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DecNet Changing NIC from EWA0 to LLB0

 
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Yves HUDON
Advisor

DecNet Changing NIC from EWA0 to LLB0

Hi,

We want to change the Device used by DecNet from EWA0 to LLB0. Fisrt we have created the device LLB with LANCP but after!...

Is anybody know a easy way to do that thing ?

We run Alpha OpenVMS V8.3 on a 5 node Cluster.

Thanks.

Jupiter7,Joe>mcr ncp show exec char

Node Volatile Characteristics as of 12-MAR-2009 13:50:31

Executor node = 1.7 (Jupiter7)

Identification = DECnet-OSI for OpenVMS
Management version = V4.0.0
Incoming timer = 0
Outgoing timer = 0
NSP version = V4.1.0
Maximum links = 0
Delay factor = 0
Delay weight = 0
Inactivity timer = 0
Retransmit factor = 0
Routing version = V2.0.0
Type = nonrouting IV
Routing timer = 0
Subaddresses = 0
Broadcast routing timer = 0
Maximum address = 0
Maximum circuits = 0
Maximum cost = 0
Maximum hops = 0
Maximum visits = 0
Maximum area = 0
Max broadcast nonrouters = 0
Max broadcast routers = 0
Maximum path splits = 0
Area maximum cost = 0
Area maximum hops = 0
Maximum buffers = 0
Segment buffer size = 0
Buffer size = 0
Pipeline quota = 0
Alias maximum links = 0
Path split policy = Normal
Maximum Declared Objects = 0
DNS interface = Enabled
7 REPLIES 7
Volker Halle
Honored Contributor
Solution

Re: DecNet Changing NIC from EWA0 to LLB0

Yves,

you're running DECnet-Plus, so you need NCL not NCP.

A simple 'trick' would be to edit SYS$MANAGER:NET$CSMACD_STARTUP.NCL and just replace the string 'EWA' with 'LLB'.

The 'correct' way to change the CSMA-CD device name is via:

$ @SYS$MANAGER:NET$CONFIGURE ADVANCED
...
[3] Configure Devices on this machine
...

and answer NONE for all devices, on which you do NOT want to run DECnet. Wait until LLB0 shows up and provide the CSMACD-n answer for the Data Link Name to use.

Check with MC NCL SHOW CSMA-CD STAT * ALL for the mapping between CSMA-CD Stations and E* or L* devices.

BTW, why are you using LLB instead of LLA ?

Volker.


Yves HUDON
Advisor

Re: DecNet Changing NIC from EWA0 to LLB0

Thanks,
We are going to test that in Labs!
Yves H.
Volker Halle
Honored Contributor

Re: DecNet Changing NIC from EWA0 to LLB0

Yes,

note that you have to restart DECnet to activate this change. Consider to boot the system to have a clean start of DECnet-Plus.

Volker.
Yves HUDON
Advisor

Re: DecNet Changing NIC from EWA0 to LLB0

Hi Volker,

On all node of the Cluster, the interface EWB0 and EWD0 are used for the Cluster communication, SCS, DecNet etc...

We use differents switchs to connect those interfaces, this private LAN is extended over 3 site!

Currently we are in the transition of extending the private LAN.

Yves H.
Peter Zeiszler
Trusted Contributor

Re: DecNet Changing NIC from EWA0 to LLB0

Definitely consider a reboot. I think I had issues making the LLA device until it got a reboot. I think it has something to do with the devices being used by a network stack.
Yves HUDON
Advisor

Re: DecNet Changing NIC from EWA0 to LLB0

HI,

About Non Single Point Of Failure (NSPOF) with DecNet and NetWork Interface Card, and for those who have a long experience with DecNet, what is the prefered way to get NSPOF on a node?

1) Configuring 2 differents NIC with DecNet
2) Using LAN_FAILOVER

For the same node, the 2 NIC are on 2 differents switchs but in the same private VLAN.

Yves H.
Hoff
Honored Contributor

Re: DecNet Changing NIC from EWA0 to LLB0

If you have DECnet-Plus (Phase V) routing enabled and selected throughout, then DECnet uses all the interconnects it can find just fine.