Reference Guide

Fabric OS FCIP Administrator’s Guide 55

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FCIP design considerations for the FR4-18i blade

FR4-18i blade ports

Each Brocade FR4-18i blade presents 16 FC ports and 16 virtual ports. Each GbE interface can

support up to eight FCIP tunnels which are represented as eight virtual ports on ge0 and 8 virtual

ports on ge1. The mapping of tunnels on ge0 and ge1 to virtual port numbers is represented in

Table 9.

FCIP design considerations for the FR4-18i blade

The following are general design considerations when configuring the Brocade FR4-18i blade:

• The Brocade FR4-18i blade can have up to eight tunnels per GbE interface.

• Source and destination IP addresses are defined on the FCIP tunnel. FCIP circuits are not

supported; therefore, FCIP trunking is also not supported.

• If the source and destination IP addresses are not on the same subnet, an IP static route must

be defined.

• FCIP is not supported through Network Address Translation (NAT).

• When an FR4-18i blade is installed on a DCX that includes FC8-64 blades, ports 0 through 55

of the FC8-64 blade can route to FR4-18i VE_Ports and vice versa, but ports 56 through 63

cannot route to FR4-18i VE_Ports. If ports 56 through 63 and FR4-18i VE_Ports are on the

default switch or on the same logical switch in a Virtual Fabrics (VF) configuration, those ports

will not be able to send traffic between each other. There are no general restrictions regarding

FR4-18i blades and FC8-64 blades coexisting in the same chassis. Furthermore, there are no

specific coexistence restrictions in the same chassis if ports 56 through 63 of the FC8-64

blade and the FR4-18i blade VE_Ports are on different logical switches or not part of the

default switch and therefore are not allowed to route to each other. This restriction does not

apply to the DCX-4S. On a DCX-4S, ports 0 through 63 of the FC8-64 blade can route to

FR4-18i VE_Ports and vice versa.

• The FR4-18i and FX8-24 blades cannot be supported in the same chassis using Fabric OS v7.0

and later.

TABLE 9 FR4-18i blade tunnel and virtual port numbering

GbE ports Tunnels Virtual ports

ge0 0

ge1 0