Extreme Networks ExtremeWare XOS 11.3, Руководство пользователя

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CNA Agent
ExtremeWare XOS 11.3 Concepts Guide
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The system sends messages to the syslog for each new connection, the status of that connection,
received test requests, and reported test results. Also EMS messages are generated after successful
registration.
Redundancy—BlackDiamond 10K Switch and BlackDiamond
8800 Family of Switches Only
The CNA Agent software offers resiliency and redundancy on the BlackDiamond 10K switch and the
BlackDiamond 8800 family of switches. On systems with a primary and a backup MSM, the CNA Agent
software fails over to the backup MSM when the primary MSM goes down. Also, the MSM restarts the
CNA Agent software if the CNA Agent goes down or gets into a looped condition.
Downloading the CNA Agent Software Module
To use the CNA Agent functionality, you download the separate Extreme Networks software module
(cna.xmod) following the instructions outlined in
Appendix A .
Because the CNA Agent software uses openSSL, you must first download the separate Extreme
Networks SSH software module that contains SSL.
NOTE
You must download the SSH module prior to downloading the CNA module.
If you attempt to download the CNA software module and you have not already downloaded the SSH
software module, the system returns an error.
Running the Tests
The CNA Server requests the CNA Agent to run a specific test, and the CNA Agent runs the test and
reports the results back to the CNA Server.
The CNA Agent can run the following tests:
●
Traceroute—Measures per-hop round-trip delays to a target IP address by sending a sequence of
hop-limited UPD messages, each with a time-to-live (TTL) value that is one greater than that of the
preceding message.
●
RTP—Emulates VoIP traffic to measure delay, packet loss and jitter to another CNA Agent by
sending a simulated RTP stream that is echoed back.
●
Ping—Sends an ICMP echo message to a target IP address and reports whether or not a response
was returned.
●
TCPconnect—Attempts to establish a TCP connection to a specified port at a target IP address and
reports whether the attempt succeeded or failed.
●
Merge—Used by CNA software to identify a single device with multiple IP addresses and to merge
its multiple appearances into one in the network topology map.