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A network administrator can use the Cisco Ethernet Subscriber Solution Engine (Cisco ESSE) to configure and manage Cisco Optical Network Terminator (ONT) 1031 units, which provide optical fiber-based Ethernet connectivity to homes and small offices. The Cisco ESSE is a rack-mountable appliance with a web browser GUI.
The Cisco ESSE and the Cisco ONT 1031 are described in greater detail in the following sections:
The Cisco ONT 1031 mounts on the exterior of the building it serves and is environmentally sealed to withstand a wide variety of climates. There is no console port, and all configuration of the unit is performed in-band from a central management point by an administrator using the Cisco ESSE.
The Cisco ONT 1031 is a media rate convertor. It converts the fiber-optic Gigabit Ethernet uplink with the central office or "curb furniture" (1000BASE-LX) to a Gigabit over Category 5 copper cable to the subscriber (10/100/1000BASE-T) inside the home or small office. The network provider can configure the connection for slower link speeds, 10BASE-T or 100BASE-TX, or configure the devices to autonegotiate the connection. Network administrators may manage the Cisco ONT 1031 using the Cisco ESSE, which communicates with the Cisco ONT 1031 units through a Layer 2 in-band communication protocol called L2NMP.
All packets received by the subscriber port are forwarded to the uplink port, and all non-management packets received by the uplink port are sent out the subscriber port. In both of these cases, the receiving MAC stores the packet in the packet buffer until the other MAC fetches the packet and transmits it out its port.
The Cisco ONT 1031 provides the following:
Table 1-1 outlines the technical specifications of the Cisco ONT 1031 and its power supply:
| Ports | ||
LC | One dual LC connector for connection to a single Gigabit Ethernet 1000BASE-LX port | |
RJ-45 | One RJ-45 connector for connection to one 10/100/1000BASE-T Ethernet port | |
| Power | ||
AC power supply wattage | AC input power DC output power | 3W 20W |
AC power supply voltage | Nominal DC output Nominal AC input | 12V @ 1.674 100-120VAC or 200-240VAC at 50-60 Hz |
| Power Environmental | ||
Operating temperature | 32°-104°F (0°-40°C) | |
Storage temperatures | -35°-149°F (-65°-65°C) | |
Operating altitude | 0-6500 ft. (0-2000 m) | |
| Physical | ||
Height | 6.5 in. (16.5 cm) | |
Width | 3.5 in. (8.9 cm) | |
Depth | 6.5 in. (16.5 cm) | |
Gasket Size | 0.125 in. | |
| Environmental | ||
Operating temperature | -40°-122°F (-40°-50°C) | |
Operating altitude | -50-6500 ft. (-16-2000 m) | |
Storage altitude | -50-35,000 ft. (-16- 10,600 m) | |
The Cisco ONT 1031 complies with the standards listed in Table 1-2:
| Item | Description |
|---|---|
Regulatory compliance | 89/366/EEC, 73/23/EEC |
Safety | UL 60950 CAN/CSA-C22.2 No. 60950-00 EN 60950 IEC 60950 TS 001 AS/NZS 3260 IEC 60825-2 EN 60825-2 21 CFR 1040 |
EMC | FCC Part 15 (CFR 47) Class B ICES-003 Class B EN55022 Class B CISPR22 Class B AS/NZS 3548 Class B VCCI Class B EN55024 EN50082-1 EN61000-3-2 EN61000-3-3 |
The Cisco ESSE provides remote configuration, management, and diagnostics for a network of up to 2000 Cisco ONT 1031 units. It uses the Layer 2 network management protocol (L2NMP), to discover and communicate with the Cisco ONT 1031 units. The Cisco ESSE must have a Layer 2 connection to all devices it manages.
The Cisco ESSE ships on a Cisco workstation appliance, with all required software preloaded. The installer must configure the IP parameters for the server using a CLI interface as described in the Cisco Ethernet Subscriber Solution Engine Installation and Setup Guide. Software upgrades will be available for download from CCO and are also sent via CD-ROM as they become available.
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Note If the network connectivity of multiple Cisco ONT 1031 units is configured on multiple VLANs, the Cisco ESSE workstation must connect to a switch port with IEEE 802.1q trunking configured. Refer to Chapter 2 of the Cisco Ethernet Subscriber Solution Engine Installation and Setup Guide, in the Setting Up the Layer 2 Network section. |
Figure 1-1 shows a sample Cisco ESSE managed network.
