Plug and Play Default Settings

The DIGITAL VNswitch family of modules features plug and play operation. Once installed, the module begins handling network traffic running transparent bridging on each port, by default. This section lists the default settings that are used when the switch is first installed. You may need to alter the default settings to maximize network performance, to enable special functions such as Virtual Local Area Networks (VLANs), and to set IP addresses for remote management.

 

Switch-Wide Default Settings

These default settings are for parameters that affect switch-wide operations.

Setting

Default

Enabling and disabling ID and password prompts

Disabled.

Inactivity timer

0 (zero) - Turns off the inactivity timer, so that an established session remains active no matter how long a console is inactive. The inactivity timer affects only those consoles linked to modules on which ID and password prompting is enabled.

Hostname

No host name.

Time zone offset

0 (zero) - Indicates no offset from GMT.

Time host synchronization frequency

0 (zero) - Indicates the switch is not to poll the time host to synchronize clocks.

Routing

Disabled.

 

Nonspecific Interface Default Settings

These default settings are common to all interface types (Ethernet, Fast Ethernet, FDDI, and ATM).

Setting

Default

Enabling and disabling an interface

Enabled

ARP Refresh Timer

20 minutes

ARP Auto-Refresh

Disabled

 

Ethernet Interface Default Settings

These default settings are for all Ethernet interface configurations.

Setting

Default

Full-duplex or half-duplex mode

Half (half-duplex mode)

Redirecting interface 11 to an AUI port

Front

 

Fast Ethernet Interface Default Settings

These default settings are for all Fast Ethernet interface configurations.

Setting

Default

Auto-negotiation (enabled or disabled)

Enabled (supported only on 100BaseTX MMI PHY cards)

Setting advertised connection capabilities

100BaseTX/full-duplex mode enabled 100BaseTX/half-duplex mode enabled 10BaseT/full-duplex mode enabled

10BaseT/half-duplex mode enabled

Full-duplex or half-duplex

Half (half-duplex mode)

 

FDDI Interface Default Settings

These default settings are for all FDDI interface configurations.

Setting

Default

Station type (DAS or SAC)

DAS

Link Error Rate Cutoff

8 (0.00000001 bits per second)

Link Error Rate Alarm

8 (0.00000001 bits per second)

Status Report Policy (SMT notification)

On

Maximum Token Rotation Time (t-max-lower-bound)

167 milliseconds

Note:  The software rounds the specified value to the nearest multiple of 5.24288 milliseconds. For example, the default value of 167 milliseconds is interpreted by the software as 167.77216 milliseconds.

Requested Token Rotation Time (t_req)

8 milliseconds

Note:  The software rounds the specified value to the nearest multiple of 20.48 microseconds. For example, the default value of 8 milliseconds is interpreted by the software as 7.9872 milliseconds.

Valid Transmission Time (tvx-timer)

2.5 milliseconds

Note: The software rounds the specified value to the nearest multiple of 20.48 microseconds. For example, the default value of 2.5 milliseconds is interpreted by the software as 2.51904 milliseconds.

Ring purger

Off

Full-duplex (or half-duplex mode)

On (Full-duplex mode)

 

ATM Interface Default Settings

The following tables list the default settings for all ATM interface configurations.

Following are the types of ATM logical interfaces (ELAN or Bridge Tunnel) that are automatically established after installation, and the conditions under which they are active.

Interface Defaults at Startup

Type of Connection Established/Logical Interface

VNswitch
Module

Conditions Under Which Connection Is Established

ELAN/13
ELAN/2
ELAN/3

VNswitch 900EA
VNswitch 900FA
VNswitch 900XA

The VNswitch module ATM interface is connected to a DIGITAL GIGAswitch/ATM.

FDDI ATM Bridge Tunnel/27
FDDI ATM Bridge Tunnel/16
FDDI ATM Bridge Tunnel/17
VNswitch 900EA
VNswitch 900FA
VNswitch 900XA
The VNswitch module ATM interface is connected to a DIGITAL GIGAswitch/FDDI AGL2.
Ethernet ATM Bridge Tunnel/28
Ethernet ATM Bridge Tunnel/17
Ethernet ATM Bridge Tunnel/18
VNswitch 900EA
VNswitch 900FA
VNswitch 900XA
The VNswitch module ATM interface is connected to the ATM interface of another VNswitch 900EA module.

