Index |
A unique value for each interface. Its value ranges
between 1000 and the value of ifNumber. The following
information is encoded in the ifIndex:
a. An ifIndex between 1000 and 9999 define
hardware interfaces with the following attributes.
b. An ifIndex greater than or equal to 10000 defines
a software interface. Examples include the
dialup-interfaces as defined in the biboPPPTable. |
Descr |
A textual string containing information about the
interface. The ifDesc value can be defined to help improve
readability of the interface names on the system. By
default, the hardware and software interfaces are set by the
system as follows:
a. Hardware interfaces (1000 # ifIndex # 9999):
The name is set which contains information on this
slot number, and if applicable, the unit number. For
example: 'en1' for ethernet in slot 1, 'bri2-1' for a basic
rate interface in slot 2 unit 1.
b. Software interfaces (ifIndex 10000):
The name is set to dialup(x) where x is the next available
interface number on the system. |
Type |
The type of interface, distinguished according to
the physical/link protocol(s) immediately `below'
the network layer in the protocol stack.
other(1) = none of the following;
regular1822(2);
hdh1822(3);
ddn-x25(4);
rfc877-x25(5);
ethernet-csmacd(6);
iso88023-csmacd(7);
iso88024-tokenBus(8);
iso88025-tokenRing(9);
iso88026-man(10);
starLan(11);
proteon-10Mbit(12);
proteon-80Mbit(13);
hyperchannel(14);
fddi(15);
lapb(16);
sdlc(17);
ds1(18) = T-1;
e1(19) = european equiv. of T-1;
basicISDN(20);
primaryISDN(21) = proprietary serial;
propPointToPointSerial(22);
ppp(23);
softwareLoopback(24);
eon(25) = CLNP over IP [11];
ethernet-3Mbit(26);
nsip(27) = XNS over IP;
slip(28) = generic SLIP;
ultra(29) = ULTRA technologies;
ds3(30) = T-3;
sip(31) = SMDS;
frame-relay(32) Enumerations: - other (1)
- regular1822 (2)
- hdh1822 (3)
- ddn-x25 (4)
- rfc877-x25 (5)
- ethernet-csmacd (6)
- iso88023-csmacd (7)
- iso88024-tokenBus (8)
- iso88025-tokenRing (9)
- iso88026-man (10)
- starLan (11)
- proteon-10Mbit (12)
- proteon-80Mbit (13)
- hyperchannel (14)
- fddi (15)
- lapb (16)
- sdlc (17)
- ds1 (18)
- e1 (19)
- basicISDN (20)
- primaryISDN (21)
- propPointToPointSerial (22)
- ppp (23)
- softwareLoopback (24)
- eon (25)
- ethernet-3Mbit (26)
- nsip (27)
- slip (28)
- ultra (29)
- ds3 (30)
- sip (31)
- frame-relay (32)
- adsl (94)
- radsl (95)
- sdsl (96)
- vdsl (97)
- interleave (124)
- fast (125)
- hdsl2 (168)
- shdsl (169)
|
Mtu |
The size of the largest datagram which can be
sent/received on the interface, specified in
octets. For interfaces that are used for
transmitting network datagrams, this is the size
of the largest network datagram that can be sent
on the interface. |
Speed |
An estimate of the interface's current bandwidth
in bits per second. For interfaces which do not
vary in bandwidth or for those where no accurate
estimation can be made, this object should contain
the nominal bandwidth. |
PhysAddress |
The interface's address at the protocol layer
immediately `below' the network layer in the
protocol stack. For interfaces which do not have
such an address (e.g., a serial line), this object
should contain an octet string of zero length. |
AdminStatus |
The desired state of the interface. The
testing(3) state indicates that no operational
packets can be passed. The dialup(4) state
can be used to initiate a call.
up(1) = ready to pass packets;
down(2);
testing(3) = in some test mode;
dialup(4) = initiate a call on a dialup
interface for some reason Enumerations: - up (1)
- down (2)
- testing (3)
- dialup (4)
|
OperStatus |
The current operational state of the interface. The
testing(3) state indicates that no operational packets can be
passed. If ifAdminStatus is down(2) then ifOperStatus
should be down(2). If ifAdminStatus is changed to up(1)
then ifOperStatus changes to up(1) if the interface is ready
to transmit and receive network traffic; it changes to
dormant(5) for interfaces that require additional actions
(such as a dialup interface waiting for an incoming|outgoing
call); it remains in the down(2) state if and only if
there is a fault that prevents it from going to the up(1)
state. If ifOperStatus is blocked(6) no packets can be
passed and no dialup will occur for a certain time.
up(1) = ready to pass packets;
down(2);
testing(3) = in some test mode;
unknown(4) = status can not be determined
for some reason.
dormant(5) = operational but not up (eg. dialup);
blocked(6) = currently not operational Enumerations: - up (1)
- down (2)
- testing (3)
- unknown (4)
- dormant (5)
- blocked (6)
|
LastChange |
The value of sysUpTime at the time the interface
entered its current operational state. If the
current state was entered prior to the last
re-initialization of the local network management
subsystem, then this object contains a zero
value. |
InOctets |
The total number of octets received on the
interface, including framing characters. |
InUcastPkts |
The number of subnetwork-unicast packets
delivered to a higher-layer protocol. |
InNUcastPkts |
The number of non-unicast (i.e.,
subnetwork-broadcast or subnetwork-multicast) packets
delivered to a higher-layer protocol. |
InDiscards |
The number of inbound packets which were chosen
to be discarded even though no errors had been
detected to prevent their being deliverable to a
higher-layer protocol. One possible reason for
discarding such a packet could be to free up
buffer space. |
InErrors |
The number of inbound packets that contained
errors preventing them from being deliverable to a
higher-layer protocol. |
InUnknownProtos |
The number of packets received via the interface
which were discarded because of an unknown or
unsupported protocol. |
OutOctets |
The total number of octets transmitted out of the
interface, including framing characters. |
OutUcastPkts |
The total number of packets that higher-level
protocols requested be transmitted to a
subnetwork-unicast address, including those that
were discarded or not sent. |
OutNUcastPkts |
The total number of packets that higher-level
protocols requested be transmitted to a
non-unicast (i.e., a subnetwork-broadcast or
subnetwork-multicast) address, including those
that were discarded or not sent. |
OutDiscards |
The number of outbound packets which were chosen
to be discarded even though no errors had been
detected to prevent their being transmitted. One
possible reason for discarding such a packet could
be to free up buffer space. |
OutErrors |
The number of outbound packets that could not be
transmitted because of errors. |
OutQLen |
The length of the output packet queue (in
packets). |
Specific |
A reference to MIB definitions specific to the
particular media being used to realize the
interface. For example, if the interface is
realized by an ethernet, then the value of this
object refers to a document defining objects
specific to ethernet. If this information is not
present, its value should be set to the OBJECT
IDENTIFIER { 0 0 }, which is a syntatically valid
object identifier, and any conformant
implementation of ASN.1 and BER must be able to
generate and recognize this value. |