From: chresten@bb.aa   
      
   Well it is a static IP(dhcp). Or at least i pay for a static IP, and it   
   is the same all the time.  there is the same router for the 2 line, and   
   the problem is only on one line. And i have updatet the firmeware on the   
   Linksys router. And i have switch the router round.   
   :)   
   C   
      
   Barry Margolin wrote:   
   > In article <4ad60b3d$0$281$14726298@news.sunsite.dk>,   
   >  Chresten  wrote:   
   >   
   >> I have 2 ISP on a location whit a ADSL and VDSL line. And both use DHCP   
   >> to allocate a IP to the  ROUTER.   
   >> Some time(most of the time), when the is a renew(dhcp), on the wan side   
   >> off the router, from/to  the ISP.   
   >>   At  that instant i loose the TCP connection, it simple stop. An it is   
   >> only when there is a renew, i loose the connection.   
   >>   UDP an other type of connection is function OK, all the time. The ISP   
   >> wont extend the dhcp renew time(1/2 hour).   
   >>   What can i do ???   
   >>   
   >> :)   
   >>   
   >> -C   
   >   
   > Does your IP change when the renew happens?  TCP connections are keyed   
   > off the IP, so a connection can't be maintained across an IP change.   
   >   
   > Normally, a DHCP renewal should retain the same IP, unless the ISP is   
   > reorganizing their IP space and the old IP is no longer available.   
   >   
   > Another possibility is that there's a bug in your router, that it clears   
   > out its NAT table whenever there's a DHCP renewal, even if the IP hasn't   
   > changed.  Make sure you have the latest firmware, and if that doesn't   
   > help get a new router.   
   >   
      
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