[Bridge] Bridge IP unreachable

Wayback MachineAbout this captureCOLLECTED BY Organization: Alexa Crawls Starting in 1996, Alexa Internet has been donating their crawl data to the Internet Archive. Flowing in every day, these data are added to the Wayback Machine after an embargo period. Collection: Alexa Crawls DE Crawl data donated by Alexa Internet. This data is currently not publicly accessible TIMESTAMPSloadingLennert Buytenhekbuytenh@gnu.org
Mon, 3 Apr 2000 06:53:10 +0200 (MEST)On Mon, 3 Apr 2000, Ernest Yik wrote:> Hi,Hello again, :)> > > Got a rather tricky problem here. The IP address of the bridge> > > machine (Slackware 7, 2.2.14 kernel, bridge-0.0.4+ipchains) will become> > > unreachable from both external interfaces (eth0 & eth1) after some time,> > > without any easily observable sequence or timing.> > > > > > When the bridge IP is unreachable from the outside :> > > > > > 1. Bridging function is completely normal;> > > 2. No observable problems with the output of ifconfig, brctl showbr etc;> > > 3. “ifconfig br0 down ; ifconfig br0 up” didn’t help;> > > 4. Access from the bridge to external IPs is normal (e.g. pinging an> > > external host), and after this outbound traffic, inbound traffic> > > works again.> > > > What does ‘arp -n’ on the bridge box say if it is stuck and you’re pinging> > it from somewhere?>> When the box is stuck and pinging it from another machine (on> the same network), ‘arp -n’ shows nothing.Okay, this tells me at least something. Could you send me the output of’tcpdump -i -R -e -x -v -n’ on the bridge box, whilepinging it (you can send it in private if you want) ?> So far I found that under two cases the box will come alive again :>> 1. Generate some outbound traffic from the box> 2. Accessing the box from the default gateway>> It means that when the box is stuck, it is still accessible from> hosts _outside_ the local net, through the default gateway. Please let> me know if there are any tests that I can try.Well, you could tell me some other things first. Is your network coax,hubbed ethernet or switched ethernet? What kind of network cards are inthe bridge box?> Thanks for your help.Thanks for your patience.greetings,Lennert

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