Qumran backfills behind Jericho that was introduced in 2015.

Qumran is a single chip version of Jericho. It has not intended to connect to a backplane crossbar switch -- and hence single chip. Its place in the hierarchy is to fill the deep buffer top-of-rack requirement. It's big brother Jericho is intended for a chassis environment where each line card gets a Jericho and there is a crossbar switch in the backplane. Some fixed form factor switches contain two Jericho ASICs directly connected through their crossbar interfaces in a 1 RU package so you can't tell the internals from looking at the package alone.

Three sizes of Qumram have been announced by Broadcom -- variously refered to as Papa Bear MX, Mama Bear AX, Baby Bear UX.

• Papa BCM88370 800 Gbps SERDES: 24 x 25G + 48 x 10G
• Mama BCM88470 300 Gbps SERDES: 16 x 25G + 32 x 10G (25G can be FABRIC)
• Baby BCM88270 120 Gbps SERDES: 8 x 10G + 28 x 2.5G NO FABRIC

Update Sept 2019