the options to be considered is locating one of the Sysplex Timers in an intermediary site that is less than 40 km from one of the two sites (as can be seen in the diagram below). Other potential options can be evaluated when the RPQ is ordered.

Site 1

 

up to

 

Site 2

 

100 km

 

 

 

 

 

 

 

 

 

 

40 km max

 

 

 

 

40 km nom

 

 

9037

 

 

2 CLO

D

CLO

9037

D

 

 

 

CLO

D

links

 

D

 

11

12

 

 

W

 

11

12

1

W

 

 

1

 

 

 

10

 

2

 

 

10

 

2

3

W

 

 

8

 

4

 

W

 

9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D

 

9

 

3

D

 

 

 

8

 

4

 

D

 

 

7

6

5

1 ETR

D

 

7

6

5

 

 

M

 

M

 

 

 

 

 

 

 

 

ETR

 

 

 

M

1 ETR

ETR

 

 

ETR

link per

M

 

 

 

 

link per

 

 

 

 

CPC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ETR

 

 

CPC

 

 

 

 

 

 

 

 

ETR

 

 

 

 

Route A

 

 

 

 

 

 

 

D

 

 

 

 

D

ETR

 

 

ETR

W

 

 

 

 

 

 

 

 

W

 

 

 

D

 

 

 

 

 

 

 

 

D

 

 

 

 

 

M

 

1 ETR link

 

 

 

 

 

M

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

per CPC

 

 

 

 

 

 

 

CPC

 

 

 

 

 

 

 

 

hut with

 

 

CPC

 

 

 

 

 

 

 

 

 

 

 

amplifiers

 

 

 

 

 

 

 

 

 

 

Route B

 

 

 

 

Note: Midspan 9037 can also be located within 40 km of site 2 or on Route B. All ETR and CLO links are provisioned as 1 channel per wavelength.

z990 Theoretical Maximum Coupling Link Speed

Connectivity

z990 ISC-3

z990 ICB-2

z990 ICB-3

z990 ICB-4

Options

 

 

 

 

G5/G6 ISC

1 Gbps

n/a

n/a

n/a

Compatibility

 

 

 

 

z800/z900 ISC-3

2 Gbps

n/a

n/a

n/a

Peer Mode

 

 

 

 

z890/z990 ISC-3

2 Gbps

n/a

n/a

n/a

Peer Mode

 

 

 

 

G5/G6 ICB

n/a

333 MBps

n/a

n/a

Compatibility

 

 

 

 

z900 ICB-2

n/a

Not Supported

n/a

n/a

 

 

 

 

 

z990 ICB-2

n/a

Not Supported

n/a

n/a

 

 

 

 

 

z800/z900 ICB-3

n/a

n/a

1 GBps

n/a

Peer Mode

 

 

 

 

 

 

 

1 GBps Peer Mode

 

z890/z990 ICB-3

n/a

n/a

Recommendation

n/a

 

 

 

use ICB-4s

 

 

 

 

 

 

z890/z990 ICB-4

n/a

n/a

n/a

2 GBps

Peer Mode

 

 

 

 

 

 

 

 

 

ISC-3. InterSystem Channel-3 provides the connectivity required for resource or data sharing between the Cou- pling Facility and the systems directly attached to it.

ISC-3s are point-to-point connections that require a unique channel defi nition at each end of the channel. ISC-3 channels operating in Peer Mode provide con- nection between zSeries (z800/z900/z990) general purpose models and zSeries Coupling Facilities. ISC-3 channels operating in Compatibility Mode provide con- nection between zSeries and HiPerLink (ISC-2) channels on 9672 G5 and G6 and the 9674 R06 Models. A four port ISC-3 card structure is provided on the z990 pro- cessors. It consists of a mother card with two daughter cards which have 2 ports each. Each daughter card is capable of operation at 1 Gbps in Compatibility Mode or 2 Gbps in Peer Mode up to a distance of 10 km. From 10 to 20 km, an RPQ card which comes in 2 port incre- ments is available which runs at 1 Gbps in both Peer and Compatibility Modes. The mode is selected for each port via CHPID type in the IOCDS. The ports are acti- vated in one port increments.

ISC-2. HiPerLinks. HiPerLinks, based on single-mode CF links, are available on 9672s (G3 - G6) and 9674s only. ISC-3s replace HiPerLinks on zSeries 900 and z990 models.

ICB-2. The Integrated Cluster Bus-2 is used to provide high-speed coupling communication between a zSeries server or CF and a 9672 G5/G6 server or CF over short distances (~7 meters). For longer distances, ISC links must be used. The z990 features the STI-2 card which resides in an I/O cage and provides 2 ICB-2 ports each capable of up to 333 MBps. The ports are activated in one port increments. Up to 4 STI-2 cards, 8 ICB-2 links are available on the z990.

36

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IBM z/OS manual Z990 Theoretical Maximum Coupling Link Speed, Options