50% Packet Loss

[rvickers]

I'm setting up a new 520 and when I ping it, ever other ping is request time out. Any ideas???

 

[plamb]

check port spped both on the 550 and your network side lock it to 100/full

 

[RMGBELGIUM]

for some brands of switches( esp Nortel in combination with IBM servers) , the ports must indeed be set to 100 Mb full on the switch side.


greetz

R.

 

[hfaix]

Just curious, is this with the dual port onboard card? Is it etherchanneled?

What type of lpar are you trying to ping?

 

[rvickers]

This is I believe a dual port onboard card. I have set it to 10_Half_Duplex. This is the only way I can ping from my old 120 and it pings OK 100%. From a Windows XP laptop, I get the 50% loss...

 

[Hammer]

Are there cables in both ports?
Are both ports configured correctly?
Does the routing have both ports as a default route?
(use: netstat -rn)
If the default route uses both ports, and only one has a cable, you're going to get a 50% failure rate.

When pinging from the laptop: Are you pinging using the IP address or a name that DNS has to resolve? If it's the later, are their 2 entries in DNS, one right, one wrong? It is possible for DNS to toggle between multiple IPs for the same name.

 

[DukeSSD]

pSeries / RS6k ethernet does not "auto configure" well.
If you have a hub, force (via SMIT) your adapter/s to the best speed the hub supports and half duplex (hubs tend to only support half duplex).
If you have a switch, force the adapters and force the switch ports to the best common speed / duplex. If you leave one or the other on "auto configure" it will probably auto configure to the wrong speed or duplex setting and the performance will be terrible.