Help for MVS Stack Data Summary
This help page explains the System MIB objects and the IBM enterprise MIB objects for this TCP/IP stack. Some of the data displayed on this page represents the objects that correspond to information in the TCP/IP profile definition for this stack. Some data fields can be changed by overtyping the data field with the new information. The community name field allows you to enter a write password for this resource to enable you to set an object using the SNMP Set command.
MVS Stack
This field shows the name of the requested resource.
Proc Name
The MVS proc name used to start TCP/IP for the stack.
ASID
The MVS Address Space ID of the address space where the stack is running.
Primary IP Address
The IP address associated with the interface defined in Primary Interface field.
Primary IF Index
The IF index of the designated primary interface. A value of zero implies that this option was not configured. Click in the data field to change this value.
System Name
An administratively-assigned name for this managed node. Click in the data field to change this value.
UP Time
The date and time since the network management portion of the system was last reinitialized. This field uses the SNMP date and time textual convention. The basic format is: Year-Month-Day,Hour:Minute:Second.Tenths. For a full description of the convention, see RFC1903.
System Services
The set of services that this entity primarily offers based on OSI layers. When a service is active, it is displayed. If the service is not active, it is displayed as none. The OSI layers are:
Physical (for example, repeaters) | |
Datalink/subnetwork (for example, bridges) | |
Internet (for example, IP gateways) | |
End-to-end (for example, IP hosts) | |
Applications (for example, mail relays) |
Description
A textual description of the entity. This value should include the full name and version identification of the hardware type of the system, software operating system, and networking software. It is mandatory that this only contain printable ASCII characters.
Location
The physical location of this node (for example, `telephone closet, 3rd floor'). Click in the data field to change this value.
Contact
The textual identification of the contact person for this managed node, together with information on how to contact this person. Click in the data field to change this value.
Object ID
The vendor's authoritative identification of the network management subsystem contained in the entity. This value is allocated within the SMIenterprises subtree (1.3.6.1.4.1) and provides an easy and unambiguous means for determining the type of box is being managed. For example, if vendor `Flintstones, Inc.' was assigned the subtree 1.3.6.1.4.1.4242, it could assign the identifier 1.3.6.1.4.1.4242.1.1 to its `Fred Router'.
Source Virtual IP Addr(VIPA) Enabled
Indicates, if set to true, that SOURCEVIPA support is enabled. This object can be changed in the ASSORTEDPARMS TCP/IP PROFILE statement. The value for this field can be No, not enabled or Yes, enabled.
TCP Statistics Enabled
Indicates, if set to true, that the generation of TCP/IP statistics is enabled. If enabled, statistics will be recorded at the SMF interval in the SMF record subtype 5. The value for this field can be No, not enabled or Yes, enabled.
Firewall Enabled
Indicates, if set to true, that firewall support is enabled. This object can be changed in the IPCONFIG TCP/IP PROFILE statement. The value for this field can be No, not enabled or Yes, enabled.
Round Trip Gain
Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of .0001.
Max Retransmit Time
Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.
Variance Gain
Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of .0001.
Min Retransmit Time
Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of 100th of a second.
Variance Multiplier
Used in the TCP/IP re-transmission time-out calculation to determine how long to wait for an acknowledgement before resending a packet. Expressed as an integer in units of .0001.
Send Garbage Enabled
If true, indicates that the TCP option SENDGARBAGE is enabled. Valid values for this field can be No, not enabled or yes, enabled.
Max IP Reassembly Size
The maximum IP reassembly size in units of octets.
Dev Retry Duration
Specifies the duration (in seconds) of the retry period for a failed
device. TCP/IP will perform reactivation attempts at 30 second
intervals during this retry period. The default for dev
retry duration is 90 seconds. A specification of 0 generates an
infinite recovery period, meaning reactivation attempts will be
performed until the device is either successfully reactivated, or
manually stopped (via VTCPIP,STOP or OBEYFILE). The maximum specifiable
value is 4294967296. Click in the data field to change this value.
Note:Guidelines for setting dev retry duration:
The default 90 second retry duration is sufficient for transparent
recovery following many types of device or channel error. However,
certain ESCON-attached routers cannot complete a microcode load in 90
seconds and installations may want to increase the DEVRETRYDURation to
automatically recover the device following these longer outages. On the
other hand, installations running extensive automation built upon SNMP
status and alerts may choose to code a small (nonzero) value in
dev retry duration, such that device recovery is deferred to external
automation software, rather than a function of TCP/IP itself.
