SNMP MIB Search

Information about a path to a network received from
a peer.

Entry containing information about the
connection with a BGP peer.

Each entry represents a capability received from a
peer with a particular code and an index. When a
capability is received multiple times with different
values during a BGP connection establishment,
corresponding entries are differentiated with indices.

An entry is identified by an AFI/SAFI pair and
peer address. It contains names associated with
an address family.

An entry is identified by an AFI/SAFI pair and
peer address. It contains information associated
with route prefixes belonging to an address family.

Represents Address Family Identifier(AFI) of the
Network Layer protocol associated with the route.
An implementation is only required to support IPv4
unicast and VPNv4 (Value - 1) address families.

Represents Subsequent Address Family Identifier(SAFI)
of the route. It gives additional information about
the type of the route. An implementation is only
required to support IPv4 unicast(Value - 1) and VPNv4(
Value - 128) address families.

Represents the type of Network Layer address stored
in cbgpRoutePeer. An implementation is only required
to support IPv4 address type(Value - 1).

The Network Layer address of the peer where the route
information was learned. An implementation is only
required to support an IPv4 peer.

A Network Address prefix in the Network Layer
Reachability Information field of BGP UPDATE message.
This object is a Network Address containing the prefix
with length specified by cbgpRouteAddrPrefixLen. Any
bits beyond the length specified by
cbgpRouteAddrPrefixLen are zeroed.

Length in bits of the Network Address prefix in the
Network Layer Reachability Information field.

The ultimate origin of the route information.

The sequence of AS path segments.  Each AS
path segment is represented by a triple
<type, length, value>.
The type is a 1-octet field which has two
possible values:
1  AS_SET: unordered set of ASs a route in the
UPDATE message has traversed
2  AS_SEQUENCE: ordered set of ASs a route in the
UPDATE message has traversed.
The length is a 1-octet field containing the
number of ASs in the value field.
The value field contains one or more AS
numbers, each AS is represented in the octet
string as a pair of octets according to the
following algorithm:
first-byte-of-pair = ASNumber / 256;
second-byte-of-pair = ASNumber & 255;

The Network Layer address of the border router
that should be used for the destination network.

Indicates the presence/absence of MULTI_EXIT_DISC
attribute for the route.

This metric is used to discriminate between multiple
exit points to an adjacent autonomous system.  The
value of this object is irrelevant if the value of
of cbgpRouteMedPresent is false(2).

Indicates the presence/absence of LOCAL_PREF
attribute for the route.

The degree of preference calculated by the local BGP4
speaker for the route. The value of this object is
irrelevant if the value of cbgpRouteLocalPrefPresent
is false(2).

Whether or not the local system has selected a less
specific route without selecting a more specific
route.

The AS number of the last BGP4 speaker that performed
route aggregation.  A value of zero (0) indicates the
absence of this attribute.

Represents the type of Network Layer address stored
in cbgpRouteAggregatorAddr.

The Network Layer address of the last BGP4 speaker
that performed route aggregation.  A value of all zeros
indicates the absence of this attribute.

An indication of whether or not this route was chosen
as the best BGP4 route.

One or more path attributes not understood by this
BGP4 speaker.  Size zero (0) indicates the absence of
such attribute(s).  Octets beyond the maximum size, if
any, are not recorded by this object.
Each path attribute is a triple <attribute type,
attribute length, attribute value> of variable length.
Attribute Type is a two-octet field that consists of
the Attribute Flags octet followed by the Attribute
Type Code octet.  If the Extended Length bit of the
Attribute Flags octet is set to 0, the third octet of
the Path Attribute contains the length of the
attribute data in octets.  If the Extended Length bit
of the Attribute Flags octet is set to 1, then the
third and the fourth octets of the path attribute
contain the length of the attribute data in octets.
The remaining octets of the Path Attribute represent
the attribute value and are interpreted according to
the Attribute Flags and the Attribute Type Code.

Number of Route prefixes received on this connnection,
which are accepted after applying filters. Possible
filters are route maps, prefix lists, distributed
lists, etc.

Counter which gets incremented when a route prefix
received on this connection is denied  or when a route
prefix is denied during soft reset of this connection
if 'soft-reconfiguration' is on . This object is
initialized to zero when the peer is  configured or
the router is rebooted

Max number of route prefixes accepted on this
connection

Counter which gets incremented when a route prefix
is advertised on this connection. This object is
initialized to zero when the peer is configured or
the router is rebooted

Counter which gets incremented when a route prefix
is suppressed from being sent on this connection. This
object is initialized to zero when the peer is
configured or the router is rebooted

Counter which gets incremented when a route prefix
is withdrawn on this connection. This object is
initialized to zero when the peer is configured or
the router is rebooted

Implementation specific error description for
bgpPeerLastErrorReceived.

The BGP peer connection previous state.

The BGP Capability Advertisement Capability Code.

Multiple instances of a given capability may be
sent by a BGP speaker.  This variable is used
to index them.

The value of the announced capability. This
MIB object value is organized as given below,
Capability : Route Refresh Capability
Null string
Capability : Multiprotocol Extensions
+----------------------------------+
| AFI(16 bits)                     |
+----------------------------------+
| SAFI (8 bits)                    |
+----------------------------------+
Capability : Graceful Restart
+----------------------------------+
| Restart Flags (4 bits)           |
+----------------------------------+
| Restart Time in seconds (12 bits)|
+----------------------------------+
| AFI(16 bits)                     |
+----------------------------------+
| SAFI (8 bits)                    |
+----------------------------------+
| Flags for Address Family (8 bits)|
+----------------------------------+
| ...                              |
+----------------------------------+
| AFI(16 bits)                     |
+----------------------------------+
| SAFI (8 bits)                    |
+----------------------------------+
| Flags for Address Family (8 bits)|
+----------------------------------+

The AFI index of the entry. An implementation
is only required to support IPv4 unicast and
VPNv4 (Value - 1) address families.

