AP 3700-9 COMMUTATION CUSTOMER LAN PORTS IN CASE OF ERROR

[vitore]

Hi everyone.

I need some help.

I have a peripheral shelf AP3700-9 connected to a Hipath 4000 by a lan network, where the AP3700-9 is connected to 2 different switches (redundant lan). Those switches are connected to 2 different routers, and they to another router.

My problem is, when I cut physically (L1) the connection between each NCUI2 LAN port to each switch, all is OK, no loosing calls.

But when I cut the connection between the active switch to the router (the active NCUI2 Lan port), no commutation between LAN1 to LAN2 in the NCUI2 occurs. I assume it only detects L1 failures.

Is it possible to configure it differently? With heartbeets or similar?

Thank you very much
Vitore

 

[sbcsu]

What you describe is a network problem, not a HiPath problem.
As you say it probably only detects L1 failures.
Try OSPF or similar on the network side.

 

[donb01]

I am not a network person, but when I did mine I was involved in those conversations, and I know they were discussing how the NCUI and STMI cards work because mine is the same way except for the redundant routers. Their line of discussion was related to the fact that some network switches do not like when you have 2 different switch ports assigned to the same IP address, or sometimes there is a feature you have to make sure is turned on. Sorry that's the depth of my network knowledge right now. The way the STMI and NCUI cards work is there is one IP address for the board but 2 network connections - even though only 1 LAN port is used at a time. If the first connection drops it will switch to the second in a wink - which usually isn't enough to drop a call. If you have an APE emergency processor in the shelf and the network connection is lost, the system will switch to the APE processor. I suspect, but cannot confirm that in that case it might be enough to drop calls. Mine have switched on occasion but I have never been physically there when it happens, and no customers have complained of dropped calls, so I can't be sure... All of our network switches are newer Cisco POE products

Hope this provides some ideas for the networking people at your site....

 

[vitore]

Thank you very much.

So, lets see if I understand...

Both LAN ports at NCUI / STMI: Only works one port at same time, and only change to the other in case of L1 failure. Then, no way to commute in case of fail up in the network. Is it right?

But, When enter in action the AP Emergency??? I don't understand that point. Is it by L1 too, or is it by network protocols? Please, explain me that.

Thanks a lot.

 

[donb01]

Both LAN ports at NCUI / STMI: Only works one port at same time, and only change to the other in case of L1 failure.

Correct. The second jack will be enabled if the LAN goes down to the first one. All of the board settings will remain the same, but the presumption is that you are on a completely different network switch, or closet.

If both network connections fail on an IPDA Shelf the shelf is down because it can't talk to the "mother ship".

If you have an APE (Access Point Emergency) processor cartridge installed in that shelf it will take over operation of the shelf. If you have building trunking local to the shelf you will be able to make an receive external calls, otherwise you will only be able to make internal calls in that building (because presumably the connection is down to everywhere else).

Usually when the system switches from "network" control to "APE" control the system will reboot and reload off the APE processor, and the same thing will occur when the network comes back up and it switches back. There will be a total outage at the site while the shelf reloads - maybe 2 minutes or so.

Hope that is more clear.