BOEv3 Unitized (BOEv3u) (BZX Only)

Each BOEv3u session assigned to a member will have three total ports available per unit for the member’s use:

• Secaucus Primary port (A)
• Secaucus Secondary port (B)
• Chicago DR port (C)

All three ports will have distinct IP addresses assigned. During normal operation, only the primary port in Secaucus (port A) will accept order/quote traffic. Sequence numbers are unified across all three unitized ports for a given session. Telnet connectivity testing can be done at any time (24/7).

Deep Replay Logins

Active Primary (A) and Secondary (B) BOEv3u ports support a limited message replay facility. (see Login, Replay, and Sequencing). To facilitate the occasional need for a deep replay of messages, BOEv3 logins support a specialized ReplayInstruction = D (Deep Replay) on inactive ports. Deep replay logins can only be used for deep replay. On a successful deep replay login, after Cboe has sent the requested messages, clients should logout and disconnect; otherwise Cboe will send a LogoutResponse and disconnect the port after an idle period of 30 seconds. Any order/quote traffic on a deep replay login will not be accepted and the session will be immediately disconnected.

Under normal operations, the active port will be the primary port (A) and the inactive ports are secondary (B) and DR (C). Upon promotion of either port to "active", any deep replay logins will be immediately terminated.

Order Handler Redundancy

Port B and C will only accept deep replay logins (ReplayInstruction = D), unless promoted to active. All other login attempts will be rejected. As a result of this design, customers may design their system to attempt to connect with regular logins (i.e. ReplayInstuction value other than D) to Port A, B, or C and can be confident that the port that accepts their login is the current primary.

Disaster Recovery Data Center

While DR activation may occur intraday, it will only occur only after Cboe has provided notification to customers.