- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - OpenVMS
- >
- VMS731_LAN-V1200
Categories
Company
Local Language
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Forums
Discussions
Discussions
Discussions
Forums
Discussions
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Community
Resources
Forums
Blogs
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-20-2004 08:32 PM
10-20-2004 08:32 PM
VMS731_LAN-V1200
It is possible for ethernet frames to be reported as successfully sent when the driver has not sent them yet. The failure to send will only be reported in the statistics !
It is possible for a frame to be reported as not send due to timeout and infact it gets successfully sent !
As it points out, the transmission of data in ethernet frames is a datagram sort of service and higher level protocols have to cope.
One bit good news is that this patch kit has the duplex mismatch detection code in (mentioned at the TUD) - a console message is output by the driver if it thinks there may be duplex mismatch (e.g NIC on full duplex, switch on half uplex). This should help detect this problem which has bothered some people here.
Purely Personal Opinion
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-20-2004 09:13 PM
10-20-2004 09:13 PM
Re: VMS731_LAN-V1200
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-20-2004 09:32 PM
10-20-2004 09:32 PM
Re: VMS731_LAN-V1200
(see Terry Pratchett Monstrous Regiment)
Purely Personal Opinion
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-20-2004 10:55 PM
10-20-2004 10:55 PM
Re: VMS731_LAN-V1200
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-21-2004 01:01 AM
10-21-2004 01:01 AM
Re: VMS731_LAN-V1200
see Terry Pratchett
Shouldn't information going to The Unseen University be shielded for commoners?
Looks like they achieved it :-)
Cheers.
Have one on me.
Jan
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-21-2004 10:01 AM
10-21-2004 10:01 AM
Re: VMS731_LAN-V1200
well the first paragraph makes one wonder how the DEATH of network pakets looks like and what he uses as a scythe ;-)
Sorry, could not resist, it is too long I read my last Pratchett book.
Cheers,
Martin
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-23-2004 06:55 AM
10-23-2004 06:55 AM
Re: VMS731_LAN-V1200
However the point of my posting was to see if people thought that the behaviour of the LAN driver with this patch was surprising. It can report success when the transmit has failed and failure when the transmit succeeds! This seems very strange to me although I do accept the point about it being a datagram level service.
Purely Personal Opinion
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-23-2004 08:06 AM
10-23-2004 08:06 AM
Re: VMS731_LAN-V1200
Yes, it seems strange. But if you think abbout collisions, packets droped by network devices (bridges,switches,routers...) and packets which are not received in sequence, this must be handled by a higher protocol. Which is the difference between a not sent packet and a droped packet?
Maybe the sent packet reported as not sent is slightly more difficult to handle. I dont know how higher protocols handle this. TCP puts a sequence number in the packet header and probably drops duplicate packets.
The duplex mismatch detection code is realy a good new. This is realy a problem which is seen to much times. The worth thing abbout this problem is that the network works, but like an old modem connection.
Bojan
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
10-24-2004 03:58 AM
10-24-2004 03:58 AM
Re: VMS731_LAN-V1200
Good choice, Maredsous. Also try Chimay blue and Rochefort 10.
1) It is possible for ethernet frames to be reported as successfully sent when the driver has not sent them yet.
-> Yes. You get an OK as fast as it is put into a buffer. It is the tcp or decnet software that will receive the NOK and increase the counters/do retransmit.
2) It is possible for a frame to be reported as not send due to timeout and infact it gets successfully sent !
-> Yes. If the network fails when your frame was sent and a network failure occurs before the ack/answer is received.
Wim