Cisco - SNMP Management from the Mainframe

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702 0874_04F9_c1

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© 1999, Cisco Systems, Inc.

SNMP Management From the Mainframe Session 702

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Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA. Presentation_ID.scr

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Session Overview Introduction Installation Operation Miscellaneous 702 0874_04F9_c1


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Tutorial: Experiences with the NetView/SNMP Interface

• The samples described in this session are provided by IBM TCP/IP for MVS version 3, release 2, level 0 • Tivoli’s TME 10 NetView for OS/390 was used for the testing 702 0874_04F9_c1



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Documentation Resources

• IBM TCP/IP V3R2 for MVS: customization and admin. • IBM TCP/IP V3R2 for MVS: users guide • Managing TCP/IP Networks using NetView and the SNMP interface (GG24-3690) • SNMPREXX in TCPIP.SEZAINST 702 0874_04F9_c1


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Terminology Used in this Presentation • SNMP—Simple Network Management Protocol • TCP/IP—Transmission Control Protocol/Internet Protocol • MIB—Management Information Base • ASN.1—Abstract Syntax Notation One(1.3.6.1.2.1.1…) 702 0874_04F9_c1



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Terminology Used in this Presentation (Cont.)

• PING—ICMP Echo Application • hlq.—high level qualifier • CLIST—REXX or NetView CLIST • ISM—Internetwork Status Monitor

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TCP/IP, SNMP and NetView Interface Address Space=NetView

Address Space=SNMPQE

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SNMP CMD 2 8

Address Space=TCPIP

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SNMPIUCV Task

SQESERV Socket Interface

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Platform MVS

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Internet to SNMP Agents 702 0874_04F9_c1



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SNMP Installation

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Samples Provided by IBM hlq.SEZAINST

Procedures Instructions MIB Table

hlq.SEZADSIM

SNMP Messages

hlq.SEZADSIP

SNMPARMS

hlq.SEZANPNL

Panels(122)

hlq.SEZADSIL

Load Modules

hlq.SEZANCLS

CLISTS (66) Code Point Tables(4)

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Steps to Configure SNMP • Specify SNMP configuration statements in PROFILE.TCPIP • Specify SNMP port numbers in ETC.SERVICES data set • Configure the SNMP query engine • Configure the NetView interface as an SNMP monitor • Configure the SNMP agent (SNMPD) 702 0874_04F9_c1

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PROFILE.TCPIP AUTOLOG SNMPQE SNMPD ENDAUTOLOG

; SNMP Query Engine ; SNMP Agent

OBEY IBMUSER SNMPD SNMPQE ENDOBEY PORT 161 UDP SNMPD 162 UDP SNMPQE 702 0874_04F9_c1



; SNMP Agent ; SNMPQE Agent 12

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PROFILE.TCPIP (Cont.) SYSCONTACT Hal Liberty, extension 1234 ENDSYSCONTACT SYSLOCATION 7025 Kit Creek Road, Edgewater 2nd floor, room 298 ENDSYSLOCATION 702 0874_04F9_c1

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Update ETC.SERVICES

snmp

161/udp

snmp-trap 162/udp

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# snmp request port # snmp monitor trap port



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Configure the SNMP Query Engine

Update SNMP Query Engine: Use procedure hlq.SEZAINST(SNMPPROC) Create MIB Data set: Copy hlq.SEZAINST(MIBDESC) into hlq.MIBDESC.DATA 702 0874_04F9_c1


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SNMP Query Engine Parameters • MSSNMPMS—Optional data set for NLS support; it specifies the SNMP message repository Sample: hcl.SEZAINT(MSSNMP)

• SYSTCPD—Explicitly identifies which data set is to be used to obtain the TCPIP.DATA parameters Sample: hcl.SEZAINST(TCPDATA) 702 0874_04F9_c1



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Configure NetView as an SNMP Monitor • Add: SNMP Task SNMP Command SNMPARMS SNMP Messages SNMP CLISTs SNMP PANELS SNMP Load Modules SNMP Automation Table SNMP Autotasks 702 0874_04F9_c1

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NetView Updates • Add SNMP Task: SNMP TASK

MOD=SNMPIUCV,TSKID=SNMPIUCV, PRI=5,INIT=Y

• Add SNMP Command: SNMP CMDMDL MOD=SNMP,ECHO=Y,TYPE=R,RES=Y

• Add SNMP Messages DSIMSG

hlq.SDSIMSG1 hlq.SEZADSIM

• Add SNMP CLISTs DSICLD

hlq.USER.SEZANCLS hlq.DSICLD

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NetView Updates (Cont.) • Add SNMP PANELS CNMPNL1

hlq.USER.SEZANPNL hlq.CNMPNL1

• Add SNMP load modules Steplib or add to linklist

• Add SNMP Automation Table Use hcl.SEZANCLS(SNMPAUTO)

• Add SNMP Autotasks 702 0874_04F9_c1

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Sample SNMP Parameter Data Set (SNMPARMS) Member name: SNMPARMS * * SNMPQE SNMPQE

* Userid of SNMP Query Engine

SNMPQE OESNMQD1

* Userid of SNMP Query Engine

SNMPQERT 60

* Retry timer (seconds) for IUCV CONNECT

SNMPRCNT 2

* Retry count for sending SNMP requests

SNMPRITO 10

* Retry initial timeout (10ths of a second)

SNMPRETO 2

* Retry backoff exponent (1=linear,2=exponential)

