will plumbing impact production

[hcclnoodles]

Hi there, I have a critical production box on which network service cannot be interupted. I have 4xBGE cards in the box but only 2 are plumbed, configured and in use...

I know to plumb all available cards i would issue the command

# ifconfig -a plumb

but my question is, will issuing this command interupt the service on the other interfaces (even for a squilli-second) cos if it does, i need to arrange downtime

I realise im gonna need to arrange downtime to make the change permanent (ie edit files and reboot) but i just wanted to know if the plumb command has any sort of impact

cheers

 

[dandan123]

Why don't you plumb them individually as you only need to plumb two ports.

ifconfig bgex plumb

 

[dandan123]

You don't need to reboot.

You can edit the required files for future reboots but you can conigure all the parameters using ifconfig and netstat.

 

[hcclnoodles]

Is this how i would do it

ifconfig dmfe2 plumb
ifconfig dmfe2 10.0.0.3 netmask 255.255.255.0 up

What is the netstat command you mention ???

i know for future reboots I would need to edit

/etc/hosts
/etc/hostname.dmfe2
/etc/netmasks

is there anything else?

 

[Annihilannic]

On a relatively quiet box you should be fine, however once I plumbed (or was it unplumbed... I don't recall) an interface on a very busy 64 CPU E10000 and brought the thing crashing down, so I would wait for a quiet time at the very least.

Annihilannic.

 

[dandan123]

You're on the right track, I would add broadcast + to the end of your ifconfig command.

netstat -nr would show you your routes, including default gateway.

ifconfig dmfe2 10.0.0.3 netmask 255.255.255.0 broadcast + up