NET-SNMP Proxy V3 issues (converting from snmpv1/v2 requests to snmpv3)

Gentle reminder to the following problem.



Hi Dave, 


Synopsys: 
I am trying to proxy incoming snmpv1/v2/v3 requests as snmpv3 request from Host A to Host B (snmpv1/v2 disabled, can accept only snmpv3 requests). 
It is failing to proxy v3 Requests.


Problem Description: 
Host A 
• NET-SNMP(port 161) for proxying V3 requests
• IP Address 13.132.246.152
• For proxying V3 requests snmpd.conf modified as 
proxy -v 3 -l authpriv -u SHADESUSER -a SHA -A snmpv3authpass  -x DES –X snmpv3privpass  13.132.247.59 1.3

Host
B
• Can accept and respond to snmpV3 requests.
• IP address 13.132.247.59

From Host A (command used at command prompt)
1.A successful response received for direct request – HostB snmpV3 request handling tested success.
# /usr/sfw/bin/snmpwalk -v3 -l authPriv -u SHADESUSER -a SHA -A snmpv3authpass -x DES -X snmpv3privpass 13.132.247.59 1.3

OutPut:
Received expected MIB data
Wireshark(ethereal) Observation:
The first packet from HostA to HostB is “get-request”
Please find the screenshot attached (SuccessfulRequest.jpeg).
Get-Request circled in green.

2.Failed when proxied.
# /usr/sfw/bin/snmpwalk -v3 -l authPriv -u SHADESUSER -a SHA -A snmpv3authpass -x DES -X snmpv3privpass localhost 1.3

OutPut:
Timeout: No Response from localhost 

Wireshark(ethereal) Observation:
No “get-request” is found from HostA-HostB
Please find the screenshot attached (FailedRequest.jpeg).


Requesting you to help me in understanding NET-SNMP proxy and correct us if we are wrong.

Many Thanks,
Ravi

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