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Verifying the Installation 57
Each interface on each network module in a 3600 has its own LEDs to provide status. Ethernet
(two LEDs), Serial (five LEDs), PRI (four LEDs), and so on all have interface-specific LEDs.
Each type of interface can have a different number of LEDs to communicate status and activity.
Ethernet interfaces, for example, have only two LEDs: Link and Activity. The Link LED
specifies that the cable is properly connected to the hub or switch. The Activity LED specifies
that LAN traffic has been detected on the wire.
Branch Office Router Verification
LEDs are LEDs. The "Green is good" rule still applies no matter the type of router with which
you are dealing. Each branch office router has its own set of LEDs, as was the case with the
central site routers. Again, all models discussed previously are not mentioned; only a single
chassis is discussed.
1600 Router LEDs
The 1600 router is a mission-specific router. It's capable of sustaining one WIC, one BRI, and
one LAN interface. LEDs on the router consist of those appropriate to each type of interface as
well as two system LEDs. Refer to Figure 3-5 for the 1600 LEDs.
Figure 3-5
1600 Router LEDs