Network router maker Juniper Networks (JNPR) - Get Report was down 4.2% in active preopen Island trading as Cisco's (CSCO) - Get Report third-quarter results after the close Tuesday led the sector lower.

Other network equipment suppliers were also down, including

Ciena

(CIEN) - Get Report

, down 4.1%,

Corvis

(CORV) - Get Report

, off 5.9% ,

JDS Uniphase

(JDSU)

, down 5.4%, and

Extreme Networks

(EXTR) - Get Report

, down 5.1%.