Bidirectional Forwarding Detection Over Logical Bundle; Configuration - Cisco NCS 5500 Series Configuration Manuals

Bidirectional Forwarding Detection over Logical Bundle

[Jan
[Jan
Offload history:
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desired_min_tx_interval 10000, required_min_rx_interval 10000, Last punted pkt
[Jan
desired_min_tx_interval 10000, required_min_rx_interval 10000, Last punted pkt
[Jan
desired_min_tx_interval 10000, required_min_rx_interval 10000, Last punted pkt
[Jan
desired_min_tx_interval 10000, required_min_rx_interval 10000, Last punted pkt
Rx Counters and Timestamps :
Async valid packets received: count 5280
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Async valid packets while session is not in Up state: count 3
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Bidirectional Forwarding Detection over Logical Bundle
Bidirectional Forwarding Detection (BFD) over Logical Bundle (BLB) feature implements and deploys BFD
over bundle VLAN interfaces.
BLB feature is different from the BFD over Bundle (BoB) feature which runs on non-VLAN bundle interfaces.
These two features are distinct from each other. Do not configure these two features at the same time on the
same bundle.
Note
Routing protocols are BFD clients for the BLB feature. Hence if BFD session goes down, it will bring down
the routing session.
Restriction
BLB sessions are restricted to an interval of 300 milliseconds and a multiplier of 3. Though you can configure
more aggressive parameters, Cisco does not recommend it.

Configuration

Perform the following tasks to configure the BLB feature.
• Create VLAN sub-interface under bundle interface
• Enable BFD on a static route
• Enable BFD on IS-IS
• Enable BFD for OSPF on an interface
Routing Configuration Guide for Cisco NCS 5500 Series Routers, IOS XR Release 6.3.x
222
state down', from DOWN to INIT with current diag being None
4 03:00:16.509] Session (v1) state change, triggered by event 'Session
create', from Unknown to DOWN with current diag being None
4 03:00:16.509] Flag cleared: session creation is in-progress, currently
set flags (0x80040)
4 03:06:42.013] Packet punted to sw: Packet word0 : (0x20c80218),
required_min_rx_interval 10000
4 03:06:42.003] Packet punted to sw: Packet word0 : (0x20d80218),
required_min_rx_interval 10000
4 03:06:41.989] Packet punted to sw: Packet word0 : (0x20c80218),
required_min_rx_interval 10000
4 03:06:41.980] Packet punted to sw: Packet word0 : (0x20d80218),
required_min_rx_interval 10000
4 03:06:42.013] [Jan
4 03:00:19.272] [Jan
4 03:06:42.003] [Jan 4 03:06:41.989]
4 03:00:18.030] [Jan 4 03:00:16.851]
Implementing BFD