56 SAN Multiprotocol Routing: An Introduction and Implementation
with a packet loss rate of 0.01% is considered a low quality network, compared to
the baseline of zero frame loss in Fibre Channel networks.
4.6.5 Out-of-order packet delivery
Fibre Channel networks rely on in-order delivery of Fibre Channel frames. The
SAN router receiving FCIP traffic needs to ensure that the Fibre Channel frame
order is retained.
If IP packets are received out of order, as is often the case with shared IP
networks using Multiprotocol Label Switching (MPLS), the SAN router needs to
buffer them until it receives the complete sequence of packets.
Usually, the only effect of out-of-order packet delivery is slightly increased
latency. However, in extreme cases, the ...