This document describes how to interpret the link light status on an
Ethernet card on a Cisco ONS 15454.
There are no specific requirements for this document.
The information in this document is based on these software and
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Technical Tips Conventions for more information on document
Ethernet cards include:
The E100T and E1000-2 cards have been discontinued, but are included
here because they will continue to be supported until March 28, 2007. These
cards have been replaced with equivalent boards. The E100T-G is the functional
equivalent of the discontinued E100T-12, and the E1000-2-G is the functional
equivalent of the discontinued E1000-2. Refer to
of Life Announcement for E100T and E1000-2 cards for Cisco ONS 15454 for
The 15454 uses E100T and E100T-G cards for Ethernet (10 Mbps) and Fast
Ethernet (100 Mbps) and the E1000-2 and E1000-2-G cards for Gigabit Ethernet
(1000 Mbps). The E100T and E100T-G enable network operators to provide multiple
10/100 Mbps and the E1000-2 and E1000-2-G enable network operators to provide
multiple 1000 Mbps access drops for high-capacity customer LAN
Each port has one LED, which can turn Amber (yellow-orange) or Green.
This table shows the meaning of all possible LED states associated with the
specific Ethernet port:
Transmitting and Receiving.
Flashes proportionally to traffic.
Transmitting only or Receiving only.
Idle and Link Integrity is good.
Inactive Connection or Unidirectional Traffic.
Note: For additional information on any of the commands used in this
document, use the
Command Lookup Tool
(registered customers only)
In order to verify the Ethernet link status in Cisco Transport
Controller (CTC), select Performance >
Statistics under Card View.
Figure 1 – Link Status of the EPOS 100 Line
Figure 2 – Link Status of the EPOS 1000 Line
Figure 3 – Link Status of the EPOS 100 Line
Figure 4 – Link Status of the EPOS 1000 Line