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тАО10-03-2005 07:44 AM
тАО10-03-2005 07:44 AM
Thomas.
Solved! Go to Solution.
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тАО10-03-2005 08:03 AM
тАО10-03-2005 08:03 AM
Solution$ MCR LANCP SHOW DEVICE /CHAR
You can set and and define line speed and duplex here. Set is the current boot, Define is the permanent configuration for the next reboot. For example:
$ MC LANCP SET DEVICE EIA0 /SPEED=100/FULL_DUPLEX
I've found that hard setting both the host and the network equipment leads to less problems.
What do you define as the heartbeat? Are you using a cross over cable? This should also be configured manually.
Andy
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тАО10-03-2005 08:10 AM
тАО10-03-2005 08:10 AM
Re: 50% packet loss problem.
Thank you very much for your quick response. Yes, I am using the crossover cable to connect the two server together. This "heartbeat" connection is to determine if the primary is down, then the secondary suppose to kick in. Let me try the command that I got from you and I'll get back with you. Thanks again Andy.
Thomas.
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тАО10-03-2005 10:38 AM
тАО10-03-2005 10:38 AM
Re: 50% packet loss problem.
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тАО10-03-2005 03:15 PM
тАО10-03-2005 03:15 PM
Re: 50% packet loss problem.
The default behavior of OpenVMS in a cluster configuration is to use all available paths for cluster traffic. Having a cross over cable in the second NIC will spare you from having problems if some bright networking type decides to "quickly do some switch maintenance during lunch when no one will notice a brief outage." Your systems will also pass cluster traffic on the primary interface. You won't need to configure this behavior, it will happen.
I've assumed that you have a DE-602 NIC based on the information in your question. The interfaces will show up as EIA0 and EIB0. For a an even more robust configuration, add a second DE-602, connect the second interface with cross over cable and use LAN Failover or FailSAFE IP on the first 2 interfaces.
Andy
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тАО10-03-2005 06:36 PM
тАО10-03-2005 06:36 PM
Re: 50% packet loss problem.
>>> consistently got the 50% packet loss
Is the packet loss resulted in using IP? If so, it might be due to the setup of interfaces and routing table. Please post your interfaces and routing table.
Thanks and regards.
Michael
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тАО10-03-2005 07:20 PM
тАО10-03-2005 07:20 PM
Re: 50% packet loss problem.
which operation or command do you use, that reports '50% packet loss' ?
TCPIP PING
If so, what does your TCPIP interface config look like (TCPIP SHOW INT) ? Did you configure both interfaces on both nodes into the same subnet ? TCPIP might do round-robin on transmit and - if it can't reach the other node on one of the IP interfaces - this would account for 50% of the packets lost.
Consider to also check your SCS channels with
$ MC SCACP> SHOW CHANNEL
and make sure, that each node has 2 channels open to the other node (via the cross-over cable and the network connection).
Volker.
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тАО10-04-2005 03:12 AM
тАО10-04-2005 03:12 AM
Re: 50% packet loss problem.
