When the GE-2 line module or the GE-HDE line module is installed in the ERX-1440 router, it delivers full bandwidth of 2 Gbps per port only when installed in slot 2 or slot 4, and when the SRP-40G+ module is used in the router. When the module is installed in any other ERX-1440 slot, it delivers a maximum bandwidth of 2 Gbps per line module (1 Gbps maximum at the ingress and 1 Gbps maximum at the egress). Therefore, of the maximum 24 possible ports for the module in an ERX-1440 chassis (that is, two ports in each of 12 slots), full bandwidth is delivered only on a maximum of four ports (those in slots 2 and 4).
When the GE-2 line module or the GE-HDE line module is installed in either the ERX-1440 router or the ERX-310 router and both ports are active, line rate performance is achieved only with packets that are 174 bytes or larger. The module might not achieve line rate with packets that are smaller than 174 bytes.