Packet loss on ce interface.


 
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Operating Systems Solaris Packet loss on ce interface.
# 1  
Old 01-05-2011
Packet loss on ce interface.

Hi,

I am using the ce interface on my Solaris 9 server and there is significant packet loss when transmitting large packets. Does anyone have a fix for this?

----10.1.0.0 PING Statistics----
51 packets transmitted, 42 packets received, 17% packet loss
round-trip (ms) min/avg/max = 91/91/98

Thanks,

SparcmanSmilie
# 2  
Old 01-05-2011
have you patched the machine with some newer patch cluster? i remember some problems with ce interfaces which are fixed by patches... also check the cabel and the switch port settings... if this is a new problem and not something that was always there, a hardware problem might be more likely.
This User Gave Thanks to DukeNuke2 For This Post:
# 3  
Old 01-05-2011
MySQL

Hi DukeNuke2,

I've installed the 9_Recommended patch cluster and the problem still persists. This has been a problem for a few months. I will check out the Oracle website to see if there is anything there regarding a patch.

Thanks,

Sparcman
# 4  
Old 01-05-2011
Check your duplex setting :
Code:
$netstat -k ce5| egrep 'link_speed|link_status|link_duplex'
lp_cap_asmpause 0 lp_cap_pause 0 link_T4 0 link_speed 100 
link_duplex 2 link_asmpause 0 link_pause 0 link_up 1 mac_mtu 1522

The output has the following meaning:
link_up - 0 down, 1 up
link_speed - speed in Mbit/s
link_duplex - 1 half duplex, 2 full duplex, 0 down

Following will set interface to 100-FD, Forced config. Enable autoneg if you wish to use it.
You have to make relevant changed on switch side also

Code:
ndd –set /dev/ce instance 0
ndd –set /dev/ce adv_100T4_cap 0
ndd –set /dev/ce adv_1000fdx_cap 0
ndd –set /dev/ce adv_1000hdx_cap
ndd –set /dev/ce adv_100fdx_cap 1
ndd –set /dev/ce adv_100hdx_cap 0
ndd –set /dev/ce adv_10fdx_cap 0
ndd –set /dev/ce adv_10hdx_cap 0
ndd –set /dev/ce adv_autoneg_cap 0

# 5  
Old 01-05-2011
Beware that forced configurations like the one suggested are a very common root cause of networking issues and are only advised if you are sure there won't be a mismatch risk with the other connected end. Resetting to the default, i.e. auto-negotiation, is almost always a safe bet. Unless you are using old routers/switches with bogus firmwares, there should be no need to force the speed or the duplex mode.
# 6  
Old 01-06-2011
Hi,

Thanks for all your replies.

The settings of the interface are below. These settings are forced. When I use auto-neg the speed of the interface drops to 10 half duplex even though it should auto-neg to 1000 full, so I can't use auto-neg. We don't know why this happens either.

lp_cap_asmpause 0 lp_cap_pause 0 link_T4 0 link_speed 1000
link_duplex 2 link_asmpause 0 link_pause 0 link_up 1 mac_mtu 1522

I've been told a patch may help?

Thanks,

Sparcman
# 7  
Old 01-06-2011
have you checked the cable and the switch and another nic (if you have one in your machine)?
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