I tried the define, but that did not resolve the issue yet. Here is the Char for the interfaces for both servers:
LANCP> show dev /char
Device Characteristics EIA0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
00-13-21-08-18-1A 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
100 Line speed (mbps)
Disabled/No Failset Logical LAN state
0 Failover priority
Device Characteristics EIB0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
00-13-21-08-18-1B 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
100 Line speed (mbps)
Disabled/No Failset Logical LAN state
0 Failover priority
LANCP> show dev /char
Device Characteristics EIA0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
00-13-21-08-18-00 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
100 Line speed (mbps)
Disabled/No Failset Logical LAN state
0 Failover priority
Device Characteristics EIB0:
Value Characteristic
----- --------------
1500 Device buffer size
Normal Controller mode
External Internal loopback mode
00-13-21-08-18-01 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
100 Line speed (mbps)
Disabled/No Failset Logical LAN state
0 Failover priority
Volker,
Yes I used Ping command and get the packet loss error. Here is my TCPIP interface config look like for both servers:
UNITY1$ tcpip
TCPIP> show int
Packets
Interface IP_Addr Network mask Receive Send MTU
IE0 10.10.10.10 255.0.0.0 10 6 1500
IE1 10.1.1.1 255.0.0.0 6 6 1500
LO0 127.0.0.1 255.0.0.0 0 0 4096
TCPIP> show int
Packets
Interface IP_Addr Network mask Receive Send MTU
IE0 10.10.10.20 255.0.0.0 5 9 1500
IE1 10.1.1.2 255.0.0.0 5 6 1500
LO0 127.0.0.1 255.0.0.0 16 16 4096
TCPIP> exit
Also, here is my SCS channels for Server 1 and 2 respectively:
UNITY1$ mc scacp
SCACP> show channel
UNITY1 PEA0 Channel Summary 4-OCT-2005 10:08:12.66:
Remote LAN Dev Channel Total ECS Priority Buffer Delay Load
Total ---- Most Recent ----
Node Loc Rmt State Errors State Cur Mgt Hops Size (uSec) Clas
s Pkts(S+R) CH Opened Time CH Closed Time
---- --- --- ----- ------ ----- --- --- ---- ---- ------ ----
- --------- -------------- --------------
UNITY2 EIA EIA Open 2 N(T,P,S) 0 0 2 1426 28605.4 100
20666 04-OCT 09:41:56.66 (No time)
UNITY2 EIB EIB Open 2 Y(T,P,F) 0 0 2 1426 21534.0 100
48916 04-OCT 09:41:52.41 (No time)
UNITY1 LCL LCL Open 1 Y(T,P,F) 0 0 2 1426 253.3 0
2729 04-OCT 09:41:48.39 (No time)
UNITY2 PEA0 Channel Summary 4-OCT-2005 10:07:27.51:
Remote LAN Dev Channel Total ECS Priority Buffer Delay Load
Total ---- Most Recent ----
Node Loc Rmt State Errors State Cur Mgt Hops Size (uSec) Clas
s Pkts(S+R) CH Opened Time CH Closed Time
---- --- --- ----- ------ ----- --- --- ---- ---- ------ ----
- --------- -------------- --------------
UNITY1 EIA EIA Open 5 Y(T,P,F) 0 0 2 1426 5119.2 100
20520 04-OCT 09:41:56.52 (No time)
UNITY1 EIB EIB Open 4 Y(T,P,F) 0 0 2 1426 4394.5 100
48704 04-OCT 09:41:52.28 (No time)
UNITY2 LCL LCL Open 1 Y(T,P,F) 0 0 2 1426 253.3 0
2649 04-OCT 09:41:49.15 (No time)
Michael,
Here is my Route table:
TCPIP> show route
DYNAMIC
Type Destination Gateway
AN 0.0.0.0 10.10.10.254
AN 10.0.0.0/8 10.10.10.10
AN 10.0.0.0/8 10.1.1.1
AH 10.1.1.1 10.1.1.1
AH 10.10.10.10 10.10.10.10
AH 127.0.0.1 127.0.0.1
TCPIP>
For server 2:
UNITY2$ tcpip
TCPIP> show route
DYNAMIC
Type Destination Gateway
AN 0.0.0.0 10.10.10.254
AN 10.0.0.0/8 10.10.10.20
AN 10.0.0.0/8 10.1.1.2
AH 10.1.1.2 10.1.1.2
AH 10.10.10.20 10.10.10.20
AH 127.0.0.1 127.0.0.1
TCPIP>
Thanks all for your quick response. I really appreciate all your help. Hopefully, my issue will be resolved soon.
Thomas.
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тАО10-04-2005 04:44 AM
тАО10-04-2005 04:44 AM
Re: 50% packet loss problem.
So, something else must be wrong.
It might be good to make sure that the cable is truly good - if you can verify its operation somewhere else do so.
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тАО10-04-2005 06:02 AM
тАО10-04-2005 06:02 AM
Re: 50% packet loss problem.
IE0 10.10.10.10 255.0.0.0 10 6 1500
IE1 10.1.1.1 255.0.0.0 6 6 1500
Both of these addresses are in the same subnet but the second interface is only connected to the other ES-47 by a cross over cable. You don't need TCPIP configured to support cluster traffic (SCS).
$ TCPIP SET NOINTERFACE IE1
$ TCPIP SET CONFIG NOINTERFACE IE1
Andy