Networking

Introduction

To configure CHARON-VAX / CHARON-PDP networking, follow these 3 steps:

Load network adapter (if required)
If you are configuring a DEQNA, DESQA, DELQA, DEUNA, DELUA, DEMNA, DEBNI or PMADAA adapter, use the "load" command as shown below. CHARON-VAX 3100/96/98 and 4000/106/108 emulations automatically load SGEC (with the name "EZA") and therefore no "load" command is required.

Example:
load DELQA/DEQNA NIC
Load "packet_port"
Load "packet_port" to connect the SGEC, DEQNA, DESQA, DELQA, DEUNA, DELUA, DEMNA, DEBNI or PMADAA adapter to the host hardware network card (or to a virtual network interface).
Example:
load packet_port/chnetwrk NDIS interface = "connection:Charon"
Connect the loaded "packet_port" to the loaded virtual network adapter
Connect the SGEC, DEQNA, DESQA, DELQA, DEUNA, DELUA, DEMNA, DEBNI or PMADAA adapter to the "packet_port" by setting the interface name.

Example:
set NIC interface = NDIS

SGEC Ethernet Controller

The built-in SGEC controller emulator ("EZA") has the following parameters that are specified with the "set" command:

interface

Parameter	interface
Type	Text String
Value	Name of the corresponding instance of the "packet_port" component

station_address

Parameter station_address

Type

Text String

Value

The "station_address" provides the ability to configure the adapter’s permanent address. By default the adapter’s permanent address is read from the host system’s NIC.

Set the "station_address" when you need to configure a satellite (remotely booted) system that will run DECnet or when the migrated software uses the permanent address on the network adapter.

Format:

XX-XX-XX-XX-XX-XX

or

XX:XX:XX:XX:XX:XX

Example:

set eza station_address="AF:01:AC:78:1B:CC"

rx_fifo_size

Parameter

rx_fifo_size

Type

Numeric

Value

"rx_fifo_size" sets the receive FIFO size.

The value is specified in Kb and, by default, is pre-calculated from the connected port’s size of the receive queue.

Typically, you do not need to change the "rx_fifo_size" parameter. It is available for extended tuning and debugging purposes.

Example:

load packet_port/chnetwrk EZA0 interface = "connection:Charon"

set EZA interface = EZA0

set EZA station_address="0C:FE:35:AA:67:3B"

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DEQNA / DESQA / DELQA Ethernet Controller

CHARON-VAX / CHARON-PDP Q-bus systems provide support for DEQNA, DESQA, DELQA, DEUNA and DELUA Ethernet controllers.

Use the following command to load the instances of DEQNA, DESQA, DELQA, DEUNA or DELUA Ethernet controllers:

load DEQNA/DEQNA <logical name>
load DESQA/DEQNA <logical name>
load DELQA/DEQNA <logical name>
load DEUNA/DEUNA <logical name>
load DELUA/DEULA <logical name>

Example:

load DESQA/DEQNA XQA

DEQNA, DESQA, DELQA, DEUNA and DELUA offer the following configuration parameters that can be specified using the "set" command:

address

Parameter address

Type

Numeric

Value

Specifies the CSR address. The address must be a valid QBUS and UNIBUS address in I/O space. Initial value is 017774440, which is the factory setting for DEQNA, DESQA and DELQA Ethernet controllers.

Use the address parameter if loading several instances of DEQNA, DESQA, DELQA, DEUNA and DELUA Ethernet controllers.

"address" parameter values must be unique for every instance of an DEQNA, DESQA, DELQA, DEUNA and DELUA Ethernet controller.

Example:

load DEQNA/DEQNA XQA address=017774440
load DEQNA/DEQNA XQB address=017764460

interface

Parameter	interface
Type	Text String
Value	Name of the corresponding instance of the "packet_port" component

station_address

Parameter station_address

Type

Text String

Value

"station_address" provides the ability to configure the adapter’s permanent address. By default the adapter’s permanent address is read from the host system’s NIC.

Set the "station_address" when you need to configure a satellite (remotely booted) system that will run DECnet or when the migrated software uses the permanent address on the network adapter.

Format:

XX-XX-XX-XX-XX-XX

or

XX:XX:XX:XX:XX:XX

Example:

set QNA station_address="AF:01:AC:78:1B:CC"

rx_fifo_size

Parameter

rx_fifo_size

Type

Numeric

Value

"rx_fifo_size" sets the receive FIFO size.

The value is specified in Kb and by default is pre-calculated from the connected port’s size of the receive queue.

Typically, you do not need to change the "rx_fifo_size" parameter. It is available for extended tuning and debugging purposes.

Example:

load DESQA/DEQNA QNA interface = QNA0

set QNA station_address="0C:FE:35:AA:67:3B"

load packet_port/chnetwrk QNA0 interface = "connection:Charon"

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DEMNA Ethernet Adapter

CHARON-VAX/66X0 systems provide support for the DEMNA Ethernet controller.

