Metro Ethernet Routing Switch 8600 or MERS 8600 is a modular chassis router and/or switch manufactured by Nortel now acquired by Ciena.

The MERS 8600 supports the Provider Backbone Bridges (PBB), Provider Backbone Transport (PBT) technologies and carrier class Operations Administration & Maintenance (OAM) tools.

[1] Configurable as a 1.440 Terabit Switch cluster using SMLT and RSMLT protocols,[2] cluster failover (normally less than 100 millisecond).

[3] BT uses the MERS 8600 PBB/PBT technologies in its 21st Century Network (21CN)[4] and India has selected this platform for the most extensive IP network ever deployed by an international airport in India.

[5] The MERS 8600 has 3 chassis options The chassis can be configured with one or two CPU modules (8692SF), and is normally configured with two or three load balancing power supplies.