Ethernet satellite (ESAT) ports in the host node are logical ports (for example, esat-1/1/1) that represent physical ports on the remote (satellite) node. ESM in the host node treats ESAT ports similarly to all other physical ports in the system, even without knowing that those ports reside in a remote chassis. An example of an Ethernet satellite configuration is shown in Figure: Concept of ESAT.
Figure: Concept of ESAT
An SR OS ESAT complex (an SR OS host node with satellite nodes) supports multiple pairs of active and standby uplinks. The supported topologies are described in the following sections.