Chapter 1 General Troubleshooting

CTC Operation Troubleshooting

Table 1-24 VLAN Cannot Connection to Network Device from Untag Port

Possible Problem

Solution

 

 

The Tagged ONS 15327 adds the

See the “Change VLAN Port Tag and Untagged Settings”

IEEE 802.1Q tag and the Untag

procedure on page 1-65.

ONS 15327 removes the Q-tag

The solution is to set both ports in the VLAN to Tagged to stop

without replacing the bytes. The NIC

the stripping of the 4 bytes from the data packet and prevents

of the network device categorizes the

the NIC card in the network access device from recognizing the

packet as a runt and drops the packet.

packet as a runt and dropping it. Network devices with

Dropped packets can also occur when

IEEE 802.1Q-compliant NIC cards can accept the tagged

ARP attempts to match the IP address

packets. Network devices with non-IEEE 802.1Q compliant

of the network device attached to the

NIC cards still drop these tagged packets. The solution might

Untag port with the physical MAC

require upgrading network devices with non-IEEE 802.1Q

address required by the network

compliant NIC cards to IEEE 802.1Q-compliant NIC cards.

access layer.

You can also set both ports in the VLAN to Untag, but you lose

 

IEEE 802.1Q compliance.

 

 

Procedure: Change VLAN Port Tag and Untagged Settings

Step 1 Display the CTC card view for the Ethernet card involved in the problem VLAN.

Step 2 Click the Provisioning > VLAN tabs (Figure 1-25).

Figure 1-25 Configuring VLAN Membership for Individual Ethernet Ports

Step 3 If the port is set to Tagged, continue to look at other cards and their ports in the VLAN until you find the port that is set to Untag.

Cisco ONS 15327 Troubleshooting Guide, R3.4

 

April 2003

1-65

 

 

 

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Cisco Systems ONS 15327 Procedure Change Vlan Port Tag and Untagged Settings, Click the Provisioning Vlan tabs Figure
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ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.
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