Use the following command to load an instance of the DEMNA Ethernet controller:

load DEMNA/DEMNA <logical name>

Example:

load DEMNA/DEMNA EXA

DEMNA Ethernet controllers offer the following configuration parameters that can be specified using the "set" command:

xmi_node_id

Parameter

xmi_node_id

Type

Number

Value

Specifies the XMI slot in which the virtual DEMNA controller is placed.

For CHARON-VAX/66X0 a free slot between 10 (A) and 14 (E) must be chosen.

interface

Parameter	interface
Type	Text String
Value	Name of the corresponding instance of the "packet_port" component

station_address

Parameter station_address

Type

Text String

Value

The "station_address" provides the ability to configure the adapter’s permanent address. By default the adapter’s permanent address is read from the host system’s NIC.

Set the "station_address" when you need to configure a satellite (remotely booted) system which will run DECnet or when the migrated software uses the permanent address on the network adapter.

Format:

XX-XX-XX-XX-XX-XX

or

XX:XX:XX:XX:XX:XX

Example:

set EXA station_address="AF:01:AC:78:1B:CC"

rx_fifo_size

Parameter

rx_fifo_size

Type

Numeric

Value

The "rx_fifo_size" sets the receive FIFO size.

The value is specified in Kb and, by default, is pre-calculated from the connected port’s size of the receive queue.

Typically, you do not need to change the "rx_fifo_size" parameter. It is available for extended tuning and debugging purposes.

Example:

load DEMNA/DEMNA EXA xmi_node_id = 11 interface = EXA0

set EXA station_address = "0C:FE:35:AA:67:3B"

load packet_port/chnetwrk EXA0 interface = "connection:Charon"

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DEBNI Ethernet Adapter

CHARON-VAX/63X0 systems provide support for the DEBNI Ethernet controller.

Use the following command to load an instance of the DEBNI Ethernet controller:

load DEBNI/DEMNA <logical name>

Example:

load DEBNI/DEMNA EXA

DEBNI Ethernet controllers offer the following configuration parameters that can be specified using the "set" command:

vax_bi_node_id

Parameter	vax_bi_node_id
Type	Number
Value	Specifies the VAXBI slot in which the virtual DEBNI controller is placed.

interface

Parameter	interface
Type	Text String
Value	Name of the corresponding instance of the "packet_port" component

station_address

Parameter station_address

Type

Text String

Value

The "station_address" provides the ability to configure the adapter’s permanent address. By default the adapter’s permanent address is read from the host system’s NIC.

Set the "station_address" when you need to configure a satellite (remotely booted) system which will run DECnet or when the migrated software uses the permanent address on the network adapter.

Format:

XX-XX-XX-XX-XX-XX

or

XX:XX:XX:XX:XX:XX

Example:

set EXA station_address="AF:01:AC:78:1B:CC"

rx_fifo_size

Parameter

rx_fifo_size

Type

Numeric

Value

The "rx_fifo_size" sets the receive FIFO size.

The value is specified in Kb and, by default, is pre-calculated from the connected port’s size of the receive queue.

Typically, you do not need to change the "rx_fifo_size" parameter. It is available for extended tuning and debugging purposes.

Example:

load DEBNI/DEMNA EXA vax_bi_node_id = 11 interface = EXA0

set EXA station_address = "0C:FE:35:AA:67:3B"

load packet_port/chnetwrk EXA0 interface = "connection:Charon"

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PMAD-AA TurboChannel Ethernet Adapter

The CHARON-VAX VAXstation 4000 Model 90 system provides support for a PMAD-AA TurboChannel Ethernet controller (in addition to the preloaded SGEC "EZA").

Use the following command to load an instance of a PMAD-AA Ethernet controller:

load PMADAA/PMADAA <logical name>

Example:

load PMADAA/PMADAA EXA

PMAD-AA TurboChannel Ethernet controllers use the following configuration parameters that can be specified using the "set" command:

interface

Parameter	interface
Type	Text String
Value	Name of the corresponding instance of the "packet_port" component

station_address

Parameter station_address

Type

Text String

Value

The "station_address" provides the ability to configure the adapter’s permanent address. By default the adapter’s permanent address is read from the host system’s NIC.

Set the "station_address" when you need to configure a satellite (remotely booted) system which will run DECnet or when the migrated software uses the permanent address on the network adapter.

Format:

XX-XX-XX-XX-XX-XX

or

XX:XX:XX:XX:XX:XX

Example:

set ECA station_address="AF:01:AC:78:1B:CC"

rx_fifo_size

Parameter

rx_fifo_size

Type

Numeric

Value

The "rx_fifo_size" sets the receive FIFO size.

The value is specified in Kb and by default is pre-calculated from the connected port’s size of receive queue.

Typically, you do not need to change the "rx_fifo_size" parameter. It is available for extended tuning and debugging purposes.

