Dear Alexander, I have found that the maximum PING size is 1870. If the value is 1871 I get a message "ping: sendto: Message too long". But at size 1870...I am getting ping drops. The success rate is around 60%. Is it normal to get ping drops? Anyways I have set the MTU to 1870+28=1898 and still observing the BGP sessions.
regards, Adnan. On Wed, Jun 1, 2011 at 1:53 PM, Alexander Frolkin <[email protected]> wrote: > Hi, > >> I have resolved the session hanging issue by lowering the MTU value to >> 1920 on this router. But the BGP session is now flapping a lot and >> it's flapping with both the RRs now. Should I try the tcp-mss option >> or should i further play with the MTU value. I lowered the value to >> 1800 but the flapping was still there. Should I lower this further? > > If it helps, you can use ping to find out the MTU. On JunOS: > > ping <hostname> size 1472 do-not-fragment > > On Linux: > > ping -M do -s 1472 <hostname> > > Increase the size until the pings fail. The MTU is then the maximum > ping size plus 28. > > > Alex > > _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
