This topic describes the DR process for ITC market data.

Normal Production Processing ITC Format

The following figure displays a simplified diagram of the ITC architecture in the Normal Production Processing environment.

In this state:

• Both feeds are available.
• TCP Replay is available.

DR Event - ITC Format

As quickly as feasible, GCC will declare a DR event using the  notification procedure.

Transition to DR Environment ITC Format

After the DR event, the architecture changes during the Transition to DR Environment stage depicted in the following figure.

In this state:

• Feeds A and B are not available.
• TCP Replay requests are not available.
• GCC will communicate DR event status and timeline to begin the Pre-Open activities in the DR environment 45 minutes in advance of the Market Opening.

Connection & Trading in DR Environment - ITC Format

After moving to Connection & Trading in the DR Environment, the architecture is depicted in the following figure.

In this state:

• Resume listening to Feed A and Feed B.
• The Feed A and Feed B source IP addresses will remain the same.
• The connection starts with Beginning of Week processing.
• Sequence numbers are reset.
• Instrument definitions are sent.
• TCP Replay and Market Recovery are available in the DR environment.
• TCP Replay and Market Recovery are not available for Pre-DR event Market Data.
• Multicast groups will remain the same.

Return to Production - ITC Format

GCC will notify customers when the DR event is resolved and the timeframe for re-establishing the ITC connection back to the Production environment. This reconnection to the CME Globex Production environment will be a scheduled procedure with sufficient notification time.