-C H A P T E R

C H A P T E R 3

Server Description

The Netra CT servers slide into the chassis and are secured to the chassis using captive screws at the top and base of the server. Each Netra CT server is an independent computer, with its own host CPU card, midplane, I/O slots, and, in some cases, storage devices and removeable media.

Server Types

The Netra CT chassis supports two types of Netra CT server:

Netra CT 810 server

Netra CT 410 server

Note - The Netra CT chassis also supports the Netra ct 800 server and the Netra ct 400 server. For more information on those servers, refer to the documentation that you received with those servers.

Netra CT 810 Server

TABLE 3-1 gives the physical specifications for the Netra CT 810 server, and FIGURE 3-1 shows the Netra CT 810 server.


Measure	U.S.	Metric
Width	8.6 inches	217.5 mm
Depth--DC model	15 inches	378.3 mm
Depth--AC model	15.4 inches	391.3 mm
Height	20.2 inches	512.7 mm
Weight, fully-loaded	38 lbs	17.2 kg

FIGURE 3-1 Netra CT 810 Server Physical Specifications

Figure showing physical specifications for the Netra CT 810 server. Same specifications are also given in TABLE 3-1.

Netra CT 410 Server

TABLE 3-2 gives the physical specifications for the Netra CT 410 server, and FIGURE 3-2 shows the Netra CT 410 server.


Measure	English	Metric
Width	4.3 inches	108 mm
Depth--DC model	14.9 inches	378.7 mm
Depth--AC model	15.4 inches	391.7 mm
Height	20.2 inches	512.7 mm
Weight, fully-loaded	22 lbs	10 kg

FIGURE 3-2 Netra CT 410 Server Physical Specifications

Figure showing physical specifications for the Netra CT 410 server. Same specifications are also given in TABLE 3-2.

The following combinations of the two server types are supported in a Netra CT chassis:

One or two Netra CT 810 servers (FIGURE 3-3)

One to four Netra CT 410 servers (FIGURE 3-4)

One Netra CT 810 server and one or two Netra CT 410 servers (FIGURE 3-5)

FIGURE 3-3 Two Netra CT 810 Servers in a Chassis

Figure showing two Netra CT 810 servers being installed in a chassis.

FIGURE 3-4 Four Netra CT 410 Servers in a Chassis

Figure showing four Netra CT 410 servers being installed in a chassis.

FIGURE 3-5 One Netra CT 810 Server, Two Netra CT 410 Servers in a Chassis

Figure showing one Netra CT 810 server and two Netra CT 410 servers being installed in a chassis.

Determining If You Have a Netra CT 810 Server or Netra CT 410 Server

If you are not sure whether you have a Netra CT 810 server or a Netra CT 410 server, go to the front of the chassis and locate the system status panel (FIGURE 3-6).

FIGURE 3-6 System Status Panel Locations

Figure showing the location of the system status panels on the Netra CT servers.

The server identifier at the bottom right corner of the system status panel tells you if you have a Netra CT 810 server or a Netra CT 410 server (FIGURE 3-7).

Note - You can also use the server identifiers on the system status panel to determine if you have a Netra ct 800 or a Netra ct 400 server. Refer to the documentation that you received with those servers for more information.

FIGURE 3-7 Locating the Server Identifiers

Figure showing the location of the server identifiers for the Netra CT servers.

Midplanes

Each Netra CT server has a midplane. A midplane is the functional equivalent of a backplane. The CPU card, storage devices, and I/O cards all plug into the midplane from the front of the chassis, and the rear transition cards plug into the midplane from the rear. The midplane for each server is secured to the back of the server unit.

They support the 5V-V10 CompactPCI bus. Although the CPU card will only support the 32-bit CompactPCI bus, the midplanes in both Netra CT servers will allow 64-bit peer-to-peer transactions. The midplanes will also support the H.110 telephony bus on all but these slots:

Slots 1 and 8 in the Netra CT 810 server

Slots 1 and 3 in the Netra CT 410 server

Slot 1 in the Netra CT 810 server and slot 3 in the Netra CT 410 server are reserved for the host CPU card. Slot 8 in the Netra CT 810 server and slot 1 in the Netra CT 410 server are proprietary I/O slots, intended solely for alarm cards. All CompactPCI slots support basic, full and high availability hot swap on every CompactPCI slot.

FIGURE 3-8 shows the different buses on the Netra CT 810 server and FIGURE 3-9 shows the different buses on the Netra CT 410 server.

FIGURE 3-8 Buses in a Netra CT 810 Server (Front View)

Figure showing the buses in a Netra CT 810 server.

[ D ]

FIGURE 3-9 Buses in a Netra CT 410 Server (Front View)

Figure showing the buses in a Netra CT 410 server.

[ D ]

Front-Access and Rear-Access Models

Both Netra CT 410 servers and Netra CT 810 servers can be either front-access or rear-access models. A front-access model is a server that is designed so that all the cables to the CompactPCI cards are connected from the front of the chassis, and a rear-access model is designed so that all the cables to the CompactPCI cards are connected from the rear of the chassis. The front and rear-access models are mechanically different from one another. All models of servers in a chassis--whether it is a Netra CT 410 server or a Netra CT 810 server--must have the same type of cable access, all front or all rear; you cannot have both front and rear-access model servers in the same chassis.

