[cisco-voip] 7960 Phone - connected via the 10/100PC

Bell, Joe Joe_Bell at adp.com
Fri Jun 9 17:34:33 EDT 2006


The major difference between the two ports is the PC port does not
accept PoE.  The Cisco Troubleshooting handbook (version 1, pg 164)
states the PC port can be used for switch redundancy (use a cross over
cable from PC port to he second switch) so that should the PoE switch
fails, you still have network access.  You need an external power supply
for that option.  

 

How does loop avoidance work in that scenario?  Well the Phone switch
does not run STP, but it does pass BPDU's, so the switches perform the
blocking forwarding etc.

 

Joe

 

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Lelio Fulgenzi
Sent: Friday, June 09, 2006 2:14 PM
To: Linsemier, Matthew; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] 7960 Phone - connected via the 10/100PC

 

I heard that there was a hospital out there that used both ports of the
phone plugged into a switch and used this as a backup link configuration
along with the power cube.

 

Totally unsupported I believe as well.

 

------------------------------------------------------------------------
--------
Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 
"I can eat fifty eggs." "Nobody can eat fifty eggs."

	----- Original Message ----- 

	From: Linsemier, Matthew <mailto:MLinsemier at apcapital.com>  

	To: cisco-voip at puck.nether.net 

	Sent: Friday, June 09, 2006 5:06 PM

	Subject: [cisco-voip] 7960 Phone - connected via the 10/100PC

	 

	I was wondering if anyone knew the potential effects of a phone
running connected to the 10/100PC port rather then the correct 10/100SW
port.  We are in the second phase of our Teleworker rollout (replacing
the old routers with new Cisco 870's) and I am finding that our helpdesk
that originally helped many users setup their home setup had their
phones connected to the older 831/837 routers via their 10/100PC port.
These happen to be some of the same people that were also complaining
about voice quality (even though the policy-maps showed that voice was
being prioritized correctly).  Has anyone run across this? 

	 

	Matthew M. Linsemier, CCSP/CCNP/CCDA
	Senior Network Engineer
	APCapital
	Voice: 517.324.6695
	Fax: 517.333.2812
	E-Mail: mlinsemier at apcapital.com

	 

	
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