
DXS-3600 Series Layer 3 Managed 10Gigabit Ethernet Switch CLI Reference Guide
1119
Congestion Notification
TLV.
comp
admin
admin-defense-mode
(global)
alternate-priority
(global)
comp
auto
Controlled by the LLDP
Congestion Notification
TLV.
Controlled automatically (*).
(*) The rule to automatically determine the alternate priority: An integer indicating the next lower priority
value than this CNPV that is not a CNPV in an end station or bridge component, or the next higher non-
CNPV, if all lower values are CNPVs.
For example, to administratively deactivate the CNPV on the specified interface:
•
Use the
qcn cnpv interface configuration
command with the optional keyword
defense-mode-
choice
to set the defense mode choice to admin.
•
Use the optional keyword
admin-defense-mode
with the argument
disable
.
When a queue ID is used for a CNPV the switch will attach a Congestion Point (CP) on the corresponding
outbound queue for each port. When you set the defense mode to disabled for a CNPV on an interface, it
probably causes the congestion detection at the corresponding outbound queue on this interface be
disabled. In other words, the switch will disable the interface’s corresponding CP function when this
interface has no active (non-disabled) CNPV mapped to that queue ID. For example, if a CNPV is only
enabled on a single interface and no other active (non-disabled) CNPVs use the same queue ID, it
implies the corresponding CPs on other egress ports are inactive then no CNMs can be triggered for the
incoming traffic from this single enabled interface. To make the Congestion Notification Domain (CND)
work correctly you need enable a CNPV on more than one interface.
The command only takes effect when the QCN is enabled globally.
Example
This example shows how to administratively assign the defense mode to interior for CNPV 2 at interface
Ethernet 1/0/1.
Switch# configure terminal
Switch(config)# interface ethernet 1/0/1
Switch(config-if)# qcn cnpv 2 defense-mode-choice admin
Switch(config-if)# qcn cnpv 2 admin-defense-mode interior
Switch(config-if)#
88-6 qcn cp
This command is used to configure the settings of the Congestion Point (CP).
qcn cp CP-QID {set-point QSP-VALUE | weight WEIGHT-VALUE | sample-base SAMPLE-BASE-
VALUE | min-header-octets MIN-HEADER-VALUE}
Parameters
CP-QID
Specifies the queue ID that the Congestion Point (CP) is attached to.
The relation between the queue ID and CP is one-to-one. The CP is
specified by the queue ID to which the CP is attached to.
set-point QSP-VALUE
Specifies the set point (
cpQSp
) in octets for the queue managed by
this CP. Congestion Notification Messages are transmitted to the
sources of the frames queued in this CP's queue in order to keep the
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