CISCO-SELECTIVE-VRF-DOWNLOAD-MIB
AI MIB Summary
The CISCO-SELECTIVE-VRF-DOWNLOAD-MIB monitors the configuration and operational status of selective VRF download policies on Cisco Provider Edge (PE) routers to track the distribution of specific VRF prefixes and MPLS labels to core-facing or customer-facing physical entities. It provides visibility into the classification of interfaces as core-facing or customer-facing and the resulting filtering of local versus remote prefixes to optimize forwarding table sizes in MPLS Layer 3 VPN environments.
This MIB module defines objects describing selective VRF download. The selective VRF download feature makes a best effort to download only those prefixes and labels to a physical entity required to forward traffic through the physical entity. The feature accomplishes this by characterizing roles for physical entities baed on their configuration.
Following terminology is introduced with selective VRF download feature:
Core Facing A physical entity which has only core facing interfaces (interfaces that connect to other Provider/Provider Edge devices).
Customer Facing A line physical entity which has one or more customer facing interfaces (interfaces that connect to Customer Edge devices in different VRFs).
Local prefix A prefix that is received from a Customer edge device connected to the router in a configured VRF context.
Remote prefix A prefix received from another Provider Edge device and is imported to a configured VRF.
See the following references for futher information:
RFC 3813 - Multiprotocol Label Switching (MPLS) Label Switching Router (LSR) Management Information base (MIB), C. Srinivasan, A. Vishwanathan, and T. Nadeau, June 2004
RFC 4382 - MPLS/BGP Layer 3 Virtual Private Network (VPN) Management Information Base, T. Nadeau & van Der Linde, February 2006
Acronyms:
VRF Virtual Routing and Forwarding VPN Virtual Private Network P Provider Core Device PE Provider Edge Device CE Customer Edge Device AFI Address Family Identifier CEF Cisco Express Forwarding
Main OID:
ciscoSelectiveVrfDownloadMIB.1.3.6.1.4.1.9.9.775
32
Objects
Active
Status
7
Dependencies
Imported Objects
Objects
32 total| Object Name |
|---|
ciscoSelectiveVrfDownloadMIBThis MIB module defines objects describing selective
VRF download. The selective VRF download feature makes
a best effort to download only those prefixes and labels
to a physical entity required to forward traffic through
the physical entity. The feature accomplishes this by
characterizing roles for physical entities baed on their
configuration.
Following terminology is introduced with selective VRF
download feature:
Core Facing A physical entity which has only core
facing interfaces (interfaces that
connect to other Provider/Provider Edge
devices).
Customer Facing A line physical entity which has one or
more customer facing interfaces
(interfaces that connect to Customer
Edge devices in different VRFs).
Local prefix A prefix that is received from a
Customer edge device connected to the
router in a configured VRF context.
Remote prefix A prefix received from another Provider
Edge device and is imported to a
configured VRF.
See the following references for futher information:
RFC 3813 - Multiprotocol Label Switching (MPLS)
Label Switching Router (LSR) Management Information
base (MIB), C. Srinivasan, A. Vishwanathan, and
T. Nadeau, June 2004
RFC 4382 - MPLS/BGP Layer 3 Virtual Private Network
(VPN) Management Information Base, T. Nadeau &
van Der Linde, February 2006
Acronyms:
VRF Virtual Routing and Forwarding
VPN Virtual Private Network
P Provider Core Device
PE Provider Edge Device
CE Customer Edge Device
AFI Address Family Identifier
CEF Cisco Express Forwarding MODULE-IDENTITY .1.3.6.1.4.1.9.9.775 |
ciscoSelectiveVrfDownloadMIBNotifs OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.0 |
csvdEntityRoleChangeNotificationThis notification is sent when the role of the physical
entity for a given address family changes.
