Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 962)

932 Multi-Service IronWare Switching Configuration Guide
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BFD for RSVP-TE LSP
25
.Displaying summary neighbor information
Support for BFD for BGP neighbors is highlighted in the bold text in the following output for the
show ip bgp neighbors command.
Neighbor AS4 Capability Negotiation:
As-path attribute count: 2
Outbound Policy Group:
ID: 1, Use Count: 3
BFD:Enabled,BFDSessionState:UP,Multihop:Yes
LastBGP-BFDEvent:RX:Up,BGP-BFDError:No Error
NegotiatedTime(msec):Tx:1000000,Rx:1000000,BFDHoldTime:3000000
HoldOverTime(sec) Configured:22,Current:0,DownCount:0
TCP Connection state: ESTABLISHED, flags:00000044 (0,0)
Maximum segment size: 1460
BFD for RSVP-TE LSP
BFD provides a mechanism to detect data plane failure for MPLS LSP in the order of sub-second.
Unlike MPLS LSP ping where MPLS control plane can be verified against the data plane, BFD is
used only to detect data plane failure. There are a couple advantages in using BFD instead of LSP
ping for MPLS data plane failure detection. BFD provides a faster failure detection mechanism
because it does not require control plane verification. BFD can also be used to detect faults for a
large number of LSPs without manual trigger for each LSP the way LSP ping does.
BFD session for RSVP LSP is very similar to the BFD session set up for ISIS and OSPF with the
following differences:
• MPLS BFD session is bootstrapped using LSP ping.
MinRxInterval The interval in milliseconds that the neighbor device waits to receive a
BFD message from the peer on this remote port.
Multiplier The number of times that the remote neighbor device will wait for the
MinRxInterval time on this port before it determines that the peer device
is non-operational.
Stats: Rx Total number of BFD control messages received from the remote peer.
Stats: Tx Total number of BFD control messages sent to the remote peer.
Stats: SessionUpCount The number of times the session has transitioned to the UP state.
Stats: SysUpTime The amount of time that the system has been up.
Session Uptime The amount of time the session has been in the UP state.
LastSessionDownTimestamp The system time at which the session last transitioned from the UP state
to some other state.
Physical Port The physical port on which the peer is known.
Vlan Id The VLAN ID of the VLAN on which the physical port is resident.
TABLE 129 Display of BFD neighbor detail information (Continued)
This field... Displays...