Using Fcip To Encapsulate Fc Packets; Fcip Impact On Existing Iscsi Configurations; Mpx200 High-Availability Configuration With Fully-Redundant Long-Distance Links - HP StorageWorks 6100 - Enterprise Virtual Array User Manual

StorageWorks MPX200 Multifunction Router 10 1 GbE Base Chassis with a HP StorageWorks
MPX200 Router 10 1 GbE Upgrade Blade. Note that FCIP is currently supported only on MPX200
1 GbE ports. See
Figure 57 MPX200 high-availability configuration with fully-redundant long-distance links
.

Using FCIP to encapsulate FC packets

With FCIP, gateways transport FC frames over an IP network. From the perspective of the local and
remote fabrics, the FC devices accessed through the gateways appear to be part of one unified fabric.
This is possible because FC traffic is carried over the IP network in such a way that the FC fabric and
all FC devices on the fabric are unaware of the presence of the IP network. Once configured, FCIP
instances on each gateway become active and establish their connectivity through the IP network.
The FC devices in the local fabric access the FC devices in the remote fabric using FC frames. The
FC frames are encapsulated in IP packets by the local gateway and then transmitted to the remote
gateway. The remote gateway strips the IP packet data and passes only the FC frames to the remote
FC devices. The gateways deployed for FCIP are configured to use TCP, which uses standard TCP
flow control and error recovery algorithms.

FCIP Impact on existing iSCSI configurations

This guide includes samples of FCIP and iSCSI configurations to illustrate some of the many possible
configurations available. Despite the number of permutations, there are really only two basic FCIP
configurations: a dedicated FCIP blade and a shared iSCSI/FCIP blade.
A dedicated MPX200 blade running only FCIP will not have any impact on a dedicated MPX200
blade running iSCSI. There is, however, an impact and possibly changes required for existing MPX200
iSCSI configurations when FCIP is added to the same blade. This must also be considered when
planning a new iSCSI/FCIP mixed blade configuration.
Configuring an FCIP route and specifying an FC and GE port pair take precedence over any previous
configuration for the port pair (FC/GE). This means that for an existing or new iSCSI configuration,
once an FCIP Route is configured, one FC port and one GE port are no longer available for iSCSI or
DM use.
For existing iSCSI configurations, there are two configuration cases to consider: one with a single FC
fabric (see Figure
connected to an MPX200 blade. In the single FC fabric case
can be resolved by rezoning any EVA targets that were zoned only with the FCIP FC port to the
102 MPX200 FCIP
Figure 57.
58) connected to an MPX200 blade and one with dual FC fabrics (see
(Figure 58), the impact is minimal and
Figure 59)