MIB Command s

This chapter describes commands used to display and modify the values of MIB objects (see Chapter 7). The MIB commands are as follows:

browse	Browse the MIB tree.
getsnmp	Display the value of a MIB object.
getnextsnmp	Display the value of the object in the MIB tree that follows the specified object.
setsnmp	Change the state of the specified MIB object.
walksnmp	Display the values of all MIB objects in the MIB tree starting with the specified object.

browse

Use the browse command to walk through the MIB tree and display the value of an object in the MIB tree.

Syntax


browse [mib-address]

Arguments

Use the optional mib-address argument to specify the point in the MIB tree at which the browse display starts. If you do not specify any argument, the display starts at the top of the MIB tree (at the iso object).

The address can be specified as a path of dot-separated numbers, or as a variable name, or a combination (where only the first element is a variable name). Thus, 1.3.6.1.2.1, mgmt.1, and mib all refer to the same variable. (See Chapter 7 for a description of MIB addresses.)

Examples

The following example shows how to start the browse command with the mgmt subtree:


cli> browse mgmt 
mgmt: 
       1) mib Enter line number to go down, 'u' to go up, 'q' or 'e' to quit browse. 
browse>

There is only one object under the mgmt object, so we select it by entering the menu number 1:


browse> 1  
mgmt.mib: 
        1) system 
        2) interfaces 
        3) at 
        4) ip 
        5) icmp 
        6) tcp 
        7) udp 
        8) egp 
        9) transmission 
        10) snmp 
        11) dot1dBridge 
        12) rmon 
Enter line number to go down, 'u' to go up, 'q' or 'e' to quit browse. 
browse>

There are 12 objects under the mib object. We select the object system by entering the menu number 1:


browse> 1 
 
mgmt.mib.system: 
        1) sysDescr 
        2) sysObjectID 
        3) sysUpTime 
        4) sysContact 
        5) sysName 
        6) sysLocation 
        7) sysServices 
Enter line number to go down, 'u' to go up, 'q' or 'e' to quit browse. 
browse>

All of the objects under the system object are "leaves" with no further branches under them. When we select one from the menu, the program displays the value for that object and returns to the mgmt.mib.system menu:


browse> 4  
------------------------------------------------------
Name: sysContact.0             Value: Lisa Bloch   
mgmt.mib.system: 
        1) sysDescr 
        2) sysObjectID 
        3) sysUpTime 
        4) sysContact 
        5) sysName 
        6) sysLocation 
        7) sysServices Enter line number to go down, 'u' to go up, 'q' or 'e' to quit browse. 
browse>

If we wish to explore a different branch of the mib subtree, we can enter u to return to the next higher level:


browse> u  
mgmt.mib: 
        1) system 
        2) interfaces 
        3) at 
        4) ip 
        5) icmp 
        6) tcp 
        7) udp 
        8) egp 
        9) transmission 
        10) snmp 
        11) dot1dBridge 
        12) rmon Enter line number to go down, 'u' to go up, 'q' or 'e' to quit browse.
browse>

To exit to the cli> prompt, we enter q (or e):


browse> q 
Leaving browse 
cli>

getsnmp

Use the getsnmp command to display the value of a specified MIB object. Given the addresses of one or more MIB objects, getsnmp displays the value of the MIB object at each address.

Syntax


getsnmp mib-address [mib-address [ ... mib-address]]

Arguments

The mib-address argument specifies the address of a MIB object that you want to display. As an optional, repeated argument, it specifies the address of an additional MIB object that you want to display.

The address of a MIB object has two dot-separated parts.

The last part is a numeric qualifier, the object ID. The object ID is 0 in the case of an isolated leaf. In a table, the object ID depends upon how the table entries are indexed. For example, 4002 represents card 4, port 2. The object ID may contain more than one index (see page ).
The first part of the address can be a path of dot-separated numbers, a MIB object name, or a combination (where only the first element is a MIB object name). Thus, sysDescr.0, system.1.0, mib.1.1.0, and 1.3.6.1.2.1.1.1.0 all refer to the same MIB object. See Chapter 7 for more information about MIB addresses.

To get more than one object, specify more than one object identifier. You can use the walksnmp command to identify MIB objects and their addresses.

Note Any mib-address arguments after the first are optional.

Examples


cli> getsnmp sysContact.0 sysServices.0 
Name: sysContact.0             Value: Lisa Bloch 
Name: sysServices.0            Value: 78 
cli> getsnmp 1.3.6.1.2.1.1.4.0 mgmt.1.1.7.0 
Name: sysContact.0             Value: Lisa Bloch 
Name: sysServices.0            Value: 78 
cli> getsnmp system.4.0 
Name: sysContact.0             Value: Lisa Bloch 
cli>

getnextsnmp

Use the getnextsnmp command to display the value of the next object after the specified object in the MIB tree.

Given the address of one or more MIB objects, getnextsnmp displays the value of the MIB object that comes next in the subtree after each address you specified. If you specify the last variable ("leaf" object) in a subtree, the command displays the first variable in the next following subtree.

