
prin placa.
Cand pe aceasta mashina mai pornesc X-ul sau cand trec din X in mod text
sau invers, placa de retea tot intra in promiscous mode, nu intotdeauna,
dar destul de des.
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
>From gamma.tuiasi.ro (193.226.26.104): Destination Host Unreachable
si numai:
[root@gamma root]# ifdown eth0; ifup eth0
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
eth0: Promiscuous mode enabled.
[root@gamma root]# ping x
o scoate din belea.
Place de retea e un eth0: RealTek RTL8139 Fast Ethernet at 0x6500, IRQ 11,
00:a0:d2:13:48:da iar placa video e un Cirrus CL-GD5446 (PCI Probed).
Deci de unde ar putea apare aceast deranjant comportament?
TIA,
Socrate
--
Radu Filip
Network Administrator @CCTI | tuiasi.ro
[EMAIL PROTECTED] [EMAIL PROTECTED]
http://socrate.tuiasi.ro/ http://www.ccti.tuiasi.ro/
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