Chapter 21
| Data Center Bridging Commands
Congestion Notification Commands
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cn cnpv defense-mode
(Global Configuration)
Use this command to configure the defense mode for a CNPV, determining
whether CN is enabled or not, and if enabled, whether the port remarks the CNPV
to a non-CNPV value on input, and whether the port removes CN-tags on output.
Use the no form to restore the default settings.
Syntax
cn cnpv cnpv-priority defense-mode {auto | disabled | edge | interior |
interior-ready}
no cn cnpv cnpv-priority defense-mode
cnpv-priority - CN priority value. (Range: 0-7)
auto - Defense mode and alternate priority is chosen automatically as
determined by the LLDP Congestion Notification TLV.
disabled - CN capability is administratively disabled.
edge - CNPV is remapped to non-CNPV and CN-TAG is removed.
interior - Priority remapping is inhibited and CN-TAG is removed.
interior-ready - Priority remapping is inhibited and CN-TAG is retained.
Default Setting
auto
Command Mode
Global Configuration
Command Usage
â—† Under the auto option, the defense mode is determined by the LLDP CN TLV,
and may be set to edge, interior, or interior-ready.
The alternate priority is also determined by the LLDP CN TLV. If CN is enabled
and the CND defense mode of the port is Edge, then the CNPV to which an
incoming frame can be mapped is the next lower priority value which is not
mapped as a CNPV, or the next higher non-CNPV, if all lower values are CNPVs.
â—† Under the disabled option, the congestion notification capability is
administratively disabled for this priority value and port. The priority
regeneration table controls the remapping of input frames on this port to or
from this priority. CN-TAGs are not stripped by the switch.
â—† Under the edge option, on this port and for this CNPV, the priority parameters
of input frames are remapped to an alternate (non-CNPV) value, and no priority
value is remapped to this CNPV regardless of the priority regeneration table.
CN-TAGs are removed from frames before being output by the switch.
â—† Under the interior option, on this port and for this CNPV, the priority
parameters of input frames are not remapped to another value, and no priority
value is remapped to this CNPV, regardless of the priority regeneration table.
CN-TAGs are removed from frames before being output by the switch.
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