Trunk Port Information

Basic LS2020 Configuration Tasks

•Subnet mask for the NP’s Ethernet address

The subnet mask for the NP’s Ethernet address speciﬁes which portion of the IP address is the network number and which portion is the host ID. This mask is the same for all nodes on the Ethernet LAN attached to the primary NP. You can obtain the subnet mask from the Ethernet LAN administrator.

•Default router (only if needed for reaching the NMS)

If an Ethernet LAN is attached to the primary NP, but the NMS is not directly connected to that Ethernet LAN, a default router can be conﬁgured as the means for communicating network management trafﬁc between the NP and the NMS. The IP address for the default router has the same network number as the attached Ethernet LAN (this number must be different from the network number of the LS2020 network). The IP address for the default router also has a host number assigned by the Ethernet LAN administrator.

If you plan to operate with a single physical LS2020 network under your network number and the LS2020 network is a class C network, record 255.255.255.0 as the subnet mask. (For a class B network without subnetting, record 255.255.0.0 as the subnet mask; for a class A network without subnetting, record 255.0.0.0 as the subnet mask.)

Network management can also be accomplished by means of an Ethernet LAN connected to an ordinary Ethernet data port (that is, an Ethernet access card port) on the LS2020 node. The NMS, however, must be attached directly to that Ethernet LAN. In this case, do not conﬁgure the NP’s Ethernet address or default router address. Furthermore, in the current release, to provide access control over Ethernet ports that can be used by an NMS, a port conﬁguration parameter has been added which allows you to specify whether IP trafﬁc destined for an NP is forwarded or blocked. This conﬁguration parameter, lsLanPortNPTrafﬁcFilter, determines whether or not inbound frames received on an Ethernet port are delivered to any NP in the network. The default value of this parameter for all access card Ethernet LAN ports is to block IP trafﬁc to an NP. Therefore, you must explicitly set this parameter, on a port-by-port basis, to forward trafﬁc to an NP. The Ethernet ports on the NP access cards remain unaffected in the current release, that is, these ports always pass IP trafﬁc to the NP.

For detailed information about conﬁguring Ethernet port attributes, see the LightStream 2020 Conﬁguration Guide. For detailed information about IP addresses, subnet masks, and network classes, see the LightStream 2020 Site Planning and Cabling Guide.

For each trunk port that you conﬁgure, the following information is required:

•

The trunk card type: low speed (T1/E1 rate), T3, E3, or OC-3c

The number of the chassis slot in which the trunk card is located

The port number (except on an OC-3c card, which has only one trunk port)

•Additional port information needed varies, depending on the type of port being conﬁgured, as indicated below:

—For a low-speed trunk port, specify the DTE/DCE type and DTE or the DCE bit rates.

—For a T3 trunk port, specify the line type (C-bit parity or clear channel), the cable length

(0 – 450 feet or 450 – 900 feet), and the cell payload scrambling mode (enabled or disabled).

—For an E3 trunk port, specify the cable length (0 – 400 feet, 300 – 1000 feet, 800 – 1300 feet, or 1100 – 1900 feet) and the cell payload scrambling mode (enabled or disabled).

—For an OC-3c trunk port, specify the clocking mode (internal or external).

2-16LightStream 2020 Installation Guide

2020 specifications

Cisco Systems, a global leader in networking and cybersecurity solutions, experienced a transformative year in 2020, marked by its commitment to innovation and adaptation in the face of unprecedented global challenges. As the COVID-19 pandemic reshaped the way businesses operated, Cisco responded by enhancing its offerings and focusing on remote work solutions, robust security measures, and the expansion of its cloud capabilities.

One of the main features of Cisco's 2020 portfolio was the enhancement of its Webex platform. With remote work becoming the norm, Cisco Webex proved invaluable for businesses and educational institutions, providing a comprehensive suite of tools for video conferencing, online collaboration, and virtual events. The platform saw significant upgrades, including enhanced security features and improvements in user experience, ensuring seamless communication in a distributed work environment.

In the realm of cybersecurity, Cisco reinforced its dedication with the launch of several new security solutions. The Cisco SecureX platform was introduced as a cloud-native security platform that integrated the company's extensive security portfolio, allowing organizations to have a unified view of their security postures. This move highlighted Cisco's focus on simplifying security management and improving incident response times, recognizing the growing need for comprehensive cybersecurity as remote work became prevalent.

Furthermore, 2020 saw advancements in Cisco's cloud strategy. The company focused on multi-cloud environments, allowing customers to manage their applications seamlessly across various platforms. The integration of technologies such as Application Centric Infrastructure (ACI) and Cisco Intersight provided improved automation, visibility, and control over network resources, essential for businesses navigating hybrid cloud setups.

Cisco also placed a strong emphasis on digital transformation, empowering organizations to transition to a more agile and responsive IT infrastructure. The company introduced innovative solutions to support enterprises in their journeys toward digital transformation, leveraging technologies such as artificial intelligence and machine learning to enhance network performance and operational efficiency.

In addition to its focus on technology and innovation, Cisco was recognized for its commitment to corporate social responsibility. The company actively engaged in initiatives aimed at bridging the digital divide, providing resources and support to underserved communities to promote access to technology and education.

Overall, 2020 was a pivotal year for Cisco Systems, characterized by resilience, innovation, and a profound understanding of the evolving needs of businesses worldwide. Through its comprehensive portfolio of solutions, Cisco not only adapted to the changing landscape but also paved the way for a more connected and secure future.