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07-18-2014 02:39 AM - last edited on 07-20-2014 06:45 PM by Lisa198503
07-18-2014 02:39 AM - last edited on 07-20-2014 06:45 PM by Lisa198503
ping breaks
Dear All,
We installed HP-UX 11.31 DCOE on two VMs on BL890i4. After these, we installed TEMENOS T24 R12 and oracle database R12 on the VMs respectively.
Under normal circumstances you are able to ping the two VMs without any break, but as soon as the TEMENOS application services is started the ping sessions break intermittently. This has made it impossible for us to run the application.
kindly help.
kingsley
P.S. This thread has been moved from HP-UX>System Administration to HP-UX > networking. -HP Forum Moderator
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07-18-2014 04:01 AM
07-18-2014 04:01 AM
Re: ping breaks
I assume when you say "ping breaks", you mean that one ping fails to return. The ICMP Echo Request message (ping) does not use normal packet handling in TCP/IP which means ping is not guarenteed to return reliably. It is a very primitie test and any application that uses ping as a health check needs a rewrite. Certainly you may have a networking problem that pushes ping to bottom of the stack but you'll need to look at netstat -s and lanadmin -g to gain some insight to the network health.
Bill Hassell, sysadmin
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07-18-2014 06:02 AM
07-18-2014 06:02 AM
Re: ping breaks
Hope this helps!
Regards
Torsten.
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those who understand binary, and those who don't.
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07-18-2014 07:34 AM
07-18-2014 07:34 AM
Re: ping breaks
Hi!
this are the output for netstat -s and lanadmin -g
[root@ghaccuet24np]/#netstat -s
tcp:
73805207 packets sent
71122150 data packets (50263059006 bytes)
69457 data packets (22448487 bytes) retransmitted
2679724 ack-only packets (65666 delayed)
17 URG only packets
0 window probe packets
12777 window update packets
3441 control packets
71858423 packets received
69510886 acks (for 50263070575 bytes)
221 duplicate acks
0 acks for unsent data
71656948 packets (86175455255 bytes) received in-sequence
0 completely duplicate packets (0 bytes)
0 packets with some dup data (0 bytes duped)
19 out of order packets (75460 bytes)
0 packets (0 bytes) of data after window
0 window probes
842 window update packets
35 packets received after close
0 segments discarded for bad checksum
0 bad TCP segments dropped due to state change
672 connection requests
763 connection accepts
1435 connections established (including accepts)
1500 connections closed (including 170 drops)
116 embryonic connections dropped
69468312 segments updated rtt (of 69468312 attempts)
69158 retransmit timeouts
104 connections dropped by rexmit timeout
0 persist timeouts
63 keepalive timeouts
45 keepalive probes sent
0 connections dropped by keepalive
0 connect requests dropped due to full queue
10 connect requests dropped due to no listener
0 suspect connect requests dropped due to aging
0 suspect connect requests dropped due to rate
udp:
0 incomplete headers
0 bad checksums
0 socket overflows
ip:
71920016 total packets received
0 bad IP headers
0 fragments received
0 fragments dropped (dup or out of space)
0 fragments dropped after timeout
0 packets forwarded
0 packets not forwardable
icmp:
54804 calls to generate an ICMP error message
7 ICMP messages dropped
Output histogram:
echo reply: 19616
destination unreachable: 35188
source quench: 0
routing redirect: 0
echo: 0
time exceeded: 0
parameter problem: 0
time stamp: 0
time stamp reply: 0
address mask request: 0
address mask reply: 0
0 bad ICMP messages
Input histogram:
echo reply: 115
destination unreachable: 34572
source quench: 0
routing redirect: 0
echo: 19616
time exceeded: 0
parameter problem: 0
time stamp request: 0
time stamp reply: 0
address mask request: 0
address mask reply: 0
19616 responses sent
igmp:
0 messages received
0 messages received with too few bytes
0 messages received with bad checksum
0 membership queries received
0 membership queries received with incorrect field(s)
0 membership reports received
0 membership reports received with incorrect field(s)
0 membership reports received for groups to which this host belongs
0 membership reports sent
[root@ghaccuet24np]/#lanadmin -g
Error - must enter a PPA Number
Usage: lanadmin [-a] [-A station_addr]
[-c]
[-m] [-M mtu_size]
[-p]
[-r]
[-R]
[-s] [-S speed]
[-x] [-X] options
[-g] [get_options]
[-V] [VLAN-commands]
PPA
[-e]
[-t]
Default: lanadmin
a Display current station address corresponding to PPA Number.
A Set new station address corresponding to PPA Number.
station_addr New station address in hex with '0x' prefix.
c Clear LAN statistics registers for the interface corresponding to PPA Number.
on|off Enable or disable 802.5 source routing protocol.
m Display current MTU size corresponding to PPA Number.
M Set new MTU size corresponding to PPA Number.
mtu_size New MTU size in bytes.
r Reset the local LAN interface card corresponding to the PPA Number.
R Reset MTU size corresponding to PPA Number to default.
s Display current speed setting corresponding to PPA Number.
S Set new speed setting corresponding to PPA Number.
speed New speed setting in Mbits/second.
x Display driver specific options corresponding to PPA Number.
X Set driver specific options corresponding to PPA Number.
options Specific options for -x/-X.
g Get the settings corresponding to option specified by get_options.get_options Specific options for -g.
p Display usage information corresponding to PPA Number.
