[cisco-voip] Re-enabled NIC on the Call Manager Has Prevented Access to the System - Please Help!

[Ryan Ratliff]

My recommendation has always been to use NFT only, never load balancing.

-Ryan

On May 19, 2007, at 3:36 PM, Jason Aarons ((US)) wrote:

Using the Cisco Media Convergence Server Network Teaming Driver with  
Operating System Versions 2000.4.3 and 2000.4.3a

http://www.cisco.com/en/US/products/hw/voiceapp/ps378/ 
prod_installation_guide09186a00806a476f.html



The above document “strongly suggests NFT” in Step6, the default is  
Auto.



I don’t see anything that states Auto is unsupported by Cisco.  I  
would think being able to use two NICS @  1000/Full would be better  
than one @ 1000/Full -jason



In Auto mode connected to a Catalyst 3500/4500/6500 with default  
settings Auto will select Transmit Load Balancing with Fault  
Tolerance (TLB)  based upon the HP Whitepaper below. If you go into  
Control Panel > Networks > Teaming Interface > Properties> HP Network  
Configuration Utility > Select HP Network Team > Properties >  
Information it will shows the actual “Current Mode” that Auto  
selected. I went into a OS2000-4-4a-SR6 and found they were Transmit  
Load Balancing with Fault Tolerance (TLB) and have been in production  
for several years with no issues relating to the NIC teaming. IPCC  
Express application isn’t supported with NIC teaming and does have  
problems.



ftp://ftp.compaq.com/pub/products/servers/networking/TeamingWP.pdf





From: Clouse, Chris [mailto:chris.clouse at berbee.com]
Sent: Saturday, May 19, 2007 1:40 PM
To: Miller, Steve
Subject: RE: [cisco-voip] Re-enabled NIC on the Call Manager Has  
Prevented Access to the System - Please Help!

The NIC’s should not be teamed.  The only method that is supported is  
Fault Tolerance Only.  Enable this mode, connect both cables, and try  
again.



Christopher Clouse, CCNP CCDP CCVP MCP Network+



From: cisco-voip-bounces at puck.nether.net [mailto:cisco-voip- 
bounces at puck.nether.net] On Behalf Of Miller, Steve
Sent: Saturday, May 19, 2007 12:16 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Re-enabled NIC on the Call Manager Has  
Prevented Access to the System - Please Help!



We have NICs in a Call Manager Subscriber in NY and one had been  
disabled for a long time.  I was told by an expert engineer (who  
actually was the architect or our system) that all of the settings  
for the cards were correct and that there was probably a cable  
unplugged.  When I got to the site, there was a cable unplugged so I  
replaced the cable and then re-enabled the card that corresponded to  
that port. At that point, we rec'd errors in the event log that the  
system could not communicate with the NTP server and now we cannot  
connect to the Call Manager via RDP or by web interface programming.   
All calls are being processed and there seems to be no current user  
issue, but I need to know if I should simply disable the connection  
again and troubleshoot or if there is something in the teaming NIC  
card setup that needs to be changed.  I have never messed with this  
before and I want to fix it, but I don't want to interfere with the  
phone service.  I'm sure that this is a simple issue, but I don't  
want a misstep.  Please let me know if you are familiar with this.   
Thank you!



Steve Miller
Telecom Engineer
Dickstein Shapiro LLP
1825 Eye Street NW | Washington, DC 20006
Tel (202) 420-3370 Fax (202)-330-5607
millers at dicksteinshapiro.com



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