Troubleshooting guide

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ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting Packet-over-SONET Uplink with Enhanced Gigabit Ethernet Interface Modules
If you determine that the interface is configured incorrectly, refer to the “Configuring Interfaces” chapter
in the Layer 3 Switching Software Feature and Configuration Guide.
Troubleshooting Packet-over-SONET Uplink with Enhanced
Gigabit Ethernet Interface Modules
The Packet-over-SONET (POS) uplink with enhanced Gigabit Ethernet interface module consists of
two port adapters that are attached to a carrier module. The port adapters are not hot-swappable, but the
interface module as a whole is hot-swappable. The Packet-over-SONET OC-12c uplink port adapter
resides on the left side of the interface module, and the one-port enhanced Gigabit Ethernet port adapter
resides on the right side. This combination provides an Ethernet port for connection to, or within, LANs,
and a POS uplink port for connection to an ISP or MAN.
The Packet-over-SONET OC-12c uplink port adapter supports 622-Mbps single-mode intermediate and
long-reach fiber connections. The Packet-over-SONET OC-12c uplink port adapter is a serial link, uses
SC-type connectors, and has built-in ACL functionality. It is available with 64K or 256K of memory.
Routing tables use this memory.
Note The port adapters within the Packet-over-SONET OC-12c interface module must have matching
routing table memory. As an example, if the Packet-over-SONET OC-12c POS port adapter has 64K
of routing table memory, the enhanced Gigabit Ethernet port adapter must have 64K of routing table
memory for the interface module to function properly.
For detailed Cisco Packet over SONET/SDH (POS) technology information, see the following
documents:
• White Paper, Cisco's Packet over SONET/SDH (POS) Technology, Support; Mission Accomplished
• SONET Tech Tips
Packet-over-SONET Uplink Interface Module LEDs
Table 10-7 describes the LEDs used to confirm and troubleshoot the operation of interface modules. The
LEDs on interface modules indicate the status of the modules and their ports.
Table 10-7 Packet-over-SONET OC-12c Uplink With Enhanced Gigabit Ethernet Interface Module LED
Descriptions
LED State Description
Rx (Receive) Green; otherwise, it is off Port is receiving a packet. Green
for approximately 50 ms.
Tx (Transmit) Green; otherwise, it is off Port is transmitting a packet. Green
for approximately 50 ms.
C/D (Carrier
Detect)
Green Carrier detect signal is received.
Off Carrier detect signal is not
received.