Syntax


getnextsnmp mib-address [mib-address [ ... mib-address]]

Arguments

The mib-address argument specifies the address of the MIB object just before the object that you want to display. As an optional, repeated argument, it specifies the address of an additional MIB object whose next-following neighbor in the MIB tree you want to display.

The address can be specified as a path of dot-separated numbers, or as a variable name, or a combination (where only the first element is a variable name). Thus, 1.3.6.1.2.1.1.1, mib.1.1, system.1 and sysDescr all refer to the same variable. See the description of the getsnmp command for additional information about MIB addresses, and see Chapter 7 for a detailed description.

To get more than one object, specify more than one object identifier. You can use the walksnmp command to identify MIB objects and their addresses.

Note Any mib-address arguments after the first are optional.

Examples


cli> getnextsnmp sysContact.0 sysServices.0 
Name: sysName.0                Value: Comet 
Name: ifNumber.0               Value: 10007 
cli> getnextsnmp 1.3.6.1.2.1.1.4.0 mgmt.1.1.7.0 
Name: sysName.0                Value: lstb7 
Name: ifNumber.0               Value: 10007 
cli>

setsnmp

Use the setsnmp command to change the value of the specified MIB object.

Note The setsnmp command does not verify the values of its arguments. If there is a CLI set command for the parameter that you want to set, use it instead of the setsnmp command.

Note The setsnmp command requires protected mode. See the protected command in Chapter 4.

Note The setsnmp command requires that the read/write community name be set first to a name that has been assigned the value write in the mma.communities file. If the read/write community name has not been set first, the setsnmp command fails, because the default community name "public" is read only. See the description of the command set snmp community and the LightStream 2020 Network Operations Guide for information on setting the read/write community.

**before**Do not manipulate MIB objects unless you are familiar with SNMP.@@before@@

Caution **after**Do not manipulate MIB objects unless you are familiar with SNMP.@@after@@

Syntax


setsnmp MIBaddress value

Arguments

MIBaddress	Identifies the MIB variable to be set.
	The address can be a path of dot-separated numbers, or a variable name, or a combination (where only the first element is a variable name). Thus, 1.3.6.1.2.1.1.1.0, mib.1.1.0, system.1.0 and sysDescr.0 all refer to the same variable. See the description of the getsnmp command for additional information about MIB addresses, and see Chapter 7 for a detailed description. You can use the walksnmp command to identify MIB objects and their addresses.
value	Specifies the new value for the MIB object at MIBaddress. If the value argument contains spaces, you must quote it. The value may be a number, a string, or an object ID preceded by a colon, in the form :MIBaddress2. To determine the appropriate argument type for the specified MIB object, type ? after the first MIBaddress argument.

Example

The following example shows use of setsnmp to change the name of the contact person for the system (note quotation marks):


*cli> setsnmp sysContact.0 "Tom Smith" 
Name: sysContact.0             Value: Tom Smith 
*cli>

The following example shows use of the online help facility (typing ? after a partial command) with setsnmp to determine the type of value that can be assigned to a given object:


*cli> setsnmp ifDescr.1000 ? 
Enter an octet string 
*cli> setsnmp ifDescr.1000

walksnmp

Use the walksnmp command to display the values of all MIB objects in the MIB tree starting with the specified object.

The walksnmp command displays the names and values of all variables that are "leaves" of the MIB tree below the specified MIB object. If you specify the head of a particular subtree (as shown in the figures in Chapter 7), the command displays all the "leaf" variables at the ends of branches in that subtree. This is equivalent to repeated getnextsnmp. If you specify an object that has no branches under it, it displays the value of that object, just like getsnmp.

Use the walksnmp command to survey a range of variables, to locate a variable quickly when you know only which part of the MIB it is in, or to identify the name of a MIB variable so that you can specify it as argument of another SNMP command.

Syntax


walksnmp mib-address

Argument

Use the mib-address argument to specify the starting point. The address can be specified by a path of dot-separated numbers, by a variable name, or by a combination (where only the first element is a variable name). Thus, 1.3.6.1.2.1.1, mgmt.1.1, and system all refer to the same subtree. See the description of the getsnmp command for additional information about MIB addresses, and see Chapter 7 for a detailed description. You can use the walksnmp command to identify MIB objects and their addresses.

Example


cli> walksnmp system 
Name: sysDescr.0               Value: LightStream Data Switch 
Name: sysObjectID.0            Value: lightStreamATM 
Name: sysUpTime.0              Value: 26422638 
Name: sysContact.0             Value: Lisa Bloch 
Name: sysName.0                Value: Comet 
Name: sysLocation.0            Value: Boston, 27/412 
Name: sysServices.0            Value: 78 
cli>

Table of Contents

MIB Commands

MIB Commands

browse

Syntax

Arguments

Examples

getsnmp

Syntax

Arguments

Examples

getnextsnmp

Syntax

Arguments

Examples

setsnmp

Syntax

Arguments

Example

walksnmp

Syntax

Argument

Example

MIB Command s

MIB Command s