Fiber Saver (2029) Implementation Guide

76 Fiber Saver (2029) Implementation Guide

Table 8. OCLD and OCI recommended channel assignments with 4TDM OCI cards

The System Manager provisioning process prevents mapping ports on the same

4TDM OCI card to different OCLD cards.

4.3 Cascading recommendations

Cascaded IBM 2029 configurations can involve any combination of hubbed-ring

and point-to-point networks. A single link can be cascaded through up to four IBM

2029 networks. Cascading offers more flexibility in the network design and

extends the maximum distance that can be achieved between devices attached

to IBM 2029 networks. With this flexibility, however, managing and tracking

end-to-end connectivity can become very complex. Therefore, it is extremely

important to have current and accurate IBM 2029 network configuration

documentation.

Cascading is achieved by connecting the shelves’ channels across different IBM

2029 networks. That is, the transmit (Tx) and receive (Rx) connectors of an OCI

card on one network are connected to the Rx and Tx connectors of an OCI card

on another network, respectively.

Consider the following points when you are designing a cascaded network:

• There is no requirement for a cascaded connection to use the same band or

channel in each IBM 2029 network.

• A link that has been extended through an IBM 2029 network via a 4TDM OCI

card can be cascaded to another network using single port OCI cards.

Intermixing of single port and 4TDM OCI cards is not supported for a link

within a network, but it is supported for cascading connections between

networks.

• A link that has been provisioned as a base (unprotected) channel in one

network can be cascaded to a high availability (protected) channel in another

network.

• Cascading IBM 2029 networks does not affect the link budgets of individual

networks.

Recommended Channel Assignments

Unprotected Channels Protected Channels

HUB shelf

OCLD Slot/Channel

REMOTE Shelf

OCLD Slot/Channel

4TDM OCI

Slot-Port /Channel

HUB and REMOTE

OCLD Slot/Channel

4TDM * OCI

Slot-Port/ Channel

1 1W 18 1E 6-1 1B 18/1E and 1/1W 5-1/1A or 6-1/1B

1 1W 18 1E 6-2 1B 18/1E and 1/1W 5-2/1A or 6-2/1B

1 1W 18 1E 6-3 1B 18/1E and 1/1W 5-3/1A or 6-3/1B

1 1W 18 1E 6-4 1B 18/1E and 1/1W 5-4/1A or 6-4/1B

18 1E 1 1W 5-1 1A

* Note: In protected mode, each channel’s A

slot and B slot OCIs are mutually exclusive.

18 1E 1 1W 5-2 1A

18 1E 1 1W 5-3 1A

18 1E 1 1W 5-4 1A