Inbound Bandwidth Limit

To maintain fair and orderly markets and prevent potential network congestion issues, Cboe monitors inbound bandwidth per 10 Gbps physical port at the customer access switch level. Any 10 Gbps physical network connection which receives inbound data exceeding a bandwidth limit of a 5 gigabit per second (5 Gbps) average measured over a two second time interval will automatically be disabled. This inbound bandwidth limit is based on observations of actual data traffic patterns and is equally applied across all Cboe customer 10 Gbps physical ports.

The bandwidth limit is an inbound data limit and thus does not apply to outbound data, such as market data, received through a physical port. However, if a physical network connection is disabled due to exceeding the inbound bandwidth limit, the physical network connection will not be able to submit inbound data or receive outbound data until it is re-enabled.

To re-enable an impacted physical network connection disabled due to exceeding the inbound bandwidth limit, a customer must contact Cboe NOC and provide a written post-mortem outlining the issue that caused the bandwidth limit to be exceeded and the actions taken to remediate the issue. Any connection disabled a second time within the same trading day for exceeding the inbound bandwidth limit will be re-enabled only after an additional written post-mortem is received and customer testing has been performed with Cboe NOC during standard Cboe maintenance hours.