Chapter 8. Chapter 8 RMON 8-1

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1 Chapter 8 RMON 8-1

2 RMON Components Chapter 8 Data Analyzer SNMP Traffic Router BACKBONE NETWORK Router SNMP Traffic RMON Probe LAN RMON Probe Data gatherer - a physical device Data analyzer Processor that analyzes 8-2

3 Network with RMONs Chapter 8 Remote FDDI LAN Router with RMON FDDI Probe Router FDDI Backbone Network Bridge Local LAN Router Remote Token Ring LAN NMS Ethernet Probe Token Ring Probe Figure 8.1 Network Configuration with RMONs 8-3

4 RMON Benefits Monitors and analyzes locally and relays ; Less load on the network Needs no direct visibility by NMS More reliable information Permits monitoring on a more frequent basis and hence faster fault diagnosis Increases productivity for administrators 8-4

5 RMON1 RMON2 RMON MIB Chapter 8 rmon (mib-2 16) statistics (1) history (2) alarm (3) host (4) hos ttopn (5) (6) filter (7) capture (8) event (9) rmonconformance (20) probeconfig (19) usrhistory (18) a1matrix (17) a1host (16) n1matrix (15) n1host (14) addres smap (13) protocoldis t (12) protocoldir (11) Token Ring (10) RMON1 Extension Figure 8.2 RMON Group RMON1: Ethernet RMON groups (rmon 1 - rmon 9) RMON1: Extension: Token ring extension (rmon 10) RMON2: Higher layers (3-7) groups (rmon 11 - rmon 20) 8-5

6 Row Creation & Deletion State Enumeration Description valid 1 Row exists and is active. It is fully configured and operational createrequest 2 Create a new row by creating this object undercreation 3 Row is not fully active invalid 4 Delete the row by disassociating the mapping of this entry EntryStatus type introduced in RMON EntryStatus (similar to RowStatus in SNMPv2) used to create and delete conceptual row. Only 4 states in RMON compared to 6 in SNMPv2 8-6

7 RMON Groups and Functions Token Ring Statis tics Token Ring Statis tics Token Ring His tory His tory Ethernet Statis tics Ethernet Statis tics Ethernet His tory His tory Rem otely Monitored Network Data Gathering Host and Conversation Statistics Host Statis tics Hos ttopn Statis tics Matrix Statis tics Network Manager Filter Group Packet Filtering Channel Filtering Packet Capture Alarm Generation Event Generation Figure 8.3 RMON1 Groups and Functions 8-7

8 RMON1 MIB Groups & Tables Group OID Function Tables Statistics rmon 1 Link level statistics -etherstatstable -etherstats2table History rmon 2 Periodic statistical collection and storage for later retrieval Alarm rmon 3 Generates events when the sample gathered crosses preestablished thresholds -historytable -etherhistorytable -history2table -etherhistory2table -alarmtable Host rmon 4 Gathers statistical on hosts -hosttable -hosttable -hosttimetable -host2table HostTopN rmon 5 Computes the top N hosts on the respective categories of statistics gathered Matrix rmon 6 Statistics on traffic between pair of hosts Filter rmon 7 Filter function that enables capture of desired parameters Packet Capture rmon 8 Packet capture capability to gather packets after they flow through a channel -hosttopntable -Table -SDTable -DSTable -2Table -filtertable -channeltable -filter2table -channel2table -buffertable -capturebuffertable Event rmon 9 s the generation of -eventtable events and notifications Token Ring rmon 10 See Table 8.3 See Table

9 Textual Convention: LastCreateTime and TimeFilter LastCreateTime tracks change of with the changes in in the tables Timefilter used to download only those rows that changed after a particular time FooTable (bold indicating the indices): footimemark fooindex foocounts Chapter 8 foocounts foocounts foocounts foocounts foocounts foocounts foocounts foocounts foocounts (Note that row #1 does not exist for times 4 & 5 since the last update occurred at time-mark 3.) foocounts (Both rows #1 and #2 do not exist for time-mark greater than 5.) 8-9

10 and Data Tables Table Entry Table Entry Index AddlIndex Other Index DataSource TableSize Owner Status Other Index AddlIndex Other Index DataSource TableSize Owner Status Other Index AddlIndex Other Index AddlIndex Other Note on Indices: Indices marked in bold letter Value of Index same as value of Index Figure 8.4 Relationship between and Data Tables 8-10

