Driver Installation Requirements

3-3

Memory Requirement Scenario 1

There are two NICs installed. One has a maximum frame size of 1514 bytes and four ELANs, and the other is a standby NIC. The memory requirement is 24 megabytes of RAM.

Frame_Size = 1 (1514 bytes maximum frame size)

No. of NICs = 2 (two NICs are installed in the computer)

No. of ELANs = 4 (only one NIC has ELANs configured)

(16 1) + [(2 – 1) (4)] = 20

The closest integral multiple of 8 greater than 20 is 24.

Memory Requirement Scenario 2

There are three NICs installed. One is a token ring LAN type with a maximum frame size of 4542 and four ELANs, one is a token ring LAN type with a maximum frame size of 9232 and two ELANs, and one is an Ethernet LAN type with a maximum frame size of 1514 and six ELANs. The memory requirement is 80 megabytes of RAM.

Frame_Size = 4 (use the largest value of all present) No. of NICs = 3 (three NICs are installed in the computer)

No. of ELANs = 6 (the maximum number of ELANs on any one NIC)

(16 4) + [(3 – 1) (6)] = 76

The closest integral multiple of 8 greater than 76 is 80.

Software Requirements

ATMDisk diskette for Windows NT

3Com strongly recommends that your Windows NT operating system be updated with the most recent service packs available from Microsoft technical support (www.microsoft.com).

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3Com 155 PCI manual Software Requirements, Memory Requirement Scenario, ATMDisk diskette for Windows NT