Keep Alive Timer
TCP keep alive timer, expressed in minutes. The value is in range 0-35891. A value of 0 deactivates the timer. Click in the data field to change this value.
UDP Checksum
UDP checksum can have the value off, checksum off or on, checksum on. Click on the drop-down list to change the current value.
Max Socket Connections
Maximum number of socket connections. The value is in range 1-2147483647. Click in the data field to change this value.
Re-Directs
This is an IP layer attribute which displays the default of process redirects. The current stack is the IGNOREREDIRECT parm on ASSORTEDPARMS statement. Re-Direct values can be either process, to set the object to process or ignore, to set the object to ignore. Click on the drop-down list to change the current value.
UDP Queue Limit
Indicates if the UDP queue limit of 163,840 bytes of UDP data per socket is in effect or not. 163,840 is equal to 8K times 20 datagrams. This limit is based on the total number of bytes, not datagrams. The UDP queue limit can be either yes, queue limit or no, no queue limit. Click on the drop-down list to change the current value.
IP Forwarding
The indication of whether this entity is acting as an IP router in respect to the forwarding of datagrams received by, but not addressed to, this entity. If this entity is acting as a router, this object also indicates what type of forwarding is in effect. The value of this object is originally determined by the TCP/IP Profile ASSORTEDPARMS or IPCONFIG statements. A value of notForwarding indicates that this entity is not forwarding datagrams. A value of forwardingNoMultipath indicates that this entity is forwarding datagrams using the first available route. A value of forwardingMultipathPkt indicates that this entity, when forwarding datagrams, will select a route on a round-robin basis from a multipath routing list. Click on the drop-down list to change the current value.
SubAgent Cache Timeout
Specifies the amount of time to wait for re-retrieval of specific MIB data from target. A value of 0 implies that every GET or GET-NEXT request should result in the re-retrieval of the needed data. Maximum amount of time to cache is 1 hour (3600 seconds). The value is in range 0-3600. Click in the data field to change this value.
ARP Cache Timeout
Use the ARP cache timeout to specify the number of seconds between creation or revalidation and deletion of ARP table entries. The ARP cache timeout default is 20 minutes, 1200 seconds. The value of this object is expressed in seconds. The value is in range 60-86400. Click in the data field to change this value.
Restrict Low TCP Ports
Indicates if TCP low ports are restricted to authorized servers/socket applications. This value can be either no, do not restrict or yes, restrict. Click on the drop-down list to change the current value.
Restrict Low UDP Ports
Indicates if UDP low ports are restricted to authorized servers/socket applications. This value can be either no, do not restrict or yes, restrict. Click on the drop-down list to change the current value.
MultiPath Discovery
If the value is true, the PATHMTUDISCOVERY IP option is enabled. If false, the PATHMTUDISCOVERY IP option is disabled. This value can be either no, disabled or yes, enabled. Click on the drop-down list to change the current value.
MultiPath Type
The type of multipath processing currently active. The types are defined under the MULTIPATH parameter on the IPCONFIG profile statement. This value can be NO MULTIPATH, to set the object to no multipath; PER CONNECTION, to set the object to per connection; or PER PACKET, to set the object to per packet. Click on the drop-down list to change the current value.
TCP Buffer Size
Send | Size of the TCP Send buffer, expressed in bytes. The value is in range 256-262144. Click in the data field to change this value. |
Receive | Size of the TCP Receive buffer, expressed in bytes. The value is in range 256-262144. Click in the data field to change this value. |
UDP Buffer Size
Send | Size of the UDP Send buffer, expressed in bytes. The value is in range 1 to 65535. Click in the data field to change this value. |
Receive | Size of the UDP Receive buffer, expressed in bytes. The value is in range 1 to 65535. Click in the data field to change this value. |
TCP Max Receive Buffer Size
TCP maximum receive buffer size, expressed in bytes. The value is in range 256-524288. Click in the data field to change this value.
Community Name
The community name field allows you to enter a write password for this resource to enable you to set an object using the SNMP Set command. The name entered will not be displayed on the screen.
Interface List
Click on this button to display the interfaces associated with this resource.
Port List
Click on this button to display the current ports defined in the TCP/IP profile as reserved.
TCP/UDP/ICMP/IP Data
Click on this button to display the TCP, UDP, ICMP network, and IP status for this resource excluding interface specific objects.
Update Fields
Click on this button to update the changes you made to the data fields.