Troubleshooting Guide

Background

The Cisco ONS CE−Series Ethernet card and ML−series cards support Packet Over Sonet (POS)/Resilient

Packet Ring (RPR) Encapsulation on two Virtual Concatenation Group (VCG)/POS ports using GFP−F

(ITU−T G.7041) or LEX (HDLC) Encapsulation.

Problem

When creating a circuit between CE−Series Ethernet card and ML−series cards, the error message (see arrow

A in Figure 1) appears on Cisco Transport Controller (CTC).

Here is the data flow for this specific circuit:

Cisco CE−series Card <−−> ONS 15310 <−−> OC12/SONET Connection <−−> ONS 15454 <−−> Cisco ML−series Card

Figure 1: Error Message − Transport Layer Failure

Solution

The failure is caused by the encapsulation mismatch on POS ports between CE−Series Ethernet card and

ML−Series card. Both cards support GFP−F and LEX (HDLC) encapsulation. If the POS port on one card is

configured to use the GFP−F encapsulation, and the POS port on the other card is configured to use the LEX

encapsulation, the circuit creation between these two cards fails.

Complete these steps to configure the port encapsulation for Cisco ONS CE−series card on Cisco ONS 15310:

Go to the CE−Series card view.2.

Select Provisioning > POS Ports > Line.3.

Select either HDLC or GFP−F from the Framing Type dropdown list (see arrow A in Figure 2).

Figure 2: Port Configuration on the CE−series Card

Complete these steps to configure the port encapsulation for Cisco ONS ML−Series card on Cisco ONS

15454:

Go to the ML−Series card view.2.

Select Provisioning > Card > Line.3.

Select either HDLC or GFP−F from the Mode dropdown list (see arrow A in Figure 3).4.