On 20/Apr/20 16:26, adamv0025@netconsultings.com wrote:
Interesting, so it is an MTU problem after all, I take it there’s no way to adjust the BPF (Berkeley Packet Filter) limit to let the 6020B sized PSNPs through?
Probably could - but I'd prefer solutions that don't mess with the base system, which ensures long term usability of FRR across future upgrades. The BPF man page has an interesting bug note: BUGS The read buffer must be of a fixed size (returned by the BIOCGBLEN ioctl). A file that does not request promiscuous mode may receive promiscuously received packets as a side effect of another file requesting this mode on the same hardware interface. This could be fixed in the kernel with ad- ditional processing overhead. However, we favor the model where all files must assume that the interface is promiscuous, and if so desired, must utilize a filter to reject foreign packets. Data link protocols with variable length headers are not currently sup- ported. Mark.