[j-nsp] Cut-through forwarding statistics on QFX5100

[Brant Ian Stevens]

It is readily available in 17.2; not sure about earlier versions.

branto at host# set forwarding-options ?
Possible completions:
 > access-security      Access security configuration
 > accounting           Configure accounting of traffic
 > analyzer             Analyzer options
+ apply-groups         Groups from which to inherit configuration data
+ apply-groups-except  Don't inherit configuration data from these groups
   cut-through          Enable cut-through forwarding
 > dhcp-relay           Dynamic Host Configuration Protocol relay 
configuration
 > enhanced-hash-key    Select data used in the hash key for Enhanced IP 
Forwarding Engines
 > family               Protocol family
 > hash-key             Select data used in the hash key
 > helpers              Port forwarding configuration
 > ip-options-protocol-queue  IP Options protocol logical queue parameters
 > load-balance         Configure load-balancing attributes on the 
forwarding path
 > local-bias           Turn on local bias functionality
 > port-mirroring       Configure port mirroring of traffic
 > storm-control-profiles  Storm control profile for this instance
   vrf-fallback         Enable vrf-fallback forwarding. This will 
restart PFE

> Aaron Gould <mailto:aaron1 at gvtc.com>
> June 22, 2017 at 10:21 AM
> Sorry I don't have an answer... but interestingly, I see this as a hidden command on the cousin ACX5048... is it hidden in the QFX5100 or in plain view using the ? after set forwarding-option ?
>
> I haven't used it nor committed it further so I don't know of its functionality on this ACX5048
>
> {master:0}[edit]
> agould at eng-lab-5048-1# run show version
> fpc0:
> --------------------------------------------------------------------------
> Hostname: eng-lab-5048-1
> Model: acx5048
> Junos: 15.1X54-D20.7
>
> .......
>
> agould at eng-lab-5048-1# set forwarding-options ?
> Possible completions:
>> accounting           Configure accounting of traffic
> + 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
>> family               Protocol family
>    fast-reroute-priority  Fast-reroute repair priority
>> hash-key             Select data used in the hash key
>> helpers              Port forwarding configuration
>    no-load-balance-label-capability  Disable load balance label capability
>> port-mirroring       Configure port mirroring of traffic
>> sampling             Statistical traffic sampling options
>> storm-control-profiles  Storm control profile for this instance
> {master:0}[edit]
> agould at eng-lab-5048-1# set forwarding-options cut-through
>
> {master:0}[edit]
> agould at eng-lab-5048-1# show | compare
> [edit]
> +  forwarding-options {
> +      cut-through;
> +  }
>
>
> - Aaron Gould
>
>
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp
> Thomas Bellman <mailto:bellman at nsc.liu.se>
> June 21, 2017 at 6:28 PM
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> We have a QFX5100 on which we have enabled cut-throug forwarding
> ('set forwarding-options cut-through'). Now I am curious about
> how effective that is. Is there any statistics one can dig out
> about how often the switch is able to do cut-through, and how
> often it has to fall back to store-and-forward? I haven't found
> anything in 'show interfaces extensive', nor any other promising
> 'show' command.
>
> The dream would of course be to get counters for every combination
> of ingress and egress interface, but I would be happy to get just
> counters for just ingress or egress, or even just a total for the
> entire system.
>
> The switch is running Junos 17.2R1 if that matters.
>
>
> - -- 
> Thomas Bellman, National Supercomputer Centre, Linköping Univ., Sweden
> "We don't understand the software, and ! bellman @ nsc . liu . se
> sometimes we don't understand the hardware, !
> but we can *see* the blinking lights!" ! Make Love -- Nicht Wahr!
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1
>
> iQIcBAEBAgAGBQJZSvMeAAoJEGqUdKqa3HTsuwUP/3YluYW/rUn9igIAd4Jvv/HI
> g+Dnr6WuHejv9lKzVaZnsf8XuJkEzXpsVuEzGcBOyn10a77axltEhVwp/pUdPLM6
> /tr04Z0P3at51sQUP3SCot+CxPhfVkJ4TB9j5HET5zouwRBTDFlvPhpRoWStaGjz
> VV/5AlQDAD3xrw49ypFiJ+FQ122hj1Xz6EVzioDPf/zbtg86c8mxkhZPiaS+H2jE
> Pf3H0hTDtL7YZSKlmevX0u2jiNJFALutgkvCNB8+vZjO2eYdjGEtdsrz4Nxw2Mkv
> 46Q8niW75jOovLmnkQj1iMyaG9DljXf76zl1jQyXlKWX97+pV88OQPqYWZOf3rUZ
> dNZyyy+7kF0iMLOG1u/F8ufTm0PqXgbWtx4EaSjj7kwUNCxlv/IvuBnxsB4cv8dH
> vzsy4hxpRkMMyqmHuXrPIdj24Dk9+vpxJgsZ/X6GsVkrTwrkghBTCTxovhuQq7RM
> ZMN4rIVGwSBYE8tKFcM6Rfs/nHhfggvwBKGs7OuKlMoGia5F5bwTZTIRQkiGoWuY
> ipLXVhk713eecn/Ftpr0TYA43H+8LlOMgFWhO+u0hcS0y2wi++lHvDFRxamsxz9G
> by7sp6DH3twx7I7fT/8zFL+tSD7scIeF8g7f91oW3kX8KV8WJ6YnuLyfSUDHSf+y
> n9bM0LvWv9FLfiX2S4dq
> =JXYJ
> -----END PGP SIGNATURE-----
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp

-- 

-- 
Regards,
--
Brant I. Stevens, Principal & Consulting Architect
branto at argentiumsolutions.com
d:212.931.8566, x101. m:917.673.6536. f:917.525.4759.
http://argentiumsolutions.com