csvdStateEntityRole indicates the role the entity is
transitioning to. NOTIFICATION-TYPE .1.3.6.1.4.1.9.9.775.0.1 |
ciscoSelectiveVrfDownloadMIBObjects OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.1 |
csvdAdminEnableThis object specifies the desired state of selective
VRF download feature. When a managed system initializes,
it starts with csvdAdminEnable in the true(1) state. As a
result of either explicit management action or per
configuration information retained by the managed system,
csvdAdminEnable is then changed to false(2) state (or
remains in the true(1) state.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.1 |
csvdOperEnableThis object indicates the current operational state of
selective VRF download feature. If csvdAdminEnable is
changed then csvdOperEnable should change to the same
value after the external action is triggered. As an
external action implementations may require router reload
or switchover of the route-processor for the change to
take effect.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.2 |
csvdEntityRoleChangeNotificationEnableThis object specifies whether the system generates the
csvdEntityRoleChangeNotification.rw TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.3 |
csvdCounterDiscontinuityTimeThis object indicates the value of sysUpTime on the most
recent occasion at which selective VRF download counters
suffered a discontinuity. The relevant counters are the
instances of any Counter32 objects contained in
csvdStateTable. If no such discontinuities have occurred
since the last re-initialization of the local management
subsystem, then this object contains a zero value.ro TimeStamp (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.4 |
csvdStateTableThis table lists the state relating to the selective VRF
download feature for each physical entity capable of
forwarding packets. This table has an expansion dependent
relationship on the entPhysicalTable, containing zero or
more rows each row in the entPhysicalEntity. If the
physical entity is capable of forwarding packets, it
contains a row for each address family it supports. SEQUENCE OF CsvdStateEntry .1.3.6.1.4.1.9.9.775.1.5 |
csvdStateEntryAn entry describes state relating to the selective VRF
download feature. The system creates an entry each for
each supported AFI when a new physical entity capable of
forwarding packets becomes operational. The system
destroys all the entries associated with the physical
entity when it goes away. CsvdStateEntry .1.3.6.1.4.1.9.9.775.1.5.1 |
csvdStateAFIThis object indicates the AFI for which the row
pertains. AddressFamilyNumbers (IANA-ADDRESS-FAMILY-NUMBERS-MIB) .1.3.6.1.4.1.9.9.775.1.5.1.1 |
csvdStateEntityRoleThis object specifies the selective VRF download role of
the physical entity. It can be updated based on interface
to VRF association change or ip-address assignment to an
interface belonging to the physical entity.
For example:-
- if no interfaces on a physical entity have IPv4 address
configured, then it would be in Customer Facing
Role for IPv4 address family.
- if no interfaces on a physical entity have IPv6 address
configured, then it would be in Not Interested
Role for IPv6 address family.
- now if the user adds an IPv4 address to an interface
in default VRF, then the physical entity would turn
Core-Facing for IPv4 AFI.
- if the user would have added this interface in a
named VRF, then the physical entity would have remained in
Customer-Facing for IPv4 AFI.