When Cisco ONT 1031 devices are first powered on, they start sending multicast notifications every 15 sec. to the Cisco ESSE Ethernet1 interface. When the Cisco ESSE receives a notification, it goes through a handshake negotiation with the Cisco ONT 1031 that sent the notification and adds the Cisco ONT 1031 to the list of reachable devices. After the handshake negotiation is complete, the Cisco ONT 1031 does not send any more notifications until one of the following happens:
The Cisco ONT 1031 provides subscriber connectivity as soon as the device is installed, based on default settings. The discovery process and device configuration using Cisco ESSE are not required for a functioning subscriber connection.
Cisco ONT 1031 devices that have gone through the initial discovery process and have contacted the Cisco ESSE within the last 15 minutes are considered reachable devices. Cisco ONT 1031 devices that have gone through the initial discovery process and have not contacted the Cisco ESSE within the last 15 minutes are considered unreachable devices.
Each Cisco ONT 1031 keeps track of the time of its last contact with the Cisco ESSE. If the Cisco ESSE has not contacted the device in more than 15 minutes, the Cisco ONT 1031 continues to carry subscriber traffic while sending notifications (every 15 sec.) out its network interface in an attempt to be discovered by the Cisco ESSE.
For instance, if the user deletes a particular device from the Reachable Devices list, but the device is still powered on and plugged into the network, the deleted device will be rediscovered via this process within 15 min.
You can initiate a manual Rediscovery operation. The Rediscovery operation causes the Cisco ESSE to issue a single Cisco ONT 1031 multicast notification to each known VLAN in the Layer 2 network (refer back to Figure 1-1). The Cisco ESSE keeps a list of all devices and VLANs. As each Cisco ONT 1031 in these VLANs receives the notification, it starts issuing Cisco ESSE multicast notifications from the network interface, leading to the same process as first-time discovery.
The Rediscover operation also causes all devices in the Reachable Devices list to be moved to the Unreachable Devices list. The Reachable Devices list is then empty, and all known devices are now in the Unreachable Devices list. As Cisco ONT 1031 devices get rediscovered, they are moved to the Reachable Devices list. To see updated entries in either of the device lists, click the Refresh button.
Statistics are automatically collected every 15 minutes from each reachable device and stored locally by the Cisco ESSE. The locally stored statistics information for each device are displayed each time the statistics display screen is loaded on the web browser. You may also request a snapshot of the most recent statistics directly from the device; these, too, will be stored on disk and further updated at the next 15-minute collection cycle.
A Cisco ONT 1031 is considered unreachable when a request is sent and no response is received within 10 sec. and the number of retries is exceeded. Statistics are not collected from unreachable devices.
After a 15-minute period with no messages, the Cisco ONT 1031 again starts sending multicast notifications out its network interface in an attempt to connect to a Cisco ESSE. Once a notification is received at the Cisco ESSE, the device is considered reachable.
The Cisco ESSE allows a network administrator to change the Cisco ONT 1031 device from normal loopback mode to PHY loopback mode. Normal loopback mode allows live in-stream internal loopback diagnostic tests. PHY loopback mode allows for physical loopback diagnostic tests that occur at the Cisco ONT 1031's physical interface and causes disruption of live user data stream until normal loopback mode is restored. A user can also determine the status of a link and of a device by using L2NMP echo packets sent between the Cisco ESSE and a Cisco ONT 1031.
The Cisco ESSE provides a web-based GUI supporting Netscape 4.78 and Internet Explorer 5.5 SP2 web browsers on Windows 2000 and Netscape 4.78 only on Solaris 8, and Linux 6.2. The Cisco ESSE does not require any special software on the client systems. The first release supports 10 concurrent users. Cisco recommends a 1024 x 768 screen resolution on the management workstation running the browser.
You are authenticated using a username and password when you log in to the system. You can view and modify the configuration of the network and set the devices in loopback.
There is no locking between two users when both modify the configuration of the same device. The configuration changes are atomic operations. The changes to a device configuration by multiple users are not interleaved by the Cisco ESSE.
The Cisco ESSE logs the following information about connections to its GUI:
You can view these log messages from the Cisco ESSE GUI.
Application configuration and statistics data are stored locally. Backup and restore procedures are described in "Administration."
If the Cisco ESSE fails, the administrator can replace it with a new one and restore the data from the backup information.
If the backup information is not available, the new Cisco ESSE can automatically resynchronize with the network.
Cisco ESSE security consists of login/password screening, inactivity timeouts, and support for Secure HTTP (HTTPS), implemented in the following ways:
Cisco ESSE administrator tasks like creating user accounts and passwords are described in the Cisco Ethernet Subscriber Solution Engine Installation and Setup Guide.
When the GUI is left inactive for 30 minutes, the web session is suspended. This suspension can lead to a Java error message displayed in the browser. If this happens, click the Logout button (or the browser Refresh button) to return to the Login screen. Then log in again.
Posted: Wed Sep 4 22:05:59 PDT 2002
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