Im a newbie in network management field. Im confusing about the network management technologies. Does anyone please explain me about SNMP, RMON, SAA and NetFlow? Whatre different? And whats situation that it should be used? How can I determine?
All are ways to obtain information collected locally from a remote device / location.
SNMP get and sets counters and other information, in it's most basic sense. It's standards based, very extensible and almost ubiquitous in the networking world.
RMON is a standard for remote monitoring and more attuned to capturing and analyzing traffic, or characteristics of traffic. SNMP accomplishes most of the basic stats (volume, status, etc.) RMON is more up the protocol stack for analysis.
SAA is now know as IP SLA (see http://www.cisco.com/go/saa) It is the current incarnation of technology that evolved from tools Cisco built into IOS to measure metrics critical for assurance of IBM data center technology (SNA) when that was a much bigger piece of the networking landscape.
NetFlow is a means of monitoring and measuring IP flows. It can be used for rudimentary troubleshooting but is more commonly used for traffic management and integration with Operational Support Systems (e.g., billing) in my experience. See http://www.cisco.com/go/netflow.
The latter two are Cisco-specific, although I believe there is effort to incarnate them in IETF RFCs.
All these methodologies generally (but not entirely) require a tool to query and present the data for human consumption. SNMP tools are very widespread and built into some OS's (i.e., mibwalk). Open Source tools are also available for much snmp functionality (e.g., MRTG / RRDTool).
Question We run asr9001 with XR 6.1.3, and we have a very long delay to
login w/ SSH 1 or 2 to the device compare to IOS device. After
investigation, the there is 1s delay between the client KEXDH_INIT and
the server (XR) KEXDH_REPLY. After debug ssh serv...
Introduction The purpose of this document is to demonstrate the Open
Shortest Path First (OSPF) behavior when the V-bit (Virtual-link bit) is
present in a non-backbone area. The V-bit is signaled in Type-1 LSA only
if the router is the endpoint of one or ...
Hi, I am seeing quite a few issues with patch install and wanted to
share my experience and workaround to this. Login to admin via CLI, then
access root with the “shell” command Issue “df –h” and you’ll probably
see the following directory full or nearly ...