- if there are interfaces configured in both default
VRF and named VRFs then the physical entity would turn in
to Standard Role.rw SVDEntityRole .1.3.6.1.4.1.9.9.775.1.5.1.2 |
csvdStateEntityRoleLastChangeThis object indicates the value of sysUpTime the last
time the corresponding instance of csvdStateEntityRole
changed.ro TimeStamp (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.5.1.3 |
csvdStateEntityRoleTransitionsThis object indicates the number of times the
corresponding instance of csvdStateEntityRole has
changed. Discontinuities in the value of this counter
can occur at re-initialization of the management system,
and at other times as indicated by the value of the
corresponding instance of csvdCounterDiscontinuityTime.ro Counter32 .1.3.6.1.4.1.9.9.775.1.5.1.4 |
csvdRoleHistory OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.1.6 |
csvdRoleHistorySizeThis object specifies the maximum number of rows the
csvdRoleHistoryTable can contain at any given time. If
the role changes and the csvdRoleHistoryTable already
contains a number of rows equal to the value of this
object, then it destroys the oldest row before creating
a new one.rw Unsigned32 .1.3.6.1.4.1.9.9.775.1.6.1 |
csvdRoleHistoryLastIndexThis object indicates the value of csvdRoleHistoryIndex
corresponding to the last row created in the
csvdRoleHistoryTable.ro Unsigned32 .1.3.6.1.4.1.9.9.775.1.6.2 |
csvdRoleHistoryTableThis table lists the role change history per
address family (ipv4 and ipv6) for each physical entity
capable of forwarding packets. This table has an
expansion dependant relationship on csvdStateTable,
containing zero or more rows for each row in
csvdStateTable. SEQUENCE OF CsvdRoleHistoryEntry .1.3.6.1.4.1.9.9.775.1.6.3 |
csvdRoleHistoryEntryAn entry describes a change in the role of a physical
entity. CsvdRoleHistoryEntry .1.3.6.1.4.1.9.9.775.1.6.3.1 |
csvdRoleHistoryIndexThis object indicates an arbitrary integer-value
uniquely identifying the entry. Unsigned32 .1.3.6.1.4.1.9.9.775.1.6.3.1.1 |
csvdRoleHistoryRoleThis object indicates the selective VRF download role for
a given history index.ro SVDEntityRole .1.3.6.1.4.1.9.9.775.1.6.3.1.2 |
csvdRoleHistoryRoleChangeTimeThis object indicates the value of sysUpTime when entry
was created.ro TimeStamp (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.6.3.1.3 |
csvdVrfTableThis table lists VRF tables selectively downloaded to
each physical entity capable of forwarding packets. This
table has an expansion dependent relationship on the
csvdStateTable, containing zero or more rows for each
address family supported by each physical entity capable
of forwarding packets. SEQUENCE OF CsvdVrfEntry .1.3.6.1.4.1.9.9.775.1.7 |
csvdVrfEntryAn entry describes a VRF selectively downloaded to a
physical entity capable of forwarding packets. The
system creates an entry when the selective VRF
download feature determines that a physical entity
requires a VRF. The system destroys an entry when the
selective VRF download feature determines that a
physical entity does not require a VRF. CsvdVrfEntry .1.3.6.1.4.1.9.9.775.1.7.1 |
csvdVrfNameThis object indicates the name of the VRF. MplsL3VpnName (MPLS-L3VPN-STD-MIB) .1.3.6.1.4.1.9.9.775.1.7.1.1 |
csvdPrefixCountThis object indicates the total number of prefixes
downloaded from the VRF table. The value of this object
may not equal to the sum of the values of the
corresponding instance of csvdLocalPrefixCount and
csvdRemotePrefixCount, as the VRF table may have special
internal prefixes to support the CEF implementation.ro Gauge32 .1.3.6.1.4.1.9.9.775.1.7.1.2 |
csvdLocalPrefixCountThis object indicates the number of local prefixes
downloaded from the VRF table.ro Gauge32 .1.3.6.1.4.1.9.9.775.1.7.1.3 |
csvdRemotePrefixCountThis object indicates the number of remote prefixes
downloaded from the VRF table.ro Gauge32 .1.3.6.1.4.1.9.9.775.1.7.1.4 |
csvdTableConvergedFlagThis object indicates whether the VRF table has
converged. Once all the prefixes for the VRF table have
been updated and downloaded, convergence is complete.
The flag is set to false when the VRF is created
initially or selectively downloaded to the physical
entity. Once the initial download of all the prefixes
for the VRF to the physical entity completes, the flag
is set to true.ro TruthValue (SNMPv2-TC) .1.3.6.1.4.1.9.9.775.1.7.1.5 |
ciscoSelectiveVrfDownloadMIBConform OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.2 |
csvdMIBCompliances OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.2.1 |
csvdMIBGroups OBJECT IDENTIFIER .1.3.6.1.4.1.9.9.775.2.2 |