Chapter 8 Management Network Connectivity

IP Addressing Scenarios

Scenario 3 is similar to Scenario 1, but only one ONS 15310-MA SDH node (#1) connects to the LAN (Figure 8-3). Two ONS 15310-MA SDH nodes (#2 and #3) connect to Node 1 through the SDH DCC. Because all three nodes are on the same subnet, Proxy ARP enables Node 1 to serve as a gateway for Nodes 2 and 3.

Note This scenario assumes all CTC connections are to Node 1. If you connect a laptop to either Node 2 or Node 3, network partitioning occurs, and neither the laptop or the CTC computer is able to see all nodes. If you want laptops to connect directly to end network elements, you need to create static routes (see Scenario 5) or enable the ONS 15310-MA SDH proxy server (see Scenario 7).

Figure 8-3 Scenario 3: Using Proxy ARP

CTC Workstation

IP Address 192.168.1.100

Subnet Mask 255.255.255.0

Default Gateway = N/A

LAN A

ONS 15310 #1

IP Address 192.168.1.10

Subnet Mask 255.255.255.0

Default Router = N/A

Static Routes = N/A

ONS 15310 #2

IP Address 192.168.1.20

Subnet Mask 255.255.255.0

Default Router = N/A

Static Routes = N/A

SDH RING

ONS 15310 #3

 

IP Address 192.168.1.30

 

Subnet Mask 255.255.255.0

271791

Static Routes = N/A

Default Router = N/A

 

You can also use proxy ARP to communicate with hosts attached to the craft Ethernet ports of DCC-connected nodes (Figure 8-4). The node with an attached host must have a static route to the host. Static routes are propagated to all DCC peers using OSPF. The existing proxy ARP node is the gateway for additional hosts. Each node examines its routing table for routes to hosts that are not connected to the DCC network but are within the subnet. The existing proxy server replies to ARP requests for these additional hosts with the node MAC address. The existence of the host route in the routing table ensures that the IP packets addressed to the additional hosts are routed properly. Other than establishing a static route between a node and an additional host, no provisioning is necessary. The following restrictions apply:

Only one node acts as the proxy ARP server for any given additional host.

A node cannot be the proxy ARP server for a host connected to its Ethernet port.

In Figure 8-4, Node 1 announces to Node 2 and 3 that it can reach the CTC host. Similarly, Node 3 announces that it can reach the ONS 152xx. The ONS 152xx is shown as an example; any network element can be set up as an additional host.

Cisco ONS 15310-MA SDH Reference Manual, Release 9.1 and Release 9.2

 

78-19417-01

8-5

 

 

 

Page 151
Image 151
Cisco Systems 15310-MA manual Scenario 3 Using Proxy ARP

15310-MA specifications

Cisco Systems has established itself as a leader in the networking domain, offering a wide array of solutions to meet the needs of modern businesses. Among its impressive product lineup are the Cisco 15310-CL and 15310-MA routers, designed to provide advanced network performance and reliability.

The Cisco 15310-CL is a versatile platform that primarily serves as a carrier-class router aimed at supporting high-speed data and voice services. It is built to handle the demands of large enterprises and service providers, offering a robust design that ensures maximum uptime and performance. One of its standout features is its modular architecture, which enables users to customize their configurations based on specific application needs. This scalability allows for future expansion without the need for a complete hardware overhaul.

Key technologies integrated into the Cisco 15310-CL include high-density Ethernet interfaces and a comprehensive suite of Layer 2 and Layer 3 protocol support. The device is capable of supporting multiple types of connections, including TDM, ATM, and Ethernet. This flexibility makes it an ideal choice for organizations that require seamless migration between various service types. Moreover, with features such as MPLS (Multiprotocol Label Switching) support and advanced Quality of Service (QoS) mechanisms, the router ensures that critical applications receive the necessary bandwidth and low latency required for optimal performance.

In contrast, the Cisco 15310-MA focuses on access solutions, providing a cost-effective entry point for businesses looking to enhance their network capabilities. It is well-suited for smaller offices or branch locations that need reliable connectivity without the expense and complexity associated with larger systems. The device supports a range of access methods and provides essential features like firewall capabilities, VPN support, and comprehensive security measures to protect sensitive data.

Both models benefit from Cisco's commitment to security and manageability, offering features like enhanced encryption protocols and user authentication mechanisms that help safeguard networks against threats. Additionally, they can be managed through Cisco’s intuitive software tools, simplifying configuration and monitoring tasks for IT administrators.

The Cisco 15310-CL and 15310-MA are ideal solutions for businesses seeking to enhance their network infrastructure, ensuring firms can keep pace with evolving technology demands while maintaining a focus on security and performance. Their combination of advanced features, modular capabilities, and robust support makes them valuable assets in the networking landscape.