Verilink PRISM 4151 (34-00258) Product Manual - Manual (Page 35)

SNMP Agent C-1 PRISM 4151
C. SNMP Agent
This unit has an embedded SNMP agent which can be
accessed either through the built in SLIP interface or the
optional Network Interface Card (NIC). The NIC can either
be an Ethernet or Token Ring interface. With these inter-
faces, you can gain access to the PRISM 4151 through TEL-
NET or SNMP. The TELNET session is simply a
connection to the user interface of the unit.
SNMP access to the unit is limited to Management Informa-
tion Bases (MIBs) supported by the embedded SNMP agent.
The SNMP agent supports MIB-II (RFC 1213). This appen-
dix describes in detail how the embedded SNMP agent con-
forms to the RFC.
RFC 1213
This RFC defines the MIB-II specification.
systemTable
sysDescr: (read-only)
This entry is a textual description of the entity. It should
include the full name and version identification of the sys-
tem's hardware type, software operating-system, and net-
working software. It is mandatory that this only contain
printable ASCII characters. For the PRISM 4151, this value
returns the string TxPORT SNMP Agent.
sysObjectID: (read-only)
The vendor's authoritative identification of the network
management subsystem contained in the entity. This value
is allocated within the enterprises subtree (1.3.6.1.4.1) and
provides an easy and unambiguous means for determining
‘what kind of box' is being managed. For example, if ven-
dor ‘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'. For the PRISM
4151, this value returns the Object Identifier of
1.3.6.1.4.1.254.1.1.
sysUpTime: (read-only)
The time (in hundredths of a second) since the network
management portion of the system was last re-initialized.
sysContact: (read-write)
The textual identification of the contact person for this man-
aged node, together with information on how to contact this
person. The string defaults to ‘no system contact.’
sysName: (read-write)
An administratively-assigned name for this managed node.
By convention, this is the node's fully-qualified domain
name. The default is ‘no system name’
sysLocation: (read-write)
The physical location of this node (e.g.,‘telephone closet,
3rd floor'). The default is ‘no system location’
sysServices: (read-only)
A value which indicates the set of services that this entity
primarily offers. The value is a sum. This sum initially
takes the value zero. Then, for each layer, L, in the range 1
through 7, that this node performs transactions for, 2 raised
to (L - 1) is added to the sum. For example, a node which
performs primarily routing functions would have a value of
4 (2
(3-1)
). In contrast, a node which is a host offering appli-
cation services would have a value of 72 (2
(4-1)
+ 2
(7-1)
).
Note that in the context of the internet suite of protocols,
values should be calculated accordingly:
1 physical (e.g.,repeaters)
2 datalink/subnetwork (e.g., bridges)
3 internet (e.g., IP gateways)
4 end-to-end (e.g., IP hosts)
7 applications (e.g., mail relays)
For systems including OSI protocols, layers 5 and 6 may
also be counted. The PRISM 4151 returns a value of 72 rep-
resenting a host offering application services.
ifTable
ifNumber: (read-only)
The number of network interfaces (regardless of their cur-
rent state) present on this system. There are always a mini-
mum of 3 (SLIP, Network - DDS, and Port 1). The optional
interface is an NIC (Ethernet or Token Ring) card.
ifIndex: (read-only)
A unique value for each interface. Its value ranges between
1 and the value of ifNumber. The value for each interface
must remain constant at least from one re-initialization of
the entity's network management system to the next re-ini-
tialization.
With NIC Without NIC
1 - SLIP 1 - SLIP
2 - NIC 2 - DDS
3 - DDS 3- DTE Port
4 - DTE Port
ifDescr: (read-only)
A textual string containing information about the interface.
This string should include the name of the manufacturer, the
product name and the version of the hardware interface.
‘SLIP Interface’ - returned for the SLIP Interface
‘Ethernet NIC’ - returned for the NIC, for Ethernet inter-
face