11 Matrix and SD Tables SDTable Table SDEntry Entry SD Source Address = SD Destination Address = SD Index = 1 SD Pkts = Index = 1 DataSource =ifindiex.1 TableSize = 10 Owner = "Bob" Status = 1 Last DeleteTime = 1000 SD Source Address = SD Destination Address = SD Index = 1 SD Pkts = Index = 2 DataSource =ifindiex.2 TableSize = 10 Owner = "Bob" Status = 1 Last DeleteTime = SD Source Address = SD Destination Address = SD Index = 2 SD Pkts = Note on Indices: Indices marked in bold letter Value of Index same as value of Index SD Source Address = SD Destination Address = SD Index = 2 SD Pkts = Figure 8.4 Relationship between and Data Tables 8-11

12 Host Top N Group Example HostT opn Host 1 Host 2 Host 3 Host 4 Host 5 Host 6 Host 7 Host 8 Host 9 Host Giga Octets Figure 8.5 HostTop-10 Output Octets 8-12

13 Filter Group filtertable filterentry channeltable channelentry filterindex = 1 filter ChannelIndex = 1 Filter Parameters channel Index =1 channel IfIndex = 1 channel AcceptType channel Data Other Channel Parameters filterindex = 2 filter ChannelIndex = 1 Filter Parameters channel Index = 2 channel IfIndex channel AcceptType channel Data Other Channel Parameters filterindex = 3 filter ChannelIndex = 2 Filter Parameters Note on Indices: Indices marked in bold letter Value of filterchannelindex same as value of channelindex filterindex = 4 filter ChannelIndex = 2 Filter Parameters 8-13

14 Packet Capture Group Channel Table Filter Table (many for each channel) Capture Buffer Table (One entry per Channel) 8-14

15 RMON TR Extension Groups Token Ring Group Function Tables Statistics Current utilization and error statistics of Mac Layer tokenringmlstatstable tokenringmlstats2table Promiscuous Statistics Mac-Layer History Promiscuous History Current utilization and error statistics of promiscuous Historical utilization and error statistics of Mac Layer Historical utilization and error statistics of promiscuous tokenringpstatstable tokenringpstats2table tokenringmlhistorytable tokenringphistorytable Ring Station Station statistics ringstationtable ringstationtable ringstation2table Ring Station Order Ring Station Configuration Source Routing Order of the stations Active configuration of ring stations Utilization statistics of source routing information ringstationordertable ringstationconfigtable ringstationconfigtable sourceroutingstatstable sourceroutingstats2table 8-15

16 RMON2 Applicable to Layers 3 and above Functions similar to RMON1 Enhancement to RMON1 Defined conformance and compliance 8-16

17 RMON2 MIB Chapter 8 Table 8.4 RMON2 MIB Groups and Tables Group OID Function Tables Protocol rmon 11 Inventory of protocols protocoldirtable Directory Protocol Distribution rmon 12 Relative statistics on octets and packets protocoldisttable protocoldiststatstable Address Map rmon 13 Mac address to network address on addressmaptable addressmaptable the interfaces Network rmon 14 Traffic from and n1hosttable Layer Host Network Layer Matrix Application Layer Host Application Layer Matrix User History Collection Probe Configuration RMON Conformance rmon 15 rmon 16 rmon 17 rmon 18 rmon 19 rmon 20 to each host Traffic from each pair of hosts Traffic by protocol from and to each host Traffic by protocol between pairs of hosts User-specified historical on alarms and statistics Configuration of probe parameters RMON2 MIB Compliances and Compliance Groups n1hosttable n1matrixtable n1matrixsdtable n1matrixdstable n1matrixtopntable n1matrixtopntable a1hosttable a1matrixsdtable a1matrixdstable a1matrixtopntable a1matrixtopntable usrhistorytable usrhistoryobjecttable usrhistorytable serialconfigtable netconfigtable trapdesttable serialconnectiontable See Section

18 ATM RMON Upper Layer Protocols RMON-2 (RFC 2021, 2074) Appl ication Layer Network Layer ATM Protocol IDs for RMON-2 (Additions to RFC 2074) Ethernet RMON (RFC 1757) Token Ring RMON (RFC 1513) 'Base' Layer Switch Extensions for RMON ATM RMON IETF MIBs Additional MIBs Figure 8.7 RMON MIB Framework ( 1995 ATM Forum) 8-18

NET311 Computer Network Management RMON

NET311 Computer Network Management RMON Dr. Mostafa H. Dahshan Department of Computer Engineering College of Computer and Information Sciences King Saud University mdahshan@ksu.edu.sa Acknowledgements