Hca3-O Lr (1X Ifb) Fanout (Fc 0170) - IBM z13s Technical Manual

data set (IOCDS). The coupling links can be defined as shared between images within a
CSS. They also can be spanned across multiple CSSs in a CPC.
Each HCA3-O (12x IFB) fanout has an assigned Adapter ID (AID) number. This number must
be used for definitions in IOCDS to create a relationship between the physical fanout location
and the channel-path identifier (CHPID) number. For more information about AID numbering,
see "Adapter ID number assignment" on page 152.
For more information about how the AID is used and referenced in the hardware configuration
definition (HCD), see Implementing and Managing InfiniBand Coupling Links on IBM System
z, SG24-7539.
When STP is enabled, IFB coupling links can be defined as timing-only links to other z13,
zEC12, zBC12, z196, and z114 CPCs.
12x IFB and 12x IFB3 protocols
These protocols are supported by the HCA3-O for 12x IFB feature:
12x IFB3 protocol: When HCA3-O (12xIFB) fanouts are communicating with HCA3-O
(12x IFB) fanouts and are defined with four or fewer CHPIDs per port, the 12x IFB3
protocol is used.
12x IFB protocol: If more than four CHPIDs are defined per HCA3-O (12xIFB) port, or
HCA3-O (12x IFB) features are communicating with HCA2-O (12x IFB) features on
zEnterprise or System z10 CPCs, links run with the 12x IFB protocol.
The HCA3-O feature that supports 12x InfiniBand coupling links is designed to deliver
improved service times. When no more than four CHPIDs are defined per HCA3-O (12xIFB)
port, the 12x IFB3 protocol is used. When you use the 12x IFB3 protocol, synchronous
service times are up to 40% faster than when you use the 12x IFB protocol. Unlike the
HCA3-O 12x InfiniBand links, the ICA SR cannot define more than four CHPIDS per port.

4.6.5 HCA3-O LR (1x IFB) fanout (FC 0170)

The HCA3-O LR fanout for 1x InfiniBand provides an optical interface that is used for coupling
links. The four ports on the fanout are dedicated to coupling links to connect to z13, z13s,
zEC12, zBC12, z196, and z114 servers. Up to 8 HCA3-O LR (1xIFB) fanouts are supported
by z13s servers, and provide up to 32 ports for coupling links.
The HCA-O LR fanout supports InfiniBand 1x optical links that offer long-distance coupling
links. The cable has one lane that contains two fibers. One fiber is used for transmitting, and
the other fiber is used for receiving data.
Each connection supports a link rate of up to 5 Gbps if connected to a z13, z13s, zEC12,
zBC12, z196, or z114 server. It supports a link rate of 2.5 Gbps when connected to a z
Systems qualified DWDM. The link rate is auto-negotiated to the highest common rate.
The fiber optic cables are 9-µm SM optical cables that terminate with an LC Duplex
connector. With direct connection, the supported unrepeated distance
miles), and up to 100 km (62 miles) with z Systems qualified DWDM.
A fanout has four ports for optical link connections, and supports up to 16 CHPIDs across all
four ports. These CHPIDs are defined as channel type CIB in the IOCDS. The coupling links
can be defined as shared between images within a channel subsystem, and also can be
spanned across multiple CSSs in a server.
3
On special request, see http://www.ibm.com/systems/z/advantages/pso/cflinks.html
Chapter 4. Central processor complex I/O system structure
3
is up to 10 km (6.2
151