The SAFI index of the entry. An implementation
is only required to support IPv4 unicast(Value
- 1) and VPNv4( Value - 128) address families.

Implementation specific Address Family name.

Number of accepted route prefixes on this connection,
which belong to an address family.

This counter is incremented when a route prefix, which
belongs to an address family, received on this
connection is denied. It is initialized to zero when
the connection is undergone a hard reset.

Max number of route prefixes accepted for an address
family on this connection.

Prefix threshold value (%) for an address family
on this connection at which warning message stating
the prefix count is crossed the threshold or
corresponding SNMP notification is generated.

Prefix threshold value (%) for an address family
on this connection at which SNMP clear notification
is generated if prefix threshold notification is
already generated.

This counter is incremented when a route prefix,
which belongs to an address family is advertised
on this connection. It is initialized to zero when
the connection is undergone a hard reset.

This counter is incremented when a route prefix,
which belongs to an address family is suppressed
from being sent on this connection. It is
initialized to zero when the connection is undergone
a hard reset.

This counter is incremented when a route prefix,
which belongs to an address family, is withdrawn on
this connection. It is initialized to zero when the
connection is undergone a hard reset.

This table contains information about routes to
destination networks from all BGP4 peers.  Since
BGP4 can carry routes for multiple Network Layer
protocols, this table has the Address Family
Identifier(AFI) of the Network Layer protocol as the
first index. Further for a given AFI, routes carried
by BGP4 are distinguished based on Subsequent Address
Family Identifiers(SAFI).  Hence that is used as the
second index.  Conceptually there is a separate Loc-RIB
maintained by the BGP speaker for each combination of
AFI and SAFI supported by it.

BGP peer table.  This table contains,
one entry per BGP peer, information about
the connections with BGP peers.

This table contains the capabilities that are
supported by a peer. Capabilities of a peer are
received during BGP connection establishment.
Values corresponding to each received capability
are stored in this table. When a new capability
is received, this table is updated with a new
entry. When an existing capability is not received
during the latest connection establishment, the
corresponding entry is deleted from the table.

This table contains information related to
address families supported by a peer. Supported
address families of a peer are known during BGP
connection establishment. When a new supported
address family is known, this table is updated
with a new entry. When an address family is not
supported any more, corresponding entry is deleted
from the table.

This table contains prefix related information
related to address families supported by a peer.
Supported address families of a peer are known
during BGP connection establishment. When a new
supported address family is known, this table
is updated with a new entry. When an address
family is not supported any more, corresponding
entry is deleted from the table.

The BGP cbgpFsmStateChange notification is generated
for every BGP FSM state change. The bgpPeerRemoteAddr
value is attached to the notification object ID.

The cbgpBackwardTransition Event is generated when the
BGP FSM moves from a higher numbered state to a lower
numbered state. The bgpPeerRemoteAddr value is attached
to the notification object ID.

The cbgpPrfefixMaxThresholdExceeded notification is
generated when prefix count exceeds the configured
warning threshold on a session for an address
family. The bgpPeerRemoteAddr, cbgpPeerAddrFamilyAfi
and cbgpPeerAddrFamilySafi values are attached to the
notification object ID.

The cbgpPrefixThresholdClear notification is
generated when prefix count drops below the configured
clear threshold on a session for an address family once
cbgpPrefixThresholdExceeded is generated. This won't
be generated if the peer session goes down after the
generation of cbgpPrefixThresholdExceeded.
The bgpPeerRemoteAddr, cbgpPeerAddrFamilyAfi and
cbgpPeerAddrFamilySafi values are attached to the
notification object ID.

An extension to the IETF BGP4 MIB module defined in
RFC 1657.
Following is the terminology associated with Border
Gateway Protocol(BGP).
UPDATE message
UPDATE messages are used to transfer routing
information between BGP peers. An UPDATE message
is used to advertise a single feasible route to a
peer, or to withdraw multiple unfeasible routes
from service.
Adj-RIBs-In
The Adj-RIBs-In store routing information that has
been learned from inbound UPDATE messages. Their
contents represent routes that are available as an
input to the Decision Process.
Loc-RIB(BGP table)
The Loc-RIB contains the local routing information
that the BGP speaker has selected by applying its
local policies to the routing information contained
in its Adj-RIBs-In.
Adj-RIBs-Out
The Adj-RIBs-Out store the information that the
local BGP speaker has selected for advertisement to
its peers. The routing information stored in the
Adj-RIBs-Out will be carried in the local BGP
speaker's UPDATE messages and advertised to its
peers.
Path Attributes
A variable length sequence of path attributes is
present in every UPDATE. Each path attribute is a
triple <attribute type, attribute length,
attribute value> of variable length.
Network Layer Reachability Information(NLRI)
A variable length field present in UPDATE messages
which contains a list of Network Layer address
prefixes.
Address Family Identifier(AFI)
Primary identifier to indicate the type of the
Network Layer Reachability Information(NLRI) being
carried.
Subsequent Address Family Identifier(SAFI)
Secondary identifier to indicate the type of the
Network Layer Reachability Information(NLRI) being
carried.

A collection of objects providing information
about routes received by BGP speaker.

A collection of objects providing information
about routes received by BGP speaker.

The collection of  notifications related to BGP.

A collection of objects providing information
about a BGP peer.

The collection of  notifications related to BGP.