>
    Reference: BFD Details
    Focus
    Download PDF
    Focus
    1. Home
    2. PAN-OS
    3. BFD
    4. Reference: BFD Details
    Download PDF

    Reference: BFD Details

    Table of Contents

    Reference: BFD Details

    Descriptions of BFD details.
    Where Can I Use This?What Do I Need?
    • NGFW (Managed by PAN-OS or Panorama)
    To see the following BFD information for a virtual router, refer to Step 12 of Configure BFD, View BFD summary and details.
    Name
    Value (Example)
    Description
    Session ID
    1
    ID number of the BFD session.
    Interface
    ethernet1/12
    Interface you selected where BFD is running.
    Protocol
    STATIC(IPV4) OSPF
    Static route (IP address family of static route) and/or dynamic routing protocol that is running BFD on the interface.
    Local IP Address
    10.55.55.2
    IP address of interface.
    Neighbor IP Address
    10.55.55.1
    IP address of BFD neighbor.
    BFD Profile
    default *(This BFD session has multiple BFD profiles. Lowest ‘Desired Minimum Tx Interval (ms)’ is used to select the effective profile.)
    Name of BFD profile applied to the interface.
    Because the sample interface has both a static route and OSPF running BFD with different profiles, the firewall uses the profile with the lowest Desired Minimum Tx Interval. In this example, the profile used is the default profile.
    State (local/remote)
    up/up
    BFD states of the local and remote BFD peers. Possible states are admin down, down, init, and up.
    Up Time
    2h 36m 21s 419ms
    Length of time BFD has been up (hours, minutes, seconds, and milliseconds).
    Discriminator (local/remote)
    1391591427/1
    Discriminators for local and remote BFD peers.
    Mode
    Active
    Mode in which BFD is configured on the interface: Active or Passive.
    Demand Mode
    Disabled
    PAN-OS does not support BFD Demand Mode, so it is always in Disabled state.
    Multihop
    Disabled
    BFD multihop: Enabled or Disabled.
    Multihop TTL
    TTL of multihop; range is 1-254. Field is empty if Multihop is disabled.
    Local Diag Code
    0 (No Diagnostic)
    Diagnostic codes indicating the reason for the local system’s last change in state:
    0—No Diagnostic
    1—Control Detection Time Expired
    2—Echo Function Failed
    3—Neighbor Signaled Session Down
    4—Forwarding Plane Reset
    5—Path Down
    6—Concatenated Path Down
    7—Administratively Down
    8—Reverse Concatenated Path Down
    Last Received Remote Diag Code
    0 (No Diagnostic)
    Diagnostic code last received from BFD peer.
    Transmit Hold Time
    0ms
    Hold time (in milliseconds) after a link comes up before BFD transmits BFD control packets. A hold time of 0ms means to transmit immediately. Range is 0-120000ms.
    Received Min Rx Interval
    1000ms
    Minimum Rx interval received from the peer; the interval at which the BFD peer can receive control packets. Maximum is 2000ms.
    Negotiated Transmit Interval
    1000ms
    Transmit interval (in milliseconds) that the BFD peers have agreed to send BFD control packets to each other. Maximum is 2000ms.
    Received Multiplier
    3
    Detection time multiplier value received from the BFD peer. The Transmit Time multiplied by the Multiplier equals the detection time. If BFD does not receive a BFD control packet from its peer before the detection time expires, a failure has occurred. Range is 2-50.
    Detect Time (exceeded)
    3000ms (0)
    Calculated detection time (Negotiated Transmit Interval multiplied by Multiplier) and the number of milliseconds the detection time is exceeded.
    Tx Control Packets (last)
    9383 (420ms ago)
    Number of BFD control packets transmitted (and length of time since BFD transmitted the most recent control packet).
    Rx Control Packets (last)
    9384 (407ms ago)
    Number of BFD control packets received (and length of time since BFD received the most recent control packet).
    Agent Data Plane
    Slot 1 - DP 0
    On PA-7000 Series firewalls, the dataplane CPU that is assigned to handle packets for this BFD session.
    Errors
    0
    Number of BFD errors.
    Last Packet Causing State Change
    Version
    1
    BFD version.
    Poll Bit
    0
    BFD poll bit; 0 indicates not set.
    Desired Min Tx Interval
    1000ms
    Desired minimum transmit interval of last packet causing state change.
    Required Min Rx Interval
    1000ms
    Required minimum receive interval of last packet causing state change.
    Detect Multiplier
    3
    Detect Multiplier of last packet causing state change.
    My Discriminator
    1
    Remote discriminator. A discriminator is a unique, nonzero value the peers use to distinguish multiple BFD sessions between them.
    Your Discriminator
    1391591427
    Local discriminator. A discriminator is a unique, nonzero value the peers use to distinguish multiple BFD sessions between them.
    Diagnostic Code
    0 (No Diagnostic)
    Diagnostic code of last packet causing state change.
    Length
    24
    Length of BFD control packet in bytes.
    Demand Bit
    0
    PAN-OS does not support BFD Demand mode, so Demand Bit is always set to 0 (disabled).
    Final Bit
    0
    PAN-OS does not support the Poll Sequence, so Final Bit is always set to 0 (disabled).
    Multipoint Bit
    0
    This bit is reserved for future point-to-multipoint extensions to BFD. It must be zero on both transmit and receipt.
    Control Plane Independent Bit
    1
    • If set to 1, the transmitting system’s BFD implementation does not share fate with its control plane (i.e., BFD is implemented in the forwarding plane and can continue to function through disruptions in the control plane). In PAN-OS, this bit is always set to 1.
    • If set to 0, the transmitting system’s BFD implementation shares fate with its control plane.
    Authentication Present Bit
    0
    PAN-OS does not support BFD Authentication, so the Authentication Present Bit is always set to 0.
    Required Min Echo Rx Interval
    0ms
    PAN-OS does not support the BFD Echo function, so this will always be 0ms.

    © 2025 Palo Alto Networks, Inc. All rights reserved.