WEBISR4321-SEC/K9 Datasheet Overview. Get a Quote. Overview. 1/k9 router with Security Bundle. Its other specific. Quick Specs. pearance of Cisco ISR4321-SEC/ Product Details. Figure 2 shows the LEDs on the front panel of the Cisco ISR4321-SEC/K9. · There are eight LEDs on the front panel: POE0, FLASH, TEMP, PWR, SSD, ISC, FAN, and STAT.