V Invokes VLAN specific commands.
VLAN-commands Commands specific to VLAN and their option string.
PPA PPA Number of interface. Req'd if any options above are selected.
e Echo commands.
t Terse prompts.
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07-18-2014 04:13 PM
07-18-2014 04:13 PM
Re: ping breaks
lanadmin -g requires the lan number being investigated. So for lan0, lanadmin -g 0, for lan4, lanadmin -g 4
In your netstat listing, the retransmit timeout value appears to be high but it is cumulative so run this regularly:
netstat -s | grep 'retransmit timeouts'
If this continues to grow, you may need some work on your network (switches, routers). Also make sure you have a recen ONC bundle installed:
# swlist | grep ONC
ONCplus B.11.31.18 ONC+ 2.3
Bill Hassell, sysadmin
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07-21-2014 01:23 AM
07-21-2014 01:23 AM
Re: ping breaks
Hi Bill!
The follwing are the output for lanadmin -g lan0 for the tow servers hosting the application and the database:
/ # lanadmin -g 0
LAN INTERFACE STATUS DISPLAY
Mon, Jul 21,2014 08:18:23
PPA Number = 0
Description = lan0 HP PCI AVIO LAN Release B.11.31.1403
Type (value) = ethernet-csmacd(6)
MTU Size = 1500
Speed = 10000000000
Station Address = 0xea05762d8196
Administration Status (value) = up(1)
Operation Status (value) = up(1)
Last Change = 65
Inbound Octets = 3923016212
Inbound Unicast Packets = 119420644
Inbound Non-Unicast Packets = 2118074
Inbound Discards = 252506
Inbound Errors = 0
Inbound Unknown Protocols = 541150
Outbound Octets = 2802004791
Outbound Unicast Packets = 116591716
Outbound Non-Unicast Packets = 1194
Outbound Discards = 167428
Outbound Errors = 2
Outbound Queue Length = 0
Specific = 655367
Ethernet-like Statistics Group
Index = 1
Alignment Errors = 0
FCS Errors = 0
Single Collision Frames = 0
Multiple Collision Frames = 0
Deferred Transmissions = 0
Late Collisions = 0
Excessive Collisions = 0
Internal MAC Transmit Errors = 0
Carrier Sense Errors = 0
Frames Too Long = 0
Internal MAC Receive Errors = 0
LAN INTERFACE STATUS DISPLAY
Mon, Jul 21,2014 08:16:31
PPA Number = 0
Description = lan0 HP PCI AVIO LAN Release B.11.31.1403
Type (value) = ethernet-csmacd(6)
MTU Size = 1500
Speed = 10000000000
Station Address = 0x5edd537a1735
Administration Status (value) = up(1)
Operation Status (value) = up(1)
Last Change = 78
Inbound Octets = 202305010
Inbound Unicast Packets = 270837
Inbound Non-Unicast Packets = 1813620
Inbound Discards = 215365
Inbound Errors = 0
Inbound Unknown Protocols = 465564
Outbound Octets = 37850195
Outbound Unicast Packets = 279490
Outbound Non-Unicast Packets = 195
Outbound Discards = 0
Outbound Errors = 2
Outbound Queue Length = 5
Specific = 655367
Ethernet-like Statistics Group
Index = 1
Alignment Errors = 0
FCS Errors = 0
Single Collision Frames = 0
Multiple Collision Frames = 0
Deferred Transmissions = 0
Late Collisions = 0
Excessive Collisions = 0
Internal MAC Transmit Errors = 0
Carrier Sense Errors = 0
Frames Too Long = 0
Internal MAC Receive Errors = 0
Thanks.
kingsley
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07-21-2014 01:33 AM
07-21-2014 01:33 AM
Re: ping breaks
# nwmgr
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
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07-21-2014 01:37 AM
07-21-2014 01:37 AM
Re: ping breaks
Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan0 UP 0x5EDD537A1735 igssn 1000Base-T
lan900 DOWN 0x000000000000 hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa
/ # nwmgr
Name/ Interface Station Sub- Interface Related
ClassInstance State Address system Type Interface
============== ========= ============== ======== ============== =========
lan0 UP 0xEA05762D8196 igssn 1000Base-T
lan900 DOWN 0x000000000000 hp_apa hp_apa
lan901 DOWN 0x000000000000 hp_apa hp_apa
lan902 DOWN 0x000000000000 hp_apa hp_apa
lan903 DOWN 0x000000000000 hp_apa hp_apa
lan904 DOWN 0x000000000000 hp_apa hp_apa
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07-21-2014 01:41 AM
07-21-2014 01:41 AM
Re: ping breaks
Hope this helps!
Regards
Torsten.
__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.
__________________________________________________
No support by private messages. Please ask the forum!
If you feel this was helpful please click the KUDOS! thumb below!
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07-21-2014 06:45 PM
07-21-2014 06:45 PM
Re: ping breaks
From netstat -s:
69158 retransmit timeouts
104 connections dropped by rexmit timeout
From lanadmin -g:
Inbound Discards = 252506
Outbound Discards = 167428
These indicate significant performance problems with the network interface.
Since this is an IVM using AVIO rather than a real LAN card on a dedicated server, the data throughput may be higher than the VM can handle.
Bill Hassell, sysadmin