speed of ethernet LAN card

[Lokesh_2]

Hi,

I want to know the speed of my OpenVMS enthernet LAN connection for Alpha . How can I get the required information from VMS . One way I know is shutdown the system and check at the SRM prompt with the command :- >>> show ew*0_mode -- and it will show me whether it is FAST ,Half-duplex, .. FASTFD..etc. Is there any command on VMS from where I can check the same from running system ??

Thanks & regards,
Lokesh

[Ian Miller. · Accepted solution]

Try
MCR LANCP SHOW CONFIG

[Lokesh_2]

Hi Ian,

Thank you, I got it. The speed it is showing is 10 . But at the SRM prompt, I set it as FAST . So , why it is showing as 10 only ? Also, can I set it to 100. I tried with the following command, but got the following error:

$ mc lancp set device ewa0/speed=100
%LANCP-W-SPNSUP, Setting speed not supported, device EWA0

Thanks & regards,
Lokesh

[Wim Van den Wyngaert]

Try
$ ana/sys
show lan/dev=xxx (e.g. eia)
and check the field "line speed" and "full duplex enable".

[Lokesh_2]

Hi ,

Some more info. You can see from the following that I cannot set the line speed to 100. I just checked in the SRM too, and it is showing me ewa0 as -- "DECchip 21040-AA" . I want to know whether this chip support 100Mbps or not ??

$ mc lancp
LANCP> sho dev/param ewa0

Device Characteristics EWA0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
08-00-2B-E2-5B-0F Hardware LAN address
Multicast address list
CSMA/CD Communication medium
FF-FF-FF-FF-FF-FF Current LAN address
128 Minimum receive buffers
256 Maximum receive buffers
No Full duplex enable
No Full duplex operational
TwistedPair Line media type
10 Line speed (mbps)
LANCP> set dev ewa0/full
LANCP> set dev ewa0/speed=100
%LANCP-W-SPNSUP, Setting speed not supported, device EWA0
LANCP> sho dev/param ewa0

Device Characteristics EWA0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
08-00-2B-E2-5B-0F Hardware LAN address
Multicast address list
CSMA/CD Communication medium
FF-FF-FF-FF-FF-FF Current LAN address
128 Minimum receive buffers
256 Maximum receive buffers
Yes Full duplex enable
Yes Full duplex operational
TwistedPair Line media type
10 Line speed (mbps)
LANCP>

Thanks & regards,
Lokesh

[Ian Miller.]

Is that a KZPSM-AA scsi/ethernet combo card in your alpha? If so it only does 10Mb.

[Martin P.J. Zinser]

Since the 21040 supports AUI connectors still and the technical documentation does not mention speed at all, I think it is pretty save to assume the chip will do 10 Mb only.

Greetings, Martin

[Mike Naime]

Lokesh:

From what I understand, the speed setting/duplex is set at the console level. and that this cannot be changed while the system is up. If it can. Please let me know how.

[John Gillings]

Mike,

>the speed setting/duplex is set at the console level. and that this cannot be changed while the system is up. If it can. Please let me know how.

LANCP can change device characteristics.
See MCR LANCP HELP SET DEVICE.

Note that as we've seen here, the console setting is more of a *request*, and will be overridden if the device doesn't support the setting.

Also note that a change will only work if you can change the switch port to match at the same time. Use SET DEVICE /SPEED=AUTO to autonegotiate with the switch.

In practice, it may not be possible to change the setting because doing so may kill your network connections.

[Wim Van den Wyngaert]

John,

I just tried to switch the full duplex setting with lancp and I can confirm that it works (badly because switch was not adjusted). A decnet copy took a very long time to complete and collision counters in ncl increased.

But no network connections were dropped(not in IP and not in decnet). Are they only dropped when changing speed ? (I can't test that because my card is 10MBit only).

[Willem Grooters]

John,

> Note that as we've seen here, the console setting is more of a *request*, and will be overridden if the device doesn't support the setting.

Is this the reason why VMS states "Simplex" in TCPIP IFCONFIG -a, thought the NIC (on-board DE500 has been set to Fast Fullduplex in console? It doesn't seem right, though, since my switch tells me it's full duplex. AFAIK console if FD is allowed as a setting, it will be set as such. Another, older DE500 refused setting to FD since it doesn't support it.

[Lokesh_2]

Hi Everybody,

I checked the documentation and found that I am using KZPSM-AA which has DECchip 21040-AA ethernet card . This supports 10Mb only. So, I got my answer now. Thanks all for your kind inputs.

Best regards,
Lokesh

[Lokesh_2]

Hi ,

On one of my VAX V7.1 system, I have done the following to get the ethernet speed. But couldn't find any...how I can I get my ethernet card speed here..
_____________________________________
$ mc lancp sho config

LAN Co*figuration:
Device Medium Default LAN Address Version
------ ------ ------------------- -------
ETA0 CSMA/CD 08-00-2B-0C-1D-2B Not available
$ mc lancp sho dev eta0/para

Device Parameters ETA0:
Value Parameter
----- ---------
Normal Controller mode
08-00-2B-0C-1D-2B Hardware LAN address
CSMA/CD Communication medium
External Internal loopback mode

_______________________

Best regards,
Lokesh

[Lokesh_2]

and here is anal/system output:

_________________________________$ anal/system



OpenVMS (TM) VAX System analyzer

SDA> sho lan/dev=eta0
LAN Data Structures
-------------------
-- ETA0 Template Unit Information 3-FEB-2004 15:07:36 --

LSB address 8F0B6F80 VCIB address 00000000
Packet format Ethernet Error count 0
Device buffer size 1500 LAN medium CSMACD
Maximum buffer size 1500 Eth protocol type 00-00
Hardware buffer quota 16 802E protocol ID 00-00-00-00-00
Receive buffer quota 0 802.2 SAP 00
Allow prom client ON 802.2 Group SAPs 00,00,00,00
Promiscuous mode OFF Maximum header size 0
802.2 service OFF Hardware address 08-00-2B-0C-1D-2B
Data chaining OFF Physical address FF-FF-FF-FF-FF-FF
Padding mode ON Can change address OFF
Automatic restart OFF Access mode EXCLUSIVE
CRC generation mode ON Controller mode NORMAL
Maintenance state ON Rcv buffs to queue 1
P2 parameters 00000000 Starter's PID 00000000
All multicast mode OFF Creator's PID 00000000
Rcv buffer quota 0 LSB size 3496
SDA>
SDA>
SDA>
______________________________________

Best regards,
Lokesh

[Wim Van den Wyngaert]

Redo the ana/sys but use eta instead of eta0.

Wim

[Lokesh_2]

Hi Wim,

I have used ETA only, it has shown informataion for all the ETA's of my system, but none revealed information about speed , half/full duplex etc. Is is because of my system is VAX and not alpha ??

Best regards,
Lokesh

[Ian Miller.]

generally there where no 100Mb ethernet interfaces for VAXes. However in recent times nemonix have created them for certain models.
Therefore your VAX will have 10Mb ethernet unless you have fitted a nemonix card.