The fabricq queue selection
mechanism is known as fabric QoS.
There are 2 queues per destination
port: one high-priority queue and one best-effort queue.
By default, internal control traffic is placed in the
high-priority queue. All other traffic is placed in the best-effort queue.
The user can configure a fabric QoS
policy that defines classification criteria for selecting high-priority or
low-priority queue. This is applied to the secure domain router (SDR)
(this may be the whole router if no individual service domain routers are
configured) and affects all fabricq ASICs in the logical router.
A maximum of
one class can be specified within
the policy,
which can be high priority class.
A class known as
class-default is
automatically created and equates to the BE
queues. The name of this
class cannot be altered. Any name may be applied to the
class that equate to the priority
.
Within the fabric QoS policy,
the only applicable actions are to assign
priority to the priority class.
Note |
The
class-map for
fabric QoS checks that all the IPv4, IPv6 and MPLS matches the conditions
configured for all the incoming packets.
The match also
supports Class of Service (CoS).
|
Fabric QoS policy class maps are restricted to matching a subset
of these classification options:
The fabricq queue selection
mechanism is known as Fabric QoS. To provide class of service to the traffic
under fabric congestion scenarios, configure Fabric QoS. The
platform-independent user interface allows you to configure an MQC policy on
the switch fabric queues. This policy is global for all line cards on the
router.