Example:

load PMADAA/PMADAA ECA interface = ECA0

set ECA station_address = "0C:FE:35:AA:67:3B"

load packet_port/chnetwrk ECA0 interface = "connection:Charon"

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Packet Port

The CHARON-specific "packet_port" interface establishes a connection between an Ethernet adapter in the Windows host system and a network adapter in the virtual VAX/PDP11 system.

For every virtual adapter instance loaded, one dedicated host Ethernet physical adapter is required.

To create instances of the "packet_port", use the “load” command in the configuration file as follows:

load packet_port/chnetwrk <instance-name>

Example:

load packet_port/chnetwrk pp_1

"packet_port" uses several configuration parameters to control its behavior.

interface

Parameter interface

Type

Text string

Value

This parameter identifies an Ethernet adapter of the host system dedicated to CHARON-VAX / CHARON-PDP with a keyword "connection" preceeding it.

Syntax:

set <name> interface="connection:<adapter>"

Example:

set pp_1 interface="connection:Charon"

port_enable_mac_addr_change

Parameter

port_enable_mac_addr_change

Type Boolean

Value

If "true" is specified (default value), CHARON sets the appropriate Ethernet address automatically.

If "false" is specified, set the Ethernet address manually.

Example:

set pp_1 port_enable_mac_addr_change=false

port_retry_on_tx

Parameter

port_retry_on_tx

Type

Numeric

Value

The "port_retry_on_tx" parameter controls the number of times a port will attempt to transmit a packet before giving up.

By default, the value is 3.

Increasing this value may introduce problems in carrier loss logic, because not all NIC drivers support a carrier status query.

Typically, you do not need to increase the value.

Example:

set pp_1 port_retry_on_tx=8

port_pending_rx_number

Parameter

port_pending_rx_number

Type

Numeric

Value

The "port_pending_rx_number" parameter sets the number of pending receive buffers.

The default value is 63. The maximum value allowed is 195.

You may want to increase the "port_pending_rx_number" when you have very busy networking and experience problems like losing connections not related to the carrier loss.

Typically, you do not need to change this parameter.

Example:

set pp_1 port_pending_rx_number=128

port_pending_tx_number

Parameter

port_pending_tx_number

Type Numeric

Value

The "port_pending_tx_number" parameter sets the number of buffers the port uses to transmit.

The default value is 62.

You may want to increase the "port_pending_tx_number" value if the log file indicates dropped TX packets due to TX queue overflow.

Typically, you do not need to change this parameter.

Example:

set pp_1 port_pending_tx_number=128

suspend_msg_on_mac_change

Parameter

suspend_msg_on_mac_change

Type

Boolean

Value

To avoid confusion arising from non critical errors during a MAC address change, logging is by default suppressed (default value is "true").

To enable tracing during a MAC address change set this parameter to "false"

Example:

set pp_1 suspend_msg_on_mac_change=false

legacy_mode

Parameter legacy_mode

Type Boolean

Value

If this parameter is set to "true" CHARON-VAX tries to use very first implementation of "packet_port" having certain restrictions such as inability to automatically change MAC address on given interface etc.

This setting may be needed if CHARON-VAX runs in VMware environment for example and you do not want to allow promiscuous mode.

In other situations please do not change its default value ("false").

Example:

set pp_1 legacy_mode=true

This parameter is required only if you do not want to allow promiscuous traffic for the VMware adapter/port. In this mode, CHARON-VAX uses legacy MAC address change logic, so use of this option is not desirable.

Thus for ESXi networking configuration:

Create the port with e1000 adapter;
Enable the promiscuous traffic;
Do not use legacy_mode option in Charon's configuration file

Example:

load DEQNA/DEQNA XQA

load packet_port/chnetwrk XQA0 interface="connection:Charon"

set XQA interface=XQA0

CHARON supports VLAN adapters. If for some reasons you are going to use them, proceed with their installation and configuration according to the network adapter's vendor's User's Guide and then use the resulting VLAN interface the same way as the regular network interface.

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Supported Ethernet Q-bus Adapters for DECnet OSI (DECnet Plus)

The only supported Q-bus device is the DELQA adapter model.

During DECnet OSI installation or DECnet OSI interface reconfiguration, DEQNA and DESQA models are not recognized as valid devices. (DECnet OSI SPD).

The integrated SGEC Ethernet "EZA" on a MicroVAX 3100 & VAX 4000-106/108 is supported by DECnet OSI.

The integrated ESA (AMD Lance 7990) device is not currently implemented in CHARON-VAX.

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Ethernet Q-bus Adapter and Cluster configuration rules

In a VMS Cluster using VMS version 5.5 and above, use only DELQA and DESQA Ethernet adapters that are supported (VMS Cluster SPD).

The default DEQNA device is not supported for SCS Cluster protocol and the emulated VAX will fail with a CLUEXIT Bugcheck.

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