Monitoring Network Interface

[joe_91]

Hi Team:

I have to monitor lan1 and lan3. We had put seperate packages on these interfaces in MC/SG. Can someone provide a quick way to monitor whether the packets are getting seperated, lan1 and lan3 (earlier everything was going thru lan1).

Cheers
Joe.

[James R. Ferguson]

Hi Joe:

Try:

# netstat -i

Regards!

...JRF...

[MANOJ SRIVASTAVA]

Hi Joe


Quickest way is to do a netstat -nr and then check the use column which will ahve gthe packets on lan interface wise , so if you can correaalte the traffic you can get a fair idea as to waht is ahppeneing , also do a netstat , or if you ahve glacne then next kyes n network will give you waht you want .

for historical data you need something like measure ware .

Manoj Srivastava

[joe_91]

Hi:

After seperating the packages i see that the opkts are increasing in lan3 but not the ipkts. I think for some reason the packets are going out thru lan3 but getting the ipkts on lan1. What could be the issue?

Thanks
Joe.

[Anil C. Sedha]

Joe,

The packets might be routing through the default DNS ipaddress configured for your system.

It's a very tricky thing when you configure your n/w such that packets are received for a different nic card which you would like to use more often.

I had done this once for our network. This is just about configuring your routes.

Please can you specify what exactly is your requirement on this question.

Regards,
Anil

[Thomas Schler_1]

Joe,

I recommend to use GlancePlus to monitor all the resources
of the MC/SG nodes, not only now and not only network
traffic. If you don't know GlancePlus (HP software), here is a short description:

GlancePlus is a real-time performance monitoring and
diagnostic tool that helps you get the best possible performance from your computer system. Real-time means that
GlancePlus shows you, in words and pictures, exactly what's
going on inside your computer right now. You define the time interval yourself -- "right now" can mean what your computer was doing a second, a minute, or an hour ago.

[rick jones]

configuring multiple physical NICs into the same IP subnet provides "opportunities" :)

by default, traffic will be received on both, but will only go out the first one ifconfiged.

you might consider aggregating both NICs with Auto Port Aggregation and then assigning the IPs to the aggregate. You can then configure APA to "schedule" packets via a number of means, including destination IP address or destination MAC address.

if you do not want to go with APA, you may need to experiment with explicit host/network routes using each of the local IPs as the gateway IPs and rely on proxy ARP in the routers.

another option is to experiment with setting ip_strong_es_model to a value of 1

ftp://ftp.cup.hp.com/dist/networking/briefs/annotated_ndd.txt