SNMPMMLL 80

* Line length for Multiline Messages 38/44

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Configure the SNMP Agent (SNMPD) • To configure the SNMP agent, perform the following tasks: Create a trap destination data set Create a community name data set Update the SNMPD cataloged procedure

Use Procedure hlq.SEZAINST(SNMPPROC) 702 0874_04F9_c1


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SNMP Command Operation

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SNMP Command SNMP GET host_name comm_name var_name1… SNMP GETNext host_name comm_name var_name1… SNMP SET host_name comm_name var_name1 var_value1 SNMP TRAPson net_mask desired _net SNMP TRAPSOFf filter_id SNMP MIBvname asn.1_name SNMP PING host_name 702 0874_04F9_c1

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Sample: SNMP GET Command: netvasis SNMP GET 172.18.55.14 public 1.3.6.1.2.1.1.1.0 Response: SNM040I SNMP Request 9405 from HAL2 Returned the following response: SNM042I Variable name: 1.3.6.1.2.1.1.1.0 SNM043I Variable value type: 9 SNM044I Variable value: Sysname: OS/390 Nodename: MVSD Release: 05.00 Version: SNM044I Variable value: 2 Machine: 9672 SNM049I SNMP Request 9405 End of response 702 0874_04F9_c1



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SNMP Command Notes

• GET, GETNext and SET can have up to ten variables • Total command restricted to 256 characters • Command is case sensitive 702 0874_04F9_c1

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REXX Coding Considerations

• NetView CGLOBAL names will be uppercase Sample: tmiba.sysDescr becomes TMIBA.SYSDESCR

• Use “address netvasis” to execute SNMP Sample: address netvasis, “SNMP cmd” HOST COMM vvar1 702 0874_04F9_c1



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Sample: SNMP PING

Command: SNMP PING 172.18.55.14 Response: SNM040I SNMP Request 9407 from HAL2 Returned the following response: SNM042I Variable name: 1.3.6.1.4.1.2.2.1.3.2.172.18.55.14 SNM043I Variable value type: 1 SNM044I Variable value: 2 SNM049I SNMP Request 9407 End of response 702 0874_04F9_c1


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Comments on Samples

• Written in 1990 and unchanged • Simple usability changes suggested • May be dropped from TCP/IP • Samples: not supported

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SNMPMGMT Samples

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SNMPMGMT Provides: • • • • • • • • 702 0874_04F9_c1

PING function Group function Traps filters query/on/off Poll hosts Poll variables GET/GETN function SET function Trap to NPDA alert function



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Output from TCP/IP Samples (SNMPMGMT)

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PF4—Groups

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PF4 Groups—#1 Output

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PF5—Trap Support

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PF-7 Poll Hosts

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Selected Host 3

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Index 3—Interface Details

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PF8—Poll Variables

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PF9 Get/Getnext

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PF9 Get/Getnext output

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Usability Changes (Suggestions)

• Change PF12 to PF3 • Change color from blue to turquoise • Change SNMP calls

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PFK Usage

Change: keys.panel01="PF1 PF12

ENTER"

rout.panel01="HLP RETURN

GETINTF”

To: keys.panel01="PF1 PF3

PF12

rout.panel01="HLP RETURN

RETURN GETINTF"

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ENTER"

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Screen Color

Change: interpret "$IX"||i '="FA IN CB HD UN"' /* set disp attributes*/ To: interpret "$IX"||i '="FA IN CT HD UN"' /* set disp attributes*/ 702 0874_04F9_c1

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Message Processing Change: jan="SNMP GET" HOST COMMUN mibsys1 mibsys2 mibsys3 'GLOBALV PUTT JAN'

/* put cmd in common global

*/

'TRAP AND SUPPRESS MESSAGES SNM040I' /* trap MLWTO message */ 'ISSCMD'

/* preserve upper or lower case*/

To: 'TRAP AND SUPPRESS MESSAGES SNM040I' /* trap MLWTO message address netvasis 'SNMP GET' HOST COMMUN mibsys1 mibsys2 mibsys3 702 0874_04F9_c1



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SNMP Monitoring

• One can to the following: Periodically poll hosts Collect MIB variables Set trap filters

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Performance Hints • • • • •

Use IP address to query hosts Put copy of MIB in NetView Build MIB table in NetView storage Use ASN.1 notation in commands Use NetView to find MIBvname, not TCP/IP Example: snmp get 172.18.55.14 public 1.3.6.1.2.1.1.1.0

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Performance Experiences RUNCMD vs. SNMP Function: Collect Router CPU and MEM details and archive Router

RUNCMD

SNMP

A

.760 seconds

.08 seconds

B

.810 seconds

.08 seconds

C

.580 seconds

.08 seconds

Show Version/sysDesc Router

RUNCMD

SNMP

B

.17 seconds

.09 seconds

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Security Considerations • NetView provides first level of security • Security is based on SNMP rules Target host must support SNMP Community names are used to control GET and SET

• Suggestions: Do not allow “SET” option Always suppress community name Always control security from the target host 702 0874_04F9_c1



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Conclusions • SNMP management from main frame is viable • Performance can be excellent • TCP/IP samples are a good starter kit • Save TCP/IP samples before they are lost • Watch for future solutions 702 0874_04F9_c1


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Why Is Cisco Looking at this Function?

• Provide the ability to mange Cisco products from the main frame • Provide alternate to the service point interface • Provide the ability to manage more than routers 702 0874_04F9_c1



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Questions?

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Please Complete Your Evaluation Form Session 702

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