Note - The internal wiring and mechanical layout differ greatly between the rear-access and front-access models of the Netra CT server. Because of this, you cannot change a rear-access model of a Netra CT server to a front-access model (or vice versa) after the Netra CT server and chassis have been shipped from the factory.

Front-Access Models

For the front-access model of the Netra CT 410 server, all of the CompactPCI cards installed in the servers are installed from the front of the server and the cables are connected from the front. There are no cards installed or cabling from the rear of the server, so the back of the Netra CT server chassis is closed for front-access models. FIGURE 3-10 shows the top view of the front-access model of a diskfull Netra CT 410 server, and FIGURE 3-11 shows the top view of the front-access model of a diskless Netra CT 410 server.

FIGURE 3-10 Front-Access Model of a Netra CT 410 Server, Diskfull Version (Top View)

Figure showing the acceptable cards and cabling for a front-access diskfull Netra CT 410 server.

[ D ]

FIGURE 3-11 Front-Access Model of a Netra CT 410 Server, Diskless Version (Top View)

Figure showing the acceptable cards and cabling for a front-access diskless Netra CT 410 server.

[ D ]

Rear-Access Models

For the rear-access models of both the Netra CT 810 server and the Netra CT 410 server, all the cables are connected to rear transition cards installed at the rear of the Netra CT server. The rear transition cards, in effect, extend the CompactPCI cards installed in each slot from the midplane to the rear of the chassis. The rear-panel transition cards are "in-line" with the front CompactPCI cards.

Each rear transition card installed in a rear-access model must have an accompanying card installed in the front card cage of the server; however, the type of card installed in the front card cage varies:

Host CPU card--A host CPU card must be installed in the front card cage in the appropriate slot (slot 1 in the Netra CT 810 server and slot 3 in the Netra CT 410 server). In addition, a host CPU rear transition card must be installed in the rear card cage in the same slot, viewed from the rear. The host CPU rear transition card provides connections from the host CPU card to standard I/O connectors at the rear of the system.

I/O card or satellite CPU card--A front I/O card or satellite CPU card must be installed in the front card cage in one of the I/O slots. It contains the hot swap LED that tells you when an I/O card or satellite CPU card is ready for removal. In addition, the accompanying rear transition card must be installed in the rear card cage in the same slot, viewed from the rear. The rear transition card provides connections from the front I/O card or satellite CPU card to standard connectors at the rear of the system.

Alarm card--An alarm card must be installed in the front card cage in the appropriate slot (slot 8 in the Netra CT 810 server and slot 1 in the Netra CT 410 server). In addition, an alarm rear transition card must be installed in the rear card cage in the same slot, viewed from the rear. The alarm card installed in the front card cage is the same alarm card installed in a front-access model; however, when a Netra CT server system detects an alarm rear transition card, it automatically reroutes the signals directly to the alarm rear transition card, so cabling is done to the alarm rear transition card, not the alarm card installed in the front card cage.

FIGURE 3-12 shows the top view of the rear-access model of a Netra CT 810 server with an alarm card installed, and FIGURE 3-13 shows the top view of the rear-access model of a Netra CT 410 server.

FIGURE 3-12 Rear-Access Model of an Netra CT 810 Server (Top View)

Figure showing the acceptable cards and cabling for a rear-access Netra CT 810 server.

[ D ]

FIGURE 3-13 Rear-Access Model of a Netra CT 410 Server, Diskfull Version (Top View)

Figure showing the acceptable cards and cabling for a rear-access diskfull Netra CT 410 server.

[ D ]

FIGURE 3-14 Rear-Access Model of a Netra CT 410 Server, Diskless Version (Top View)

Figure showing the acceptable cards and cabling for a rear-access diskless Netra CT 410 server.

[ D ]

The slot to the left of the power supply in the Netra CT 410 server is reserved for the host CPU front transition card (FTC). The host CPU front transition card is not needed for the rear-access model of the Netra CT 410 server, so a host CPU front termination board is installed in this slot for the rear-access model (see Host CPU Front Termination Board (Netra CT 410 Server Only) for more information).

Determining If You Have a Front-Access or Rear-Access Model

If you are not sure whether you have a front-access or a rear-access model, go to the front of the chassis and look at the top part of the chassis.

If you see the DC connectors at the front of the chassis, then you have a front-access model (FIGURE 3-15).

If you do not see DC connectors at the front of the chassis, and metal filler plates fill the gaps where the DC connectors would normally be, then you have a rear-access model (FIGURE 3-15). The DC connectors are at the rear of the chassis for the rear-access model.

Note - AC-powered servers are only available in rear-access models.

FIGURE 3-15 Front-Access and Rear-Access Models

Figure showing the DC connectors on the front-access model of the chassis or the filler panels on the rear-access model of the chassis.