I have an SG500X-48 with firmware 1.3.5
I did not upgrade to 1.4.0.x because the release notes said
Problem: When Sx500 devices are connected in a ring topology, the IP mroute entry, learned through IGMP proxy, flaps. (CSCun67979)
Solution: There is no workaround.
Now a version 1.4.1.03 is released and this problem is not in the caveats for 1.4.1.03, but it is still in the release notes under the heading 1.4.0.x
It is not mentioned in the "Issues Addressed" section
1. if a caveat is mentioned in 1.4.0.x but not in 1.4.1.03 does that mean the problem is RESOLVED in 1.4.1.03 or are the caveats cumulative?
2. my SX500s are in a ring, is the problem mentioned significant, as I don't really understand the implications?
Page 10 of firmware 1.4.1.03 release note 'R_1_4_1_RN.pdf' mentions the bug CSCun67979
There is a rfc4605 on IGMP Proxy. The RFC is not long (nine pages) and should be able to shed some light to your question of whether the caveat is significant for you.
You can always call the SMB support center to open a service request if you still have concern.
Yiu Kay Lee
Concentrix at Cisco
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