This command displays multicast path management bandwidth policy information.

Displays basic information about the service ID including service type, description, SAPs and SDPs.

This command displays basic MLD snooping information.

This command displays SPB base information.

The show qos bcg command outputs the current and historical visitation time associated with the specified BCG name.

A Burst Control Group (BCG) represents a list of queues that share the same non-scheduling PIR and CIR bucket target update interval. When a queue’s scheduled rate bursts above its PIR bucket depth, the queue is removed from its scheduling context. The system uses a BCG in order to visit the queues PIR bucket to periodically drain an appropriate amount from the bucket. When the bucket has been drained below the PIR bucket threshold, the queue is allowed back onto its scheduling context. The amount decremented from the bucket is a function of the amount of time that has elapsed since the last bucket update and the queue’s shaping rate (PIR). If the queue’s shaping rate is configured as 1 Mb/s and 1 ms has elapsed since the last bucket update, the system decrements the PIR bucket by 125 bytes. One caveat is that the bucket cannot be decremented past a depth of 0. This fact drives how the system chooses which BCG is used to manage the queue bucket update interval.

If a queue’s shaping rate is 1 Mb/s and the threshold (burst limit) is set to 10 kbytes, the maximum amount of time that can expire before the queue is updated without resulting in a negative bucket depth is 81.92 ms. This can be calculated by taking the number of bits represented by the bucket depth (10 kbytes = 10 * 1,024 * 8 = 81,920 bits) and dividing it by the rate (81,920 bits / 1,000,000 bits per second = 81.92 ms). The queue is not removed from the scheduler until the PIR bucket depth has equaled or exceeded the configured burst threshold, so the bucket is at least 10 kbytes deep. If the system visits the queue PIR bucket within 81.92 ms, the resulting decrement operation leaves the bucket. If the system takes longer than 81.92 ms, the decrement result will be greater than 10 kbytes and part of the decrement result is lost. The net result is that, because of less than timely updates, the queue will not be returned to the scheduler context fast enough and some shaping bandwidth for the queue will be lost (underrun the shaping rate).

Each FP2- and FP3-based Q-chip maintains eight BCGs, each targeting a certain queue bucket visitation time. A 1 s, 40 ms, 20 ms, 10 ms, 5 ms, 1 ms, 500 µs, and 100 µs BCG is supported. An FP4-based Q-chip has an additional four BCGs with target visitation times of 50 μs, 10 μs, 5 μs, and 1 μs. By default, queues are placed in a BCG based on shaping rate and the queue’s burst limit (PIR threshold depth) is set based on the BCG visitation time and the queue’s specified shaping rate.

When explicit burst-limit threshold values are defined for a shaping queue, the system picks an appropriate BCG based on the queue’s configured shaping rate and the explicit threshold to find a BCG with the best target visitation time that results in worst-case decrement values that are less than the configured threshold. However, when a queue is placed on a ‘faster’ BCG, more visitation resources are consumed and it is possible that the system will not meet a queue’s decrement constraints.

The show qos bcg command allows visibility into a BCG’s historic and current visitation time. The system samples the amount of time it takes each list to visit each of its associated queues once each second and stores the last 10 samples. It also keeps the longest visitation time seen since the last time the BCG statistics were cleared, the longest visitation time for the current queue-to-BCG lists associations, calculated longest visitation time based on maximum scheduling bandwidth, and the longest visitation time for an optionally defined scheduling rate.

With each sample, the system indirectly calculates the amount of scheduling bandwidth based on how many Q-chip resources were diverted from BCG visitation processing. This calculated scheduling bandwidth is used to evaluate the worst-case visitation times for each BCG. The calculated scheduling bandwidth value is stored with the longest-seen-visitation time and the longest-seen-visitation time with the current queue-to-BCG mappings. This is not applicable to an FP4-based Q-chip, so the exp-util-bw parameter is not applicable to an FP4-based Q-chip.

This command displays information for the specified HLE bridge. If no bridge is specified, then all domains are listed.

Commands in this context enter the specified HLE BD to perform tools commands.

Commands in this context dump LSP-BFD information for LDP and RSVP LSPs.

Commands in this context display bidirectional forwarding detection (BFD) information.

Commands in this context clear bidirectional forwarding (BFD) sessions and statistics.

This command displays BFD template information.

This command indicates the named BFD templates that are configured for use by LSP BFD for LDP.

This command displays BGP-related information for the service.

This command clears or resets the route damping information for received routes.

Commands in this context display BGP related information.

This command displays all the traffic statistics of the SR policy specified by its color and end-point.

This command displays BGP auto route distinguisher (RD) information.

This command displays the bgp-evpn configured parameters for a specified service, including the admin status of VXLAN, the configuration for mac-advertisement and unknown-mac-route, as well as the mac-duplication parameters. The command shows the duplicate MAC addresses that mac-duplication has detected.

This command also shows whether the ip-route-advertisement command (and the incl-host parameter) is enabled. If the service is BGP-EVPN MPLS, the command also shows the parameters corresponding to EVPN-MPLS.

This command displays all the information related to the base EVPN instance, including the base RD used for Ethernet Segment (ES) routes, the ESs or individual ES information.

Commands in this context display information about the BGP-EVPN base instance.

This command shows the information related to the EVPN global timers.

This command displays the BGP operational route-distinguishers used by all the bgp-enabled services in the system. The information can be filtered by service: VPRN, VPLS. or Epipe. The output can also be filtered to show only the relevant route-distinguisher information related to services (svc), or the EVPN Auto-Discovery routes (ad-evi-rt-set), or the system route-distinguishers (system).

This command displays BGP VPWS related information for the service.

Commands in this context clear and reset BIER entities.

Commands in this context display BIER information.

Show the configuration data for one or all OAM Performance Monitoring bin groups.

Show the list of sessions configured against one or all OAM Performance Monitoring bin groups.

This command displays the MPLS forwarding policy binding label information.

This command lists all the DHCP bindings of the local pool associated with the specified BRG. If the MAC attribute is specified, only the binding for that MAC address is displayed.

This command displays LDP bindings information.

This command displays detailed information about the Bluetooth configuration on the CPM or chassis.

Commands in this context are related to the Bluetooth interface.

Commands in this context clear and reset BGP Monitoring Protocol (BMP) station connections.

Commands in this context display BGP related information.

This command displays the Boot Option File (BOF) executed on last system boot or on the specified device.

If no device is specified, the BOF used in the last system boot displays. If the BOF has been modified since the system boot, a message displays.

This command displays an overview of active bonding contexts and the associated access connections.

When a bonding ID is specified, only information for that specific context is displayed.

This command enables the tools used for hybrid access bonding.

This command displays boot messages generated during the last system boot.

Commands in this context display operational information for connected BRGs and related hosts.

This command clears BRG data.

This command enables tools for controlling BRGs.

This command displays operational information for connected BRGs and related hosts.

This command displays BRG profile information.

This command displays L2TP MLPPP bundle statistics.

If fast reroute is enabled on an LSP and the facility method is selected, instead of creating a separate LSP for every LSP that is to be backed up, a single LSP is created which serves as a backup for a set of LSPs. Such an LSP tunnel is called a bypass tunnel.

This command displays information about the MPLS bypass tunnel.