IBM 8270, Инструкция по установке и обслуживанию

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The Master Address Table displays the address for Domain 0 (default). In the
example given, the address for the 8270 is the
Switch Base MAC Address ( 00044A
281320 ) on the Switch Information panel. The address that is loaded for Domain 0
in the BOOTPTAB file is
00044A 281340
. If another 8270 is configured, the address
associated with that 8270 is entered in the BOOTPTAB file in the BootP server
associated with that 8270. (In this example, the second 8270 has the Domain 0
address
10005A 2B12A0 which corresponds to switch base address 10005A 2B1280 )
If the 8270 has domains configured, a BootP server is attached to each configured
domain. The BOOTPTAB file contains the address for that specific domain.
Note: BootP has a limitation with respect to the gateway entry. The server device
IP address is written into the “gw” gateway address filed when the configuration is
downloaded. Thus, you must configure the gateway address on the 8270 at the
end of the download sequence. Refer to your UNIX operating system environment
manual for further information.
BootP and TFTP Limitations
¹
Do not configure multiple TFTP servers to download code updates using TFTP
to a single 8270 (or to multiple domains).
¹
When you use domains, BootP configures the IP address of the
BootP-connected network.
¹
The IBM BootP implementation does not need or handle any BootP extensions.
¹
If the download is interrupted or corrupted, you must download a new image
using the serial port download (see “Serial Port or TFTP Downloading with the
Download Menu” on page 4-3).
¹
If the network broadcast traffic is 200 packets per second or more, the TFTP
request might not be initiated by the 8270. You must reset the 8270 and
download a new image using the serial port download (see “Serial Port or
TFTP Downloading with the Download Menu” on page 4-3).
¹
The BootP function might not work if BootP request and reply frames must
cross Token-Ring segments.
Error Messages
During the BootP download procedure, the 8270 might encounter certain error
conditions. When this occurs, the 8270 sends error messages to the console.
4-8
8270 Nways LAN Switch Models 600 and 800