----- Original Message ----- From: "Charles Sprickman" <spork@inch.com> To: <usr-tc@mailman.xmission.com> Sent: Saturday, August 03, 2002 1:51 AM Subject: Re: [USR-TC] two arcs
On Fri, 2 Aug 2002, Seth Jacobs wrote:
You don't actually have to have an NMC card in the chassis for the chassis to take calls.
No, but I think if you have two arcs in the chassis and you're doing load balancing (the last option V mentioned), you'll have problems if the NMC goes away.
Yes this would be correct. If you loose the NMC you will have serious issues because you loose the chassis awarness messages. Generally NMC is petty stable product, avoid using it to generate a lot of traps and logs, you will be fine else you may have to have a newer nmc 333.
I'm fairly certain that any of the dual arc configs that are "dynamic" rely on the nmc, and if you lose the nmc, you're out of luck. In other words you have a second single point of failure that you tried to avoid by putting in a second arc. :)
It seems that the static config is the best, split the dsps up between two arcs and if one fails (you do monitor the chassis, right :) ? ) you manually take over the cards in the remaining arc.
For normal operations static config is the best, for operations where you need to have a back up (SLA or customer requirement) then you may want to consider this load balace senario.
Charles
Seth
----- Original Message ----- From: "Shawn Mitchell" <shawnm@iodamedia.net> To: <usr-tc@mailman.xmission.com> Sent: Friday, August 02, 2002 9:21 PM Subject: RE: [USR-TC] two arcs
Sorry.. I'm very new to the 3Com equipment...
But can someone tell me the diff between the ARC and the NMC cards?
What do the NMC cards do? What do the ARC cards do?
-----Original Message----- From: usr-tc-admin@mailman.xmission.com [mailto:usr-tc-admin@mailman.xmission.com]On Behalf Of V Sent: Friday, August 02, 2002 10:37 PM To: usr-tc@mailman.xmission.com Subject: Re: [USR-TC] two arcs
Ok on the ARC you have three options.
NMC SETTINGS Chassis Awareness: DISABLED Dynamic Slot Assignment: DISABLED DSA Idle Rebalancing: DISABLED
If you have one ARC in the chassis, all you have to do is enable
Chassis Awareness and disable everything else.
If you have more than one ARC, you have two options.
Option 1
Disable everything and configure modems static
Option 2
Hot Stand by
In here you enable one arc to static to own all the modems and insert the other ARC with NMC chassis awareness (all options enabled). On the ARC which owns all the modems static then enable all the three NMC options, save all and do not reboot. What this does is if the arc that owns all the dsp crashes (meaning if it does not come back after 5 min or more) the other HiPer arc will take over all the DSPs.
The other options is to insert the first ARC card and enable all the options under NMC and leave it own all the cards, once it does insert the second ARC card with all the options enabled. In this configuration, slowly all the modems will be shared between cards over a period of time.
-V ----- Original Message ----- From: "Lewis Bergman" <lbergman@abi.tconline.net> To: <usr-tc@mailman.xmission.com> Sent: Wednesday, July 31, 2002 10:44 PM Subject: Re: [USR-TC] two arcs
V said:
Lets first talk about the versions of ARC code. What is the
version of
ARC code you are using, the answer depends on the arc code. 5.3.100 for me. -- Lewis Bergman Texas Communications 4309 Maple ST. Abilene, TX 79602 915-695-6962
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