 

These are the ATM physical interface default settings.

ATM Physical Interface Default Parameterss

Setting

Default

Transmission type

SONET

Transmission timing

local (front panel interface)
loop (interface to the DEChub backplane)

Payload scrambling

On (enable)

Testing the ModPHY card (loopback)

Off

 

These are the default parameter settings for each type of default  connection shown in Interface Defaults at Startup.

ATM Logical Interface Default Parameters

Setting

Default

ELAN Name

No name

Identifying the LES address

Automatic (mode)

Expected ARP Response Time

1 second

LE_ARP Request Retries

1

Aging Time (for LE_ARP cache entries)

300 seconds

Forward Delay Time (for LE_ARP cache entries)

15 seconds

Maximum Frame Size

1516 octets

Maximum Unknown Frame Count

1 frame

Maximum Unknown Frame Time

1 second

Control Timeout

120 seconds

VCC Timeout

20 minutes

Flush Timeout

4 seconds

Path Switching Delay

6 seconds

 

VNbus Default Setting

This default setting is for the VNbus interface.

Setting

Default

Interface status (enabled or disabled)

Enabled

 

Bridge Default Settings

These default settings are for all bridge configurations.

Setting

Default

Rate Limiting (per filter
basis)

No (disabled)

Switch-wide Rate Limiting

Disabled

Switch-wide Rate Limiting frames/second

400

Bridge Priority

32768

Port Path Cost

0 (Causes STP to calculate the Path Cost)

Port Priority

128

Bridge-Max-Age

20

Bridge-Hello-Time

2

Bridge-Forward-Delay

15

Bridge port STP state

Enabled

Manual Mode

No (disabled)

Bridge port state

Enabled

IP fragmentation

Enabled (not configurable)

IPX translation

Disabled

No Frame Interval

300 seconds

Aging Time

300 seconds

VSDs

All bridge ports on a VNswitch module are members of a default VSD. The default VSD is numbered VSD 1 and is assigned the name "Default." The VNbus tag number for the default VSD is 65. The number, name, and VNbus tag cannot be changed.

When more than one VNswitch module is resident in a MultiSwitch 900, all ports on all VNswitch modules are, by default, members of the same (default) VSD. Ports that are members of the default VSD operate as a traditional bridge without VLANs, except that the bridge spans the VNbus.

 

Maintenance Default Setting

This default setting is for maintenance procedures.

Setting

Default

Diagnostics downloads (dumps)

Disabled

 

ELS Configuration Settings

These are the Event Logging System default configurations for nonvolatile memory (NVRAM). Also see ELS Volatile Memory Configuration Defaults.

ELS NVRAM Configuration Defaults

Setting

Default

Display by subsystem

No subsystems

Trap by subsystem

No subsystems

Display by subsystem and logging level

No subsystems or logging levels

Trap by subsystem and logging level

No subsystems or logging levels

Display by event number

No events

Trap by event number

No events

Display by group

No groups

Trap by group

No groups

Maximum traps per second

0 (Indicates an unlimited number of traps per second is permitted.)

Set output (displaying events directly from the log, not from a CLI prompt)

Default (Events can be viewed by entering Events at the Main prompt.)

 

These are the  Event Logging System default configurations for volatile memory. See also ELS NVRAM Configuration Defaults.

ELS Volatile Memory Configuration Defaults

Setting

Default

Display by subsystem

No subsystems

Trap by subsystem

No subsystems

Display by subsystem and logging level

No subsystems or logging levels

Trap by subsystem and logging level

No subsystems or logging levels

Display by event number

No events

Trap by event number

No events

Display by group

No groups

Trap by group

No groups

Maximum traps per second

Equal to the current setting for maximum traps per second applied to NVRAM configuration

 

Remote Management Default Settings

These default settings are for remote management.

Setting

Default

Enabling and disabling access via modem

Disabled

OBM port speed

9600 baud

OBM RTS state (Enabled or Disabled)

Disabled

Router Discovery

Enabled

RIP Listening

Disabled

(Host) Services

Enabled

Address subnet mask (for Host Services)

255.0.0.0, if the address is a Class A IP address

255.255.00, if the address is a Class B IP address

255.255.255.0, if the address is a Class C IP address

SNMP

Enabled

One SNMP community

Public

Access to SNMP public community

Write-read-trap