This Article explains the cut-through switching mode support with QFX5200 switches
Under forwarding-options configuration, no cut-through option available with QFX5200 switches.
snap
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admin@qfx5200# set forwarding-options ?
Possible completions:
> access-security Access security configuration
> analyzer Analyzer options
+ apply-groups Groups from which to inherit configuration data
+ apply-groups-except Don't inherit configuration data from these groups
> dhcp-relay Dynamic Host Configuration Protocol relay configuration
> enhance-fp-thread Set fpc fast thread options
> enhanced-hash-key Select data used in the hash key for Enhanced IP Forwarding Engines
> evpn-vxlan EVPN VXLAN configurations
> explicit-null-cos Configure to use MPLS explicit null exp for COS classification
> family Protocol family
> helpers Port forwarding configuration
> ip-options-protocol-queue IP Options protocol logical queue parameters
> local-bias Turn on local bias functionality
mpls-tunnel-extend Extend MPLS Tunnel table usage. This config will restart PFE
> multicast Multicast resolve and mismatch rate
> multicast-replication Set mode of multicast replication
no-hierarchical-ecmp Disable hierarchical ecmp. This will restart PFE
ospf2-flow-check-disable To disable ospf flow check
> pfe-sensor Enable sensor for pfe resources
port-mac-in-tcam Enable Port+mac knob in my_station_tcam. This will restart PFE
> port-mirroring Configure port mirroring of traffic
> rpf-loose-mode-discard Configure rpf loose mode behavior
> sampling Statistical traffic sampling options
> satellite Satellite forwarding options
> sflow Sflow related
> storm-control Storm control config
> storm-control-profiles Storm control profile for this instance
> tunnels Tunnel port profile
vrf-fallback Enable vrf-fallback forwarding. This will restart PFE
vrrp-flow-check-disable To disable vrrp flow check
vxlan-disable-copy-tos-decap Disable copy of TOS bits from Outer IP to Inner IP at VxLAN Tunnel Decap
vxlan-disable-copy-tos-encap Disable copy of TOS bits from Outer IP to Inner IP at VxLAN Tunnel Encap
{master:0}[edit]
admin@qfx5200# set forwarding-options
Cut-through swithcing mode is not supported with QFX5200 platform. Though the comand is not visible under forwarding-options, it can be configured as it is not supported there is a warning message to indicate the unsupportability of this mode.
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labroot@jtac-qfx5200-32c-32q-r2055# show | compare
[edit]
+ forwarding-options {
+ cut-through;
+ }
labroot@jtac-qfx5200-32c-32q-r2055# commit check
configuration check succeeds
labroot@jtac-qfx5200-32c-32q-r2055# commit
commit complete
labroot@jtac-qfx5200-32c-32q-r2055# show forwarding-options
##
## Warning: statement ignored: unsupported platform (qfx5200-32c-32q)
cut-through;