IBM 8271 Ethernet switch with 155MB/s uplink

8271 front
The IBM 8271 seems to be a badged 3com switch which has a slot in the rear for an ATM 155MB/s uplink. There is also a 100MB/s fibre ethernet module available.

8271 rear showing 155MB/s fibre uplink

In this pic, the last four ports are set to one vlan not mapped to ATM, but ports 1 to 8 are mapped to different ELANS.

Overview

Access is by a serial port set to 9600 8N1 without flow control, or telnet once an ipaddress is set. Each ethernet port can be assigned to a vlan, and there can be 12 LEC instances running with it's own ELAN name, these instances can be set to participate in a ethernet VLAN, thereby bridging the ethernet to an ATM ELAN.

The ATM fibre uplink is a UNI port. 3.0 and 3.1 is supported. The only mode supported is LAN Emulation, PVCs are not supported.

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x                           IBM 8271 Nways Switch                              x
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x      888   2222  77777  1       N    N  W     W   AAA   Y    Y   SSSS        x
x     8   8      2    7   1       N N  N  W  W  W  A   A  Y    Y  S            x
x      888    222    7    1       N  N N  W  W  W  AAAAA   YYYYY   SSS         x
x     8   8  2      7     1       N   NN  W W W W  A   A       Y      S        x
x      888   2222  7      1       N    N  W     W  A   A   YYYYY  SSSS         x
x                                                                              x
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x                          BMH 8271                                            x
x                                                                              x
x                                                                              x
x                                                                              x
x                          Press Enter to Continue ...                         x
x                                    OK                                        x
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Config

Initial screen:-

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x                       IBM 8271 Nways Switch Main Menu                        x
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x                                                                              x
x                                                                              x
x                                                                              x
x                          SWITCH MANAGEMENT                                   x
x                          USER ACCESS LEVELS                                  x
x                          STATUS                                              x
x                          MANAGEMENT SETUP                                    x
x                          SOFTWARE UPGRADE                                    x
x                          INITIALIZE                                          x
x                          RESET                                               x
x                          REMOTE POLL                                         x
x                          ATM CONFIGURATION                                   x
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x                          LOGOFF                                              x
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ATM config initial screen:-

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x               IBM 8271 Nways Switch ATM Module Configuration                 x
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x                                                                              x
x    Changing the configuration displayed on this screen will cause the        x
x    device to be reset and may result in a loss of communication. Please      x
x    refer to the manual before editing any of the fields on this screen.      x
x                                                                              x
x    ATM Mode:           LAN Emulation Version 1                               x
x    Signalling:         `uni3.1   `                                           x
x    SONET/SDH:          `SONET STS-3c   `                                     x
x    Max VPI Bits(0-4):  [3 ]                                                  x
x    Max VCI Bits:        8                                                    x
x    ILMI VCC:           [0 ]  [16  ]                                          x
x                                                                              x
x    ATM Module Version Information:                                           x
x      Hardware Version:               1.00                                    x
x      Upgradable Software Version:    1.08                                    x
x      Boot Software Version:          1.00                                    x
x                                                                              x
x                  OK           ATM LEC SETUP            CANCEL                x
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x                                                                              x
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ATM Lan Emulation Client setup:-

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x                     IBM 8271 Nways Switch ATM LEC Setup                      x
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x                                                                              x
x    Select APPLY after configuring the LEC parameters for each VLAN.          x
x    Selecting another VLAN will discard any edits that have not been          x
x    saved using APPLY                                                         x
x                                                                              x
x    Select the VLAN to be configured:                              [1 ]       x
x                                                                              x
x    Is this VLAN to be connected to an ELAN?                      `Yes`       x
x                                                                              x
x    Is the LES Address to be entered manually                                 x
x    or obtained from the LECS?                                 `LECS  `       x
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x    Enter the name of the ELAN                                                x
x    that this VLAN is to join:      [BMH_MAIN                         ]       x
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x                       APPLY               CANCEL                             x
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VLAN config and mapping to ELANS

Idea is to map an ELAN to a VLAN, and then set a physical port to be a member of the required VLAN. This puts each port on the front to a different ATM ELAN.

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x                      IBM 8271 Nways Switch Management                        x
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x                  Management Level:       `VLAN`                              x
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x              SERVER                                  SETUP   CANCEL          x
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Go to Setup for VLAN membership:-

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x                      IBM 8271 Nways Switch VLAN Setup                        x
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x                                                                              x
x           Port   Type       VLAN Membership                                  x
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x         x   1              1                                       x         x
x         x   2                2                                     x         x
x         x   3                  3                                   x         x
x         x   4                    4                                 x         x
x         x   5                      5                               x         x
x         x   6                        6                             x         x
x         x   7                          7                           x         x
x         x   8                            8                         x         x
x         x   9                              9                       x         x
x         x  10                              9                       x         x
x         mqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqj         x
x                                                                              x
x           Port ID:   1      VLAN ID: [1 ]                                    x
x                                                                              x
x         APPLY                                               CANCEL           x
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rb/ibm8271.txt · Last modified: 30/03/2018 12:26 by andrew