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SubjectRe: ...anyone seeing strange network black-out since 2.2.2?
On Mon, Mar 22, 1999 at 11:22:23PM +0000, Alan Cox wrote:
> > > Since 2.2.2 I experience strange network lookup: during 5min-20minutes
> > > I have a complete black out of connection to all the host that are
> > > behind a bridge. It seems that the arp reply is never processed, or
> > > received. A host with 2.2.1 on the same cable is working well.
>
> If you are seeing that behaviour, and especially if you some brands
> of 3com bridge check with tcp dump both sides. My guess would be the bridge
> is eating the packets.
>

I cannot tcpdump the other side, sorry... but I think you could be
right:

And Jim Zajkowski <jamesez@umich.edu> wrote:

> Are you crossing routers? Try pinging your router once every two minutes
> from the Linux box and see if it goes away.

...yes, I am pinging the router every minute and since then the network
is working flawlessly. So... bridge problem? Or the "gc_min_interval"
suggestion can matter? Note: this not a server, routing is static, ip
load is very low. The other machine is a network server and never has
problem... but this could be understandable, I see now, if the problem
is that the bridge "forgets" to bridge...

(0)pern:~/tmp% arp -v
Address HWtype HWaddress Flags Mask Iface
router ether 00:00:0C:0A:3D:E5 C eth0
upco.es ether 00:A0:C9:AD:37:A6 C eth0
clint.dea.icai.upco.es ether 00:A0:C9:B4:1A:23 C eth0
Entries: 3 Skipped: 0 Found: 3

the first two entries are "behind" the switch. The tird is directly
connected via an hub. (A subnote: switch and bridge are the same
beast, or not?)

Romano


--
Romano Giannetti, Professor - Univ. Pontificia Comillas (Madrid, Spain)
Electronic Engineer - phone +34 915 422 800 ext 2410 fax +34 915 596 569

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