No the DF bit is not set, use the tcp ip adjust to ensure the DF bit is set.
Regards, Joe Sanchez ( please excuse the brevity of this email as it was sent via a mobile device. Please excuse misspelled words or sentence structure.) On Nov 1, 2012, at 8:51 AM, Imran Ali <[email protected]> wrote: > Hi all, > > By default when bgp router sends update ...does it sets DF bit ? > question 1 > > in this case if the size of update packet let say is larger than > MTU of any of transit links ..then any transit router upon reception of > DF marked bgp update packet send an ICMP error , if icmp is filtered due > to any firewall then originating router will not reduce the MSS and this > results in oscilaitng bgp sessions > > http://nagendrakumar-nagendra.blogspot.com/2010/03/bgp-path-mtu-discovery.html > > does any one have experinced the same or can comment on this ? > > > 2) if bgp path mtu is enabled by default ..then do the router undergo > path mtu discovery ..and figures out lowest mtu of transit links and then > adjusts the [mss = lowes mtu - (ip headers) - (tcp headers) ] ..? > > > Blogs and organic groups at http://www.ccie.net > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html > > > > > > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
