CISCO-IP-URPF-MIB

CISCO-IP-URPF-MIB Download

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Unicast Reverse Path Forwarding (URPF) is a function that checks the validity of the source address of IP packets received on an interface. This in an attempt to prevent Denial of Service attacks based on IP address spoofing. URPF checks validity of a source address by determining whether the packet would be successfully routed as a destination address. Based on configuration, the check made can be for existence of any route for the address, or more strictly for a route out the interface on which the packet was received by the device. When a violating packet is detected, it can be dropped. This MIB allows detection of spoofing events.

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OID list for CISCO-IP-URPF-MIB

cipUrpfDropRateWindow
The window of time in the recent past over which the drop count used in the drop rate computation is collected. This global value applies for the computation of all URPF rates, global and per-interface. Once the period over which computations have been pe ...
cipUrpfComputeInterval
The time between rate computations. This global value applies for the computation of all URPF rates, global and per-interface. When the value of cipUrpfComputeInterval is changed, the interval in-progress proceeds as though the value had not changed. The ...
cipUrpfDropNotifyHoldDownTime
The minimum time between issuance of cipUrpfIfDropRateNotify notifications for a particular interface and packet forwarding type. Notifications are generated for each interface and packet forwarding type that exceeds the drop-rate. When a Notify is sent b ...
cipUrpfTable
This table contains summary information for the managed device on URPF dropping.
cipUrpfEntry
If the managed device supports URPF dropping, a row exists for each IP version type (v4 and v6). A row contains summary information on URPF dropping over the entire managed device.
cipUrpfIpVersion
Specifies the version of IP forwarding on an interface to which the table row URPF counts, rates, and configuration apply.
cipUrpfDrops
Sum of dropped IP version cipUrpfIpVersion packets failing a URPF check. This value is the sum of drops of packets received on all interfaces of the managed device.
cipUrpfDropRate
The rate of packet drops of IP version cipUrpfIpVersion packets due to URPF for the managed device. The per-interface drop rate notification is issued on rates exceeding a limit (rising rate). This dropping may indicate an security attack on the network. ...
cipUrpfIfMonTable
This table contains information on URPF dropping on an interface.
cipUrpfIfMonEntry
If IPv4 packet forwarding is configured on an interface, and is configured to perform URPF checking, a row appears in this table with indices [ifIndex][ipv4]. If IPv4 packet forwarding is deconfigured, or URPF checking is deconfigured, the row disappears. ...
cipUrpfIfIpVersion
Specifies the version of IP forwarding on an interface to which the table row URPF counts, rates, and configuration apply.
cipUrpfIfDrops
The number of IP packets of version cipUrpfIfIpVersion failing the URPF check and dropped by the managed device on a particular interface. Discontinuities in the value of this variable can occur at re-initialization of the management system, and at other ...
cipUrpfIfSuppressedDrops
The number of IP packets of version cipUrpfIfIpVersion failing the URPF check but given a reprieve and not dropped by the managed device. Depending on the device configuration and capabilities, the following cases may cause incrementing of the counter: - ...
cipUrpfIfDropRate
The rate of packet drops of IP version cipUrpfIfIpVersion packets due to URPF on the interface. This object is the average rate of dropping over the most recent interval of time. The rate is computed by dividing the number of packets dropped over an inter ...
cipUrpfIfDiscontinuityTime
The value of sysUpTime on the most recent occasion at which this interface's counters suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this object contains a valu ...
cipUrpfIfConfTable
This table contains statistics information on URPF on an interface.
cipUrpfIfConfEntry
A row exists in this table if a row exists in cipUrpfIfMonTable.
cipUrpfIfDropRateNotifyEnable
This object specifies whether the system produces the cipUrpfIfDropRateNotify notification as a result of URPF dropping of version cipUrpfIfIpVersion IP packets on this interface. A false value prevents such notifications from being generated by this syst ...
cipUrpfIfNotifyDropRateThreshold
When the calculated rate of URPF packet drops (cipUrpfIfDropRate) meets or exceeds the value specified by this object, a cipUrpfIfDropRateNotify notification is sent if cipUrpfIfDropRateNotifyEnable is set to true, and no such notification for the IP vers ...
cipUrpfIfNotifyDrHoldDownReset
Setting this object to true causes the five-minute hold-down timer for emitting URPF drop rate notifications for IP version cipUrpfIfIpVersion on the interface to be short-circuited. If a notification is due and would be emitted for the interface if the ...
cipUrpfIfCheckStrict
Interface configuration indicating the strictness of the reachability check performed on the interface. - strict: check that source addr is reachable via the interface it came in on. - loose : check that source addr is reachable via some interface on the ...
cipUrpfIfWhichRouteTableID
Interface configuration indicating the routing table consulted for the reachability check: - default: the non-private routing table for of the managed system. - vrf : a particular VPN routing table.
cipUrpfIfVrfName
If the value of cipUrpfIfWhichRouteTableID is 'vrf', the name of the VRF Table. Otherwise a zero-length string.
cipUrpfVrfTable
This table enables indexing URPF drop statistics by Virtual Routing and Forwarding instances.
cipUrpfVrfEntry
An entry exists for a VRF if and only if the VRF is associated with an interface that is configured to perform IP URPF checking using the routing table for that VRF.
cipUrpfVrfName
This field is used to specify the VRF Table name.
cipUrpfVrfIfTable
This table contains statistics information for interfaces performing URPF using VRF table to determine reachability.
cipUrpfVrfIfEntry
An entry exists for a VRF and interface if and only if the VRF associated with the interface is configured to perform IP URPF checking using the routing table for the VRF.
cipUrpfVrfIfDrops
The number of packets failing the URPF check for a VRF on the interface and dropped by the managed device. Discontinuities in the value of this variable can occur at re-initialization of the management system, and at other times as indicated by the values ...
cipUrpfVrfIfDiscontinuityTime
The value of sysUpTime on the most recent occasion at which the URPF counters for this VRF on this interface suffered a discontinuity. If no such discontinuities have occurred since the last re-initialization of the local management subsystem, then this ...
ciscoIpUrpfMIBMainObjectGroup
The collection of common counter objects, those needed by other objects, and the common interface table.
ciscoIpUrpfMIBVrfObjectGroup
The collection of objects needed to index by VRF.

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