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ΔΙΑΧΕΙΡΙΣΗ ΔΙΚΤΥΩΝ ΕΡΓΑΛΕΙΑ ΔΙΑΧΕΙΡΙΣΗΣ ΣΤΟ INTERNET. Β. Μάγκλαρης maglaris@netmode.ntua.gr www.netmode.ntua.gr 14 /01/2013. ΤΟ ΔΙΚΤΥΟ ΤΟΥ Ε . Μ . Π . ntua.gr (147.102.0.0/16, ASN 3323). ΔΙΑΧΕΙΡΙΣΗ ΔΙΚΤΥΩΝ TCP/IP Simple Network Management Protocol - SNMP. - PowerPoint PPT Presentation

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Internet

INTERNET

. maglaris@netmode.ntua.grwww.netmode.ntua.gr

14/01/2013

2 ...ntua.gr (147.102.0.0/16, ASN 3323)

3 TCP/IPSimple Network Management Protocol - SNMP TCP/IP stack (IP addressable Network Elements). routers, switches 1 IP interface management, /, monitoring devices, sensors, Internet ...

SNMP .

Manager ( ) - Agent ( ).

UDP Ports UDP 161 (agent daemon) UDP 162 (manager daemon agents - SNMP traps) : UDP .

: RFC (Request for Comments) IETF (Internet Engineering Task Force):RFC 1157 SNMPv1 RFCs 1155,1212 SMIv1RFCs 1905-1907 SNMPv2 RFCs 2578-2580 SMIv2 RFC 1905-1907 & 2571-2575 SNMPv3

4 SNMP

SNMP (Trap) manager Network Management Station (NMS)5 MIB , ( )rootccitt(0)iso(1)joint(2)dod(6)internet(1)directory(1)mgmt(2)experimental(3)private(4)mib(1)system(1)interfaces(2)at(3)ip(4)icmp(5)tcp(6)udp(7)egp(8)transmission(10)snmp(11)sysUpTime(3), .. sysUptime : 1.3.6.1.2.1.1.3.0org(3) snmpget snmpwalk (1/2)snmpget: SNMP SNMP GET . (object identifiers - OIDs) arguments . :

snmpget c

snmpwalk: SNMP SNMP GETNEXT . OID , GETNEXT . OID . :

snmpwalk c

6 snmpget snmpwalk (2/2)snmpget-cpublic mariana.netmode.ntua.gr system.sysDescr.0

snmpwalk c public mariana.netmode.ntua.gr at

7system.sysDescr.0 = OpenBSD mariana.netmode.ece.ntua.gr 3.8 GENERIC#632 sparc64at.atTable.atEntry.atIfIndex.1.1.0.0.0.0 = 1at.atTable.atEntry.atPhysAddress.1.1.0.0.0.0 = "00 0E A6 D0 8D FC "at.atTable.atEntry.atNetAddress.1.1.0.0.0.0 = 00:00:00:00:93:66:0D:01 ICMP: ping, traceroute

tcpdump

net-snmpsnmp-getsnmp-walksnmp-trapsnmp-set

MRTGRRDtool

Transmission (DWDM, SDH tools): CMIP, TMN, ProprietaryTL1, Q3, CorbaINTEGRATED NETWORK MANAGEMENT

Open SourceNagios Service Monitoring http://www.nagios.org/ OpenNMS Network Monitoring http://www.opennms.org/index.php/Main_Page Ganglia Cluster Management http://ganglia.info/

CommercialHP OpenviewIBM TivoliMANAGEMENT PLATFORMS

NAGIOS PLUGINSPlugin Return CodeService StateHost State0OKUP1WARNINGUP or DOWN/UNREACHABLE2CRITICALDOWN/UNREACHABLE3UNKNOWNDOWN/UNREACHABLERETURN CODE | TEXT OUTPUT |OPTIONAL PERFDATA | LONG TEXT LINE | PERFDATA

0 | PING OK - Packet loss = 0%, RTA = 0.15 ms0 | DISK OK - free space: / 3326 MB (56%); | /=2643MB;5948;5958;0;5968 NAGIOS PLUGINScheck_httpcheck_snmpcheck_icmpcheck_ntpcheck_ifoperstatuscheck_mrtgcheck_ssh check_ifstatus check_ntp_timecheck_imapcheck_upscheck_ftpcheck_ping -H -w ,% -c ,%