SX20 Is showing up in ARP table but not reachable

Question

Hello,
I'm currently working on an issue at a customer site where two of the video endpoints (both SX20s, one running TC7.3 and one running TC7.2) will work in some switch ports and not work in others.  The switches that they are connected to are both 3560s running the same ios version and with the same switchport/vlan configuration.  Both switches are connected to a Nexus 5k and this is then connected to our router (2821).  The switches are managed by the local site IT while I manage the router.  All IP's are statically assigned.
On the router I can see the endpoint's MAC address and it shows up in the ARP table correctly but it is not pingable.  Our other video systems that are not SX20's work properly when connected to these ports (Tandberg 990MXP, C20 and C40).  When we replace the codec with a PC with the same IP/MASK/GW configuration it is pingable.  This leads me to believe it's not a networking issue but is an issue with the endpoints themselves.  However, they do work properly when they are connected to other ports that have the same configuration.
Has anyone else run into similar issues?
10.222.129.33 = Gateway
10.222.129.34 = SX20 #1 in a working port
10.222.129.37 = SX20 #2 in a non-working port
Router#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 10.222.129.33 - 0016.c7b0.4388 ARPA Vlan34
Internet 10.222.129.34 0 84b8.02cc.c59b ARPA Vlan34
Internet 10.222.129.37 8 84b8.02cc.be58 ARPA Vlan34
Internet 10.222.129.38 0 0050.600c.a09e ARPA Vlan34
Internet 10.222.129.40 0 e4c7.2264.216b ARPA Vlan34
Internet 10.222.129.41 13 0050.6002.43b0 ARPA Vlan34
Internet 10.222.129.43 3 00e0.db05.ba45 ARPA Vlan34
Internet 10.222.129.44 13 0050.6001.f2b5 ARPA Vlan34
Router#ping 10.222.129.37
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.222.129.37, timeout is 2 seconds:
Success rate is 0 percent (0/5)
Router#ping 10.222.129.34
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.222.129.34, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Router#

Answer 1

So you are saying for it to do what i want: shared photo stream to appear in web then i need to upgrade.
Yes
Does that mean i purchase the new software an it's not just an update?
Yes
Your profile indicates your running 10.7.5.  For shared Photo Streams you need to be running 10.8.2 or later: The following is from  iCloud: Photo Stream FAQ
What do I need to use Photo Stream?
To use Photo Stream, including Shared Photo Streams, you need an iCloud account, compatible devices, and up-to-date software:  iPhone, iPad, or iPod touch with iOS 6.0 or later Mac with OS X Mountain Lion v10.8.2 or later and iPhoto 9.4 or Aperture 3.4 or later
So you'll need to upgrade to Mt. Lion.
iPhoto requirements are free updates for iPhoto '11
LN