Cisco Cisco ONS 15454 SONET Multiservice Provisioning Platform (MSPP) Guía Para Resolver Problemas

Introduction
 Prerequisites
      Requirements
      Components Used
      Conventions
 Problem
 Solution
 Related Information

This document describes the inability of E−Series Ethernet cards to stuff Ethernet frames in order to make
them a legal 64 bytes. This problem manifests itself in cases where there is a VLAN tagged on a port at one
drop of an Ethernet circuit and the same VLAN is untagged at another drop. This document also provides a
workaround for this problem.

There are no specific requirements for this document.

This document applies to all versions of E−series Ethernet cards for the ONS15454 and ONS15327. This
includes E100T−4, E100T−12, E100T−G, E1000−2, and E1000−2−G.

It also applies to ALL versions of software and is totally independent of any hardware combinations.

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.

Refer to the Cisco Technical Tips Conventions for more information on document conventions.

The inability to stuff Ethernet frames in order to make them legal (64 bytes) is seen in networks that have
untagged ports on one side and tagged ports on the other as this example shows.

Switch 1 −−− E−Series Tagged −−− SONET Ring −−− E−Series Untagged −−− Switch 2