MTU Cisco vs Juniper

From http://www.gossamer-threads.com/lists/nsp/juniper/15749
... but remember that Cisco and Juniper also disagree
about what ping "size" means. Cisco means it to be the size of the
entire packet, Juniper means it to be the size of the ping payload, so
in the case of IPv4 you would need to subtract 28 (20 bytes IP, 8 bytes
ICMP) from the "size" param to match a Cisco side. Between that and the
mtu issue above, Cisco and Juniper have created a real mess for
inter-provider MTU negotiation.

Защо не го